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MUM Europe 2020

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by MyThoughts
Fri Jun 05, 2015 11:51 pm
Forum: Wireless Networking
Topic: Unable to get ip via PoE
Replies: 6
Views: 934

Re: Unable to get ip via PoE

I can't say for certain what your issue may be, however... I have been having an ongoing issue with the RB922UAGS-5HPacD boards where they will all of the sudden stop communicating properly via the ethernet. I am getting many clients that are very upset as a result. In every case the board appears t...
by MyThoughts
Tue Sep 30, 2014 8:33 pm
Forum: RouterBOARD hardware
Topic: Is there something wrong with ccr1009-8g-1s-1s+ ?
Replies: 21
Views: 6785

Re: Is there something wrong with ccr1009-8g-1s-1s+ ?

We have just received 3 of the ccr1009-8g-1s-1s+ for use in our network as we prepare to more our core network to 10 Gig fiber. All three units we powered on for ~1 week while we preformed standard setup on them (RouterOS v6.19 firmware v3.18), during that time they were not under stress and we didn...
by MyThoughts
Sat Aug 03, 2013 12:46 am
Forum: Wireless Networking
Topic: Wifi and windfarms
Replies: 1
Views: 739

Re: Wifi and windfarms

I have dealt with a few windfarms that are present inside my coverage area. One of the windfarms in medium in size 24 x 1.6MW units. We had two separate problems with these turbines. The 1st problem affected our backhaul. We were using a 2ft 5.xx GHz Dish as a backhaul for our tower. The total link ...
by MyThoughts
Sat Jul 06, 2013 7:29 pm
Forum: RouterBOARD hardware
Topic: RB1100AHx2 Rebooting Problem
Replies: 11
Views: 4311

Re: RB1100AHx2 Rebooting Problem

We ended up testing all the ram in the initial 6 units we purchased by installing them in x86 based computers. Of the 6 units, 4 of them had ram that immediately showed errors in Memtest86. After changing the ram on the RB1100AHx2 they have been running in production for 41d on RouterOS v5.25 withou...
by MyThoughts
Tue May 28, 2013 8:22 pm
Forum: RouterBOARD hardware
Topic: RB1100AHx2 Rebooting Problem
Replies: 11
Views: 4311

Re: RB1100AHx2 Rebooting Problem

We swapped out the RAM and just like that the RB1100AHx2 was stable. Turns out upon investigation and testing the initial batch of RB1100AHx2 we recieved had defective ram chips installed. Is it possible to run (boot from USB?) MemTest86 on these things? No they are PowerPC based architecture. Howe...
by MyThoughts
Fri May 24, 2013 8:30 pm
Forum: RouterBOARD hardware
Topic: RB1100AHx2 Rebooting Problem
Replies: 11
Views: 4311

Re: RB1100AHx2 Rebooting Problem

Even though this is in an old thread I will update what happened. We basicly pulled all our initial RB1100AHx2 out of use. We had purchased more of them, and have been using them without incidient as control routers at each of our towers. The initial batch we bought were put off to the side and we c...
by MyThoughts
Wed Mar 06, 2013 11:17 pm
Forum: RouterBOARD hardware
Topic: RB750UP - Issue
Replies: 260
Views: 55482

Re: RB750UP - Issue

Modified unit (cox wireless mod) feeding 3 rockets over 200ft. of cat 5 , using 28 v 3.5 a power supply . 750 poe out monitor very very erratic. Rockets in AP mode and are said to be @ 6.5 watts , but I'm seeing monitored spikes up to and in excess of 12w which is crazy. All new units, the only thi...
by MyThoughts
Tue Feb 12, 2013 6:20 pm
Forum: RouterBOARD hardware
Topic: Failure of the R5SHpn radio cards
Replies: 3
Views: 1820

Re: Failure of the R5SHpn radio cards

I am having the exact same problem. We installed the R5SHPn cards throughout the summer and up until October. The cards are failing in the exact same manor as you described. I have contacted Mikrotik to see if there are any known issues. According to them they are not seeing any major issues. My com...
by MyThoughts
Fri Jan 18, 2013 4:41 am
Forum: RouterBOARD hardware
Topic: CLOUD CORE ROUTER
Replies: 1374
Views: 1018546

Re: CLOUD CORE ROUTER

Thanks for your answer @brianlewis... I'd like to know if you have some mangle and packet shaping configuration (queue trees) on this box as this is the bottleneck of my system. I have two other boxes (1 RB1000 and 1 RB1200) that only do routing stuff and they handle the same traffic as the x86 box...
by MyThoughts
Sat Jan 05, 2013 1:17 am
Forum: RouterBOARD hardware
Topic: CLOUD CORE ROUTER
Replies: 1374
Views: 1018546

Re: CLOUD CORE ROUTER

We currently run an x86 based RouterOS systems for our core routers. They were all custom built systems, and we are looking to upgrade for various reasons. We want to make sure that whatever we install are at least as powerful. Currently the systems are Intel Core 2 Duo E8400 based, with 2GB of ram....
by MyThoughts
Fri Oct 12, 2012 9:52 pm
Forum: RouterBOARD hardware
Topic: Any plans for 10Ghz,17Ghz,24Ghz??
Replies: 23
Views: 10005

Re: Any plans for 10Ghz,17Ghz,24Ghz??

24Ghz frequency isn't very much great. after reading some articles and posts on UBNT forum, it appears that 24Ghz frequency is very vulnerable to signal disruption. a little rain could disrupt the signal This is a funciton of the physics of the link, not the actual equipment. At the unlicensed 24 G...
by MyThoughts
Fri Oct 12, 2012 2:11 am
Forum: Wireless Networking
Topic: Btest mikrotik vs real bandwidth
Replies: 21
Views: 8453

Re: Btest mikrotik vs real bandwidth

My company has a ~200 Mbit fiber connection, I have not once had a "Speedtest" site that could max that connection, even when discounting wireless. We also have a dedicated server hosted in a datacenter about 5 hours away. That server has a 1 Gbit connection and we have run FTP tests that can max ou...
by MyThoughts
Sat Sep 29, 2012 6:22 pm
Forum: General
Topic: USA MUM Live NOW!
Replies: 6
Views: 1853

Re: USA MUM Live NOW!

Same problem here, getting server not found errors on the stream itself.

Guess I'll have to wait for the recap.
by MyThoughts
Wed Jun 06, 2012 5:50 pm
Forum: RouterBOARD hardware
Topic: RB750UP - Issue
Replies: 260
Views: 55482

Re: RB750UP - Issue

I considered this solution myself. I wasn't able to get an answer from MikroTik as to if this would actually fix the problem. Sounds like it does. Where did you find the 30W? The MikroTik was the highest one I found. What all are you running on it? What cable lengths? Tycon Power TP-DCDC-4824-HP ht...
by MyThoughts
Tue Jun 05, 2012 5:03 pm
Forum: RouterBOARD hardware
Topic: New 711 - metal ethernet
Replies: 19
Views: 5663

Re: New 711 - metal ethernet

I believe that plastic sockets was inpopular not because of the grounding issues, but for their poor mechanical strength. These metalic sockets are almost indestructable compared to those plastic ones. At least I haven't had any problems with them compared to plastic. Did you try to check continuit...
by MyThoughts
Mon Jun 04, 2012 6:06 pm
Forum: RouterBOARD hardware
Topic: New 711 - metal ethernet
Replies: 19
Views: 5663

Re: New 711 - metal ethernet

@NathanA I thought the exact same way as you till I actually checked continuity from our enclosure to those little metal clips in the plastic ethernet connector. On the RB4xx series boards if I install the board in a metal enclosure with metal standoffs, I can use a continuity meter and see that the...
by MyThoughts
Sat Jun 02, 2012 6:13 pm
Forum: RouterBOARD hardware
Topic: RB750UP - Issue
Replies: 260
Views: 55482

Re: RB750UP - Issue

MyThoughts you effectively reduced by half the power loss over the cable, of course that works perfectly well.[/quote] Your right it has been working perfectly well. Plus I feel a bit more at ease knowing the amount of current per port isn't approaching the limit during cold starts. I would love to...
by MyThoughts
Sat Jun 02, 2012 6:05 pm
Forum: RouterBOARD hardware
Topic: New 711 - metal ethernet
Replies: 19
Views: 5663

Re: New 711 - metal ethernet

Does the ground plane of the new board revision now connect to the ethernet shield, like it did on the RB1xx,3xx,4xx,5xx,6xx,8xx series boards?
by MyThoughts
Wed May 30, 2012 5:41 pm
Forum: RouterBOARD hardware
Topic: RB750UP - Issue
Replies: 260
Views: 55482

Re: RB750UP - Issue

I just ran into the over-current protection issue. We have started to use these RB750UP units quite a bit, and were just lucky in that all the initial deployments were ~65 ft of cat 5 cable between our 24V x 2A PoE injectors and the RB750UP. In this config we have had no problems powering 2 x RB411A...
by MyThoughts
Thu Apr 26, 2012 6:17 pm
Forum: RouterBOARD hardware
Topic: How to Control 1100AHx2 fans
Replies: 7
Views: 4014

Re: How to Control 1100AHx2 fans

I have 6 RB1200AHx2 that I ordered, 2 from one distributor and 4 from another. The 1st set I got, the fans are running all the time, ranging from 9k RPM to 12k RPM. The 2nd set of four I purchased the fans run at 3k RPM to 6k RPM. I've attached a screenshot to illustrate. All four of these units are...
by MyThoughts
Mon Apr 09, 2012 7:25 pm
Forum: RouterBOARD hardware
Topic: Gigabit port compatibility?
Replies: 12
Views: 2188

Re: Gigabit port compatibility?

Just FYI the PAP2/PAP2T devices are only 10Base-T devices so 10-Full is normal. Funny I never thought to actually check this on the unit. You are in fact correct, turns out the switch I put in only indicates 100/1000 the LED indicator for 10 is the same as 100, I never realized that was the case an...
by MyThoughts
Fri Apr 06, 2012 7:06 pm
Forum: RouterBOARD hardware
Topic: Gigabit port compatibility?
Replies: 12
Views: 2188

Re: Gigabit port compatibility?

I too have had terrible ethernet compatibility issues with the RB493G. Linksys PAP2T dual line VOIP phone adapters for example auto-negotiage 10 Mbps FDX, I have an old laptop that will only work at 10 Mbps HDX and requires autonegociate off or else it doesn't even register a link. I had to put a sw...
by MyThoughts
Thu Mar 22, 2012 11:55 pm
Forum: Wireless Networking
Topic: RB433GL with Nstream Dual
Replies: 3
Views: 899

Re: RB433GL with Nstream Dual

While I think that the amount of cost saving must be fairly minimal, and the hassel they are getting especially for the number of complaints I've read about the plastic ethernet connectors must drive them crazy, they do have connection for ground to shielded connectors. If you look at the bottom rig...
by MyThoughts
Thu Mar 22, 2012 11:45 pm
Forum: RouterBOARD hardware
Topic: RB1100AHx2 second core idle
Replies: 8
Views: 1799

Re: RB1100AHx2 second core idle

How many different ethernet ports are you using. While RouterOS tries to use multicore CPUs, it cannot load balance traffic coming through only one interface.

Routing itself is inherently not multicore friendly. The more interfaces involved the easier it is to multithread different traffic.

Cheers
by MyThoughts
Sat Mar 10, 2012 10:34 am
Forum: RouterBOARD hardware
Topic: RB1100AHx2 Rebooting Problem
Replies: 11
Views: 4311

Re: RB1100AHx2 Rebooting Problem

Thanks for the info, I believe that the PoE port in te port currently being used. I'll have to make a trip out to the remote site tomorrow and change that.
by MyThoughts
Sat Mar 10, 2012 1:54 am
Forum: RouterBOARD hardware
Topic: RB1100AHx2 Rebooting Problem
Replies: 11
Views: 4311

RB1100AHx2 Rebooting Problem

I recently purchaed 6 x RB1100AHx2 that we were planning on using to replace our older VIA EPIA based core routers. We switched out one yesterday, and it appeared to work fine. The unit we switched out was our traffic shaper, it has a fair number of queues, and firewall/mangle rules, but the traffic...
by MyThoughts
Mon Nov 21, 2011 3:35 am
Forum: RouterBOARD hardware
Topic: RB600 Reboot Issue - Revisit
Replies: 11
Views: 4035

Re: RB600 Reboot Issue - Revisit

Yes those are bad electrolytic capacitors. The bad electrolyte will cause the capacitors function at a reduced capacitance, which leads to the instability of the RB600s. In my testing dropping the Tx power of the radio cards does help, however the problem will only get worse as the capacitors degrad...
by MyThoughts
Fri Nov 18, 2011 4:38 am
Forum: Wireless Networking
Topic: Request Link Planner Software
Replies: 9
Views: 2361

Re: Request Link Planner Software

No, NV2 has no bearing on the physics of a link.

Cheers
by MyThoughts
Thu Nov 17, 2011 12:40 am
Forum: Wireless Networking
Topic: Request Link Planner Software
Replies: 9
Views: 2361

Re: Request Link Planner Software

99% of the planning for a link I do is getting the terrain maps for the link as accurate as possible, trees, misc. obstructions, etc. All the path loss, fresnel zone, EIRP, etc. is all very easily calculated (I use a spreadsheet I made years ago). Radio Mobile is one of the best available link plann...
by MyThoughts
Tue Nov 15, 2011 4:21 am
Forum: Wireless Networking
Topic: data rate/signal strength
Replies: 5
Views: 1504

Re: data rate/signal strength

On most 802.11 or "off-the-shelf" radios, the transmit power is decreased based on reached a desired EVM amount. When transmiting using simple modulations the amount of error in the recieved signal vs. what is expected can be fairly high, thus you typcially have better recieve sensitivity, and you c...
by MyThoughts
Fri Sep 30, 2011 9:26 pm
Forum: Wireless Networking
Topic: Wireless in a hidro tunnel
Replies: 4
Views: 775

Re: Wireless in a hidro tunnel

If you have the ability to install cable in the tunnel you could adopt a leaky cable system. I don't have direct experience with this, but I did do some work for a mining company that used it extensively. Check this for a decent read... http://www.scribd.com/doc/62870575/46/Tunnel-Coverage-Based-on-...
by MyThoughts
Fri Sep 30, 2011 12:51 am
Forum: Wireless Networking
Topic: Wireless security, again... Point to point links
Replies: 2
Views: 711

Re: Wireless security, again... Point to point links

This is a decent read about the general tools that are publicly availble to crack wireless security. http://www.tomshardware.com/reviews/wireless-security-hack,2981.html You can 'harden' the links a bit more by using Mikrotik propierty protocols it isn't really more secure but it makes it that much ...
by MyThoughts
Thu Sep 29, 2011 3:57 am
Forum: RouterBOARD hardware
Topic: rb433 keeps rebooting, no login possible. What to do?
Replies: 12
Views: 6535

Re: rb433 keeps rebooting, no login possible. What to do?

I've seen this a number of times for various reasons: 1) I've had an few XR5 cards that failed and would cause an RB433 to reboot as soon as it finished booting 2) I've had a dozen RB600s do this after 1-2 years in operation (the capacitors were faulty on all the boards) 3) I've had a mix of differe...
by MyThoughts
Wed Sep 28, 2011 9:56 pm
Forum: Wireless Networking
Topic: Good Signal Strength
Replies: 15
Views: 21577

Re: Good Signal Strength

Thee easily measurable attributes for a link would be signal, noise, and the recieve sensitivity. Signal will tell you how powerful the signal you are recieving is. Noise will tell you how much background chatter there is. (I find this reading useless in RouterOS. For example I can put two 5 GHz ant...
by MyThoughts
Wed Sep 28, 2011 1:05 am
Forum: General
Topic: NV2 Sync Support
Replies: 90
Views: 15761

Re: NV2 Sync Support

I'd like to believe you found a way to sync, but I am extremely skeptical. Using 802.11a in NV2 mode @ 20 MHz with ROS v5.7 outdoor with RX/TX signals of ~-65 I am able to achieve a one way TCP throughput of 33 Mbps on a test link I setup. If what you are doing with a dual chain card in legacy 802.1...
by MyThoughts
Tue Sep 27, 2011 6:29 am
Forum: General
Topic: NV2 Sync Support
Replies: 90
Views: 15761

Re: NV2 Sync Support

Hardware assistance I would take as refering to an external accurate clock source. Typically clock sources on mainboards, or any electronic device are now using a crystal oscillator, but variation in the crystal, temp, and other effects can cause time drift. To humans a clock being off by 1-2 second...
by MyThoughts
Mon Sep 26, 2011 5:27 am
Forum: General
Topic: NV2 Sync Support
Replies: 90
Views: 15761

Re: NV2 Sync Support

@WirelessRudy Do you actually know what GPS sync is? If you do, how are you syncing using RouterOS, because from my point of view its not possible unless you had access to the source and recoded the NV2 (TDMA) protocol to support it. The throughput in one direction will drop. The simple reasoning is...
by MyThoughts
Thu Sep 01, 2011 3:19 pm
Forum: RouterBOARD hardware
Topic: RB493GAH Ethernet Link/Auto-Negotiation Issues
Replies: 1
Views: 967

RB493GAH Ethernet Link/Auto-Negotiation Issues

We have typically used RB493AH for control routers at our tower sites, and I use them at home/work and at a few business clients. Since the RB493GAH was released our plan was to use them in all our new deployments, as well as upgrade a few locations where we have gigabit capable equipment. I changed...
by MyThoughts
Fri Jul 29, 2011 2:27 am
Forum: Wireless Networking
Topic: RB600A, 11n, Dual-pol, real speed <25Mbps
Replies: 8
Views: 1226

Re: RB600A, 11n, Dual-pol, real speed <25Mbps

Strange. I've got 3 RB600 and 1 RB600A, 2 and a half years, no problems so far. Two of them are fully loaded. What were you using to power them? On topic, the best I've seen was a little over 20Mb, but I haven't really stressed it. I haven't had the opportunity. Some were powered with 48V DC power ...
by MyThoughts
Wed Jul 27, 2011 1:09 am
Forum: General
Topic: Eth. port flapping, when is this going to be solved?
Replies: 78
Views: 10304

Re: Eth. port flapping, when is this going to be solved?

While I am in the boat with everyone else with the wireless disconnects, I have yet to find any port flapping issues on my network (~800 CPE) that appeared as a result of RouterOS upgrades. The network is a mix of RB112, RB133, RB532, RB333, RB600, RB411, RB433. I am also running a mix of v4.1x, v5....
by MyThoughts
Wed Jul 27, 2011 12:35 am
Forum: Wireless Networking
Topic: RB600A, 11n, Dual-pol, real speed <25Mbps
Replies: 8
Views: 1226

Re: RB600A, 11n, Dual-pol, real speed <25Mbps

Yes the RB600A can push alot more then 25 Mbps when they work. A word of caution. I have had to replace all 25 RB600s I've deployed some A some not A. They were all ordered at different time periods, months apart. There are 5 capacitors that leaked on all 25 of my boards after around 9 months -12 mo...
by MyThoughts
Wed Jul 20, 2011 4:35 am
Forum: Wireless Networking
Topic: PTP (NSM5 to NSM5) VS (SXT to SXT) real comparison
Replies: 7
Views: 5878

Re: PTP (NSM5 to NSM5) VS (SXT to SXT) real comparison

While I don't doubt your results, the bandwidth test methodology plays a big BIG part is testing real-world capabilities. My company has had to replace 6 Mikrotik RouterOS backhaul links this year, sure at 3 AM I could push >100 Mb/s through the links, but during daytime they were all over the place...
by MyThoughts
Tue Mar 01, 2011 7:33 pm
Forum: General
Topic: Routerboard and License Expiry/Upgrade
Replies: 0
Views: 463

Routerboard and License Expiry/Upgrade

Last week my company was rolling RouterOS updates to clients running on various different Routerboard products. After updating many older units they need a license upgrade within 24hrs. Normally this is not an issue, but do to a very sudden family emergency I was called away. Do to the emergency my ...
by MyThoughts
Fri Feb 04, 2011 3:46 pm
Forum: General
Topic: Feature request: GPS Synchronisation
Replies: 31
Views: 5433

Re: Feature request: GPS Synchronisation

I think all this GPS stuff is over hyped . It is because we are all operating in a license-free band and yes, you can get away from self-interference but your competitor again will be shouting in your ear a few meters away. If we had operating in license-exempt bands, we could save spectrum and red...
by MyThoughts
Thu Jan 27, 2011 10:38 pm
Forum: RouterBOARD hardware
Topic: Why doesnt RouterOS support Broadcom Wireless?
Replies: 17
Views: 5052

Re: Why doesnt RouterOS support Broadcom Wireless?

The only reason I am repying to this is to keep Mikrotik informed of what their users want. Mikrotik has been very good in adding features that users request (within reason of course). I myself have made requests for features that were not feasible for various reasons. I have also made feature reque...
by MyThoughts
Fri Jan 14, 2011 8:55 pm
Forum: Wireless Networking
Topic: I want Wireless AP sync. TDD or FDD with TDMA NV2
Replies: 90
Views: 12932

Re: I want Wireless AP sync.

GPS sync is in our to-do list.
This is what I needed to hear. As long as its implemented in a timely fashion, Mikrotik will continue to see business from me.

Cheers
by MyThoughts
Thu Jan 13, 2011 11:59 pm
Forum: Wireless Networking
Topic: I want Wireless AP sync. TDD or FDD with TDMA NV2
Replies: 90
Views: 12932

Re: I want Wireless AP sync.

Many of us are in the same boat, we need to maximize spectral efficiency. I've been using RouterOS for our wireless network for ~5 yrs now. While AP sync, and tower sync would have been nice features to have they were not required features when evaluating hardware for our network. To get around the ...
by MyThoughts
Tue Dec 21, 2010 2:36 am
Forum: General
Topic: Feature request: GPS Synchronisation
Replies: 31
Views: 5433

Re: Feature request: GPS Synchronisation

This has been a long standing request from many people. My company's network is really starting to feel the strain without this feature. Self interference is starting to become one of our biggest challenges at our distribution tower sites.

+1 Vote for GPS Sync
by MyThoughts
Wed Nov 17, 2010 3:36 am
Forum: Wireless Networking
Topic: RB 600 problem
Replies: 3
Views: 991

Re: RB 600 problem

Chances are the capacitors are leaking, the RB600 and RB600A were notorious for leaking capacitors. I have around 25 RB600/RB600A and not a single one has lived past 18 months without changing the capacitors on the boards.

http://forum.mikrotik.com/viewtopic.php?f=3&t=37168

Cheers
by MyThoughts
Sat Aug 28, 2010 5:09 am
Forum: Wireless Networking
Topic: 802.11n wireless link signal strength issues
Replies: 10
Views: 4925

Re: 802.11n wireless link signal strength issues

See my post http://forum.mikrotik.com/viewtopic.php?f=1&t=44299 Is the link you upgraded using a single antenna and now a single chain on the r52Hn? If you are using a single chain and using v4.1x then your problem may be the RouterOS software. From my testing when using a single chain on a 'N' base...
by MyThoughts
Wed Aug 18, 2010 5:06 pm
Forum: General
Topic: Possible v4.11, v5.0b5/6 Wireless Bugs
Replies: 0
Views: 1407

Possible v4.11, v5.0b5/6 Wireless Bugs

I have been playing with the new NV2 protocol in v5.0b5/6 recently (very impressive). During my testing I setup a mixed RouterOS environment. My setup is as follows: 1 x RouterOS v3.30 with XR5 1 x RouterOS v4.11 with XR5 1 x RouterOS v4.11 wth XR71-A/5 1 x RouterOS v5.0b6 with XR5 1 x RouterOS v5.0...
by MyThoughts
Fri Jun 18, 2010 1:13 am
Forum: General
Topic: 10mhz Channels & R52N
Replies: 7
Views: 3034

Re: 10mhz Channels & R52N

I was mistaken about the small channel support (5 Mhz and 10 MHz), turns out it is present on the atheros 11n chipset.

Router OS v5.0b3 has fixes for those channel sizes.

Cheers
by MyThoughts
Fri Jun 18, 2010 1:11 am
Forum: Wireless Networking
Topic: 10mhz 802.11N
Replies: 11
Views: 3425

Re: 10mhz 802.11N

Changelog lists fixs in the small channel support on 11n cards.

Going to be testing it over the next few weeks, I don't think I've ever been happier about being wrong...

Cheers
by MyThoughts
Mon May 17, 2010 9:27 pm
Forum: Wireless Networking
Topic: 10mhz 802.11N
Replies: 11
Views: 3425

Re: 10mhz 802.11N

10 MHz is a radio technology, it is possible that small channel support is present on the Atheros chips but needs to be implemented. My only assumtion was that the AR9220 and AR9160 did not actually have Atheros small channel capability, I assumed this as I can find no docmentation from Atheros to s...
by MyThoughts
Mon Mar 22, 2010 10:45 pm
Forum: Wireless Networking
Topic: I have been testing a new 900mhz card.
Replies: 22
Views: 5392

Re: I have been testing a new 900mhz card.

Could you post bandwidth screenshots. I have used other 900 MHz equip that while things may look OK, as soon as you start to pass traffic they become unstable and/or the actual bandwidth isn't that great.

Cheers
by MyThoughts
Mon Feb 08, 2010 11:45 pm
Forum: Wireless Networking
Topic: 10mhz 802.11N
Replies: 11
Views: 3425

Re: 10mhz 802.11N

This question was asked a while back in the BETA forums, I am just copying my response from there. Small channel sizes (5 MHz & 10 MHz), and large channels (40 MHz Turbo) were all features specific to Atheros radio cards. Mikrotik implemented support for these features as users demanded it. However,...
by MyThoughts
Sun Jan 03, 2010 8:32 pm
Forum: General
Topic: 10mhz Channels & R52N
Replies: 7
Views: 3034

Re: 10mhz Channels & R52N

Small channel sizes (5 MHz & 10 MHz), and large channels (40 MHz Turbo) were all features specific to Atheros radio cards. Mikrotik implemented support for these features as users demanded it. However, Atheros has not produced a new radio chip that features the small channel ability and 802.11n feat...
by MyThoughts
Fri Dec 18, 2009 10:59 pm
Forum: RouterBOARD hardware
Topic: RB600 Reboot Issue - Revisit
Replies: 11
Views: 4035

Re: RB600 Reboot Issue - Revisit

Easy to fix, hard problem to find. When boards are in operation mounted in outdoor enclourses, its a serious pain the ass to find the issue and/or check to see if it is a problem. The other issue is it takes time for capacitors to visibility show the problem, the capacitors don't go bad they are man...
by MyThoughts
Tue Dec 15, 2009 10:45 pm
Forum: RouterBOARD hardware
Topic: RB600 Reboot Issue - Revisit
Replies: 11
Views: 4035

Re: RB600 Reboot Issue - Revisit

Finally got around to taking a picture of one of the boards.

Image

I was able to get 3 of the serial numbers before the boards went out for repair.

189801FD8323/827
189801FD83E6/827
189801FD8332/827

Cheers
by MyThoughts
Thu Dec 03, 2009 7:13 am
Forum: RouterBOARD hardware
Topic: RB600 Reboot Issue - Revisit
Replies: 11
Views: 4035

Re: RB600 Reboot Issue - Revisit

I'll take some pictures and post them when I get a chance. The boards in question were all configured identically. 1 x XR5 1 x XR2 Using Routerboard indoor aluminum case for RB600 48V 1A PoE injector (each board had its own PoE injector) The each RB indoor case was grounded The capacitors in questio...
by MyThoughts
Wed Dec 02, 2009 7:40 am
Forum: RouterBOARD hardware
Topic: RB600 Reboot Issue - Revisit
Replies: 11
Views: 4035

RB600 Reboot Issue - Revisit

The past month I have been noticed 5 of my RB600s in deployment were rebooting at seemingly random times. The longest uptime I noticed was just over 2 days, with most units rebooting 2-3 times per day. This is in stark contrast to many of the other RB600s which have up-times well over 200 days. We t...
by MyThoughts
Tue Nov 10, 2009 1:21 am
Forum: Wireless Networking
Topic: did someone have used this cheap spectrum analyzer ?
Replies: 6
Views: 1125

Re: did someone have used this cheap spectrum analyzer ?

I have used one of these units, and diagnosed quite a few problems on location with one as well. However the actual LCD interface is not that great, I always use it with a notebook/netbook to get readable results Do not expect the world of it, it will not match a $20,000 SA, but like I said I have u...
by MyThoughts
Tue Nov 03, 2009 10:38 pm
Forum: Wireless Networking
Topic: Smoth hopping on roaming mobile client, is this possible?
Replies: 6
Views: 2132

Re: Smoth hopping on roaming mobile client, is this possible?

802.11a,b,g,n was not designed to do this. One way I could see having a smooth transistion without any dropped packets using this off-the-shelf technology is to use a multiple radio unit. When near the trade-off point the unit would have a connection to each AP. This way there is never a time where ...
by MyThoughts
Sat Oct 03, 2009 7:37 pm
Forum: RouterBOARD hardware
Topic: RB133 bricked
Replies: 5
Views: 1283

Re: RB133 bricked

In terminal window when connection by serial port you should see the message to press the "any key" to enter routerboot options right before the information you posted. From there you can tell the unit to boot via ethernet and use netinstall to restore RouterOS. This prevents the unit from attemptin...
by MyThoughts
Thu Aug 20, 2009 6:06 pm
Forum: General
Topic: Beamforming and Transmit Sync
Replies: 0
Views: 732

Beamforming and Transmit Sync

I know these are not little features, and would most likely require Mikrotik working with a partner. BUT I would love to see beamforming make its way into the wifi universe. It is already in use for many other 'high-end' AP solutions, and cell solutions. To me this is just one more feature that woul...
by MyThoughts
Tue Jun 23, 2009 6:40 am
Forum: Wireless Networking
Topic: Low Throughput - Why doesn't bandwidth get through?
Replies: 8
Views: 3539

Re: Low Throughput - Why doesn't bandwidth get through?

I run all my site with the newer modulation (OFDM), so 802.11g,a,5mhz,10mhz the affect of CSMA on 802.11b is much less as it doesn't pack as much throughput per mhz of spectrum. I have never run these tests with 802.11b.

Could you post some of your bandwidth screenshots and data?

Cheers
by MyThoughts
Sun Jun 21, 2009 4:04 pm
Forum: Wireless Networking
Topic: Low Throughput - Why doesn't bandwidth get through?
Replies: 8
Views: 3539

Re: Low Throughput - Why doesn't bandwidth get through?

This is in part a problem with the way 802.11 was designed. It was not designed with having large numbers of simultaneous connections. Example You have an AP (5 GHz or 2.4 GHz, doesn't matter) you test it with one client and get 12 Mbps Conventional wisdom would tell you that you could have 12 x 1 M...
by MyThoughts
Sun Jun 21, 2009 3:24 pm
Forum: Wireless Networking
Topic: Advanced backhaul tweaking - best test procedure
Replies: 5
Views: 1858

Re: Advanced backhaul tweaking - best test procedure

It is true that the Tx frames vs. Tx Hw Frames is an indicator of retransmits for normal 802.11 operation but there is an additional caveot that makes comparison a little more confusing once the Nstreme protocol is involved. Beceause the Nstreme protocol can package multiple packets together is one ...
by MyThoughts
Tue Jun 02, 2009 3:48 am
Forum: Wireless Networking
Topic: 2.4GHz issues
Replies: 2
Views: 618

Re: 2.4GHz issues

My experience is that it is very situational... the error really means BAD LINK! Could be: 1) not enough power going to card (seen this when you try to populate RB112 with two 'higher' power cards) 2) Interference (could be in-band or out-of-band) 3) Obstruction (trees, etc.) 4) Reflections (large m...
by MyThoughts
Sat May 23, 2009 12:02 am
Forum: Wireless Networking
Topic: What happens when input voltage drops low ?
Replies: 35
Views: 5010

Re: What happens when input voltage drops low ?

The batteries I am to assume are connected in series and you are measuring 11.6 V at the battery. If this is the case then they are most likely discharged, the RB600s would put very little load on them and I would imagine when properly working they would measure 12.6 - 13.2 volts. Its not the voltag...
by MyThoughts
Fri May 22, 2009 4:56 pm
Forum: Wireless Networking
Topic: Dual polarization antennas or two antennas in one unit
Replies: 75
Views: 43979

Re: Dual polarization antennas or two antennas in one unit

mramos, has exactly the right concept it is all about the isolation of one signal from the other, it doesn't really matter the configuration of the actual antennas only the raw numbers. I used to use signal-pol 29 dBi dishes and would put 2 of them up wired to 2 seperate radio enclosures. Antenna se...
by MyThoughts
Thu May 14, 2009 4:38 pm
Forum: Wireless Networking
Topic: Several links over ONE pair of antennas
Replies: 7
Views: 1763

Re: Several links over ONE pair of antennas

Very interesting, however putting more then one signal on an antenna from multiple radios will in effect create enormous amounts of 'noise' for the other radios. The 802.11 radios do not filter out of band iterferance very well (try setting up a pair of links and set the frequencies 20 Mhz apart, th...
by MyThoughts
Thu May 14, 2009 4:24 pm
Forum: Wireless Networking
Topic: Using the "in between" frequencies
Replies: 12
Views: 1682

Re: Using the "in between" frequencies

Looks like a nice little setup there. The only frequencies you can set a radio to and have it work correctly, are the ones that show up in the wireless info for the card (ie. '/interface wireless info print'). It is my understanding that the 'custom frequencies' allows access all the cards available...
by MyThoughts
Thu May 07, 2009 3:11 am
Forum: Wireless Networking
Topic: When Mikrotik support 11n mimo (SR71-5)
Replies: 62
Views: 19752

Re: When Mikrotik support 11n mimo (SR71-5)

I too am waiting for Mikrotik to release not only the 'n' drivers but also the finalized new Nstreme version. For the most part I am getting by with the dual-nstreme and turbo for now, its not as efficient as I would like but it is flexible. On a side note I just finished testing a pair LiteStation-...
by MyThoughts
Sat Apr 18, 2009 11:18 pm
Forum: Wireless Networking
Topic: channel sizes
Replies: 3
Views: 733

Re: channel sizes

I too would like to see even smaller and more efficient channel sizes, however I do believe the current 5 MHz and 10 MHz channel sizes are a function of the Atheros small channels and Mikrotik has intergrated support into RouterOS for that. Its really a function of the radio, so I don't think Mikrot...
by MyThoughts
Sat Mar 07, 2009 8:17 pm
Forum: RouterBOARD hardware
Topic: bizarre behaviour
Replies: 5
Views: 897

Re: bizarre behaviour

The statistics you listed as having a problem with will only show up in you have a RouterOS unit on both ends of the link.

ie.

RouterOS to RouterOS -> full TX/RX statistics
RouterOS to anything else -> can only monitor local Rx signal
by MyThoughts
Fri Feb 20, 2009 12:18 am
Forum: General
Topic: Monitoring Downloading
Replies: 9
Views: 1199

Re: Monitoring Downloading

I understand your frustrations, I too am continually expanding and am finding my existing SNMP monitoring very lacking. As a natted system any customers of yours doing illegal or "bad" things on the network will show up as your IP address. I have been exploring different software packages and setups...
by MyThoughts
Fri Feb 06, 2009 9:43 pm
Forum: Wireless Networking
Topic: Interesting find regarding low signals w/RB333
Replies: 4
Views: 639

Re: Interesting find regarding low signals w/RB333

I to would be skeptical of a RB333 causing this, however with that said it isn't impossible but it would be due to a defective RB333. If the RB333 was not powering the card with the correct power all kinds of strange things happen. I've had a few situations where a RB532A with XR5 did something equa...
by MyThoughts
Thu Feb 05, 2009 11:27 pm
Forum: General
Topic: TrafficFlow/NetFlow and Dynamic Interfaces
Replies: 3
Views: 1049

TrafficFlow/NetFlow and Dynamic Interfaces

I have been exploring software to capture and monitor the traffic running across my network. I am using the Traffic Flow of RouterOS to output flows from the gateway control routers in my network. These control routers are connected to a switch and are communicating with our mater control routers vi...
by MyThoughts
Wed Feb 04, 2009 5:44 pm
Forum: The Dude
Topic: ACK problem in v3.x
Replies: 3
Views: 1006

ACK problem in v3.x

I have been using The Dude since its RC releases some time ago and must say its a fantastic program. With that said the newest release while adding some much needed features has introduced in my opinion some unwanted features/bugs. The problem I am having it that when I ACK a device when it is in th...
by MyThoughts
Sat Jan 31, 2009 4:37 am
Forum: General
Topic: RB433AH with dual XR5's - Intermittent Shut Downs
Replies: 5
Views: 959

Re: RB433AH with dual XR5's - Intermittent Shut Downs

I can assure you that RB433AH works just fine with 2 x XR5's.
I always power my RB433AH's with 24V x 2A PoE injectors.

Of note I also run many RB433's with 2 x XR5's with 24V x 0.8A.

Cheers
by MyThoughts
Wed Jan 28, 2009 9:29 pm
Forum: General
Topic: Using Simple Queues with Queue Tree
Replies: 1
Views: 654

Using Simple Queues with Queue Tree

I have been having a long time problem with simple queues not counting traffic correctly. I have narrowed the problem down to a conflict between the way I use Queue Tree for prioritization. My Setup: ISP1---> ISP2---> ISP3---> Control Router ---> Clients ISP4---> ISP5---> I use Simple Queues on the ...
by MyThoughts
Sat Jan 17, 2009 10:12 pm
Forum: General
Topic: Feature request, temperature
Replies: 6
Views: 1978

Re: Feature request, temperature

A onboard temperature sensor would be a godsend. I live in an area that goes from -30° to +45° degrees Celsius and having on baord temperature reading would allow us to look for patterns when problems occur to see if they are temperature related. Testing a RB in a freezer and having it work reliably...
by MyThoughts
Sat Jan 17, 2009 9:53 pm
Forum: General
Topic: mlppp ready for production environment?
Replies: 4
Views: 628

Re: mlppp ready for production environment?

Depends on what your production enviroment is, but overall my experience with MLPPP and RouterOS has been: When its working it works good When something goes wrong (DSL modem drops, ISP has an issue, etc.) you can almost assure yourself only a full reboot will bring proper functionality back. See: h...
by MyThoughts
Sat Jan 17, 2009 9:48 pm
Forum: General
Topic: MLPPP has more active links than configured links
Replies: 4
Views: 786

Re: MLPPP has more active links than configured links

This is sorta ironic, but just this morning i had this very issue, RB433AH (ROS v3.18 firmware v2.18) with 4 DSL lines using MLPPP. Over the past 2 months I have had this issue on average 1-2 times per week. The PPPoE-client reports 8 active links, but only 4 interfaces are specified. Disabling/reen...
by MyThoughts
Fri Jan 16, 2009 11:07 pm
Forum: RouterBOARD hardware
Topic: Problems with Rb433AH
Replies: 8
Views: 1795

Re: Problems with Rb433AH

There is a built in memory test functions with the RouterBoot bios. Other then that you just have to setup a test enviroment and run them for long periods of time. On x86 machines there was a /tool memory-test and /tool cpu-test but I've never used them and I am pretty sure they don't exist for Rout...
by MyThoughts
Mon Jan 12, 2009 10:42 pm
Forum: Wireless Networking
Topic: Better wireless throughput with RB600 or RB433AH?
Replies: 8
Views: 1637

Re: Better wireless throughput with RB600 or RB433AH?

In my lab I did extensive testing on the 'theoretical' 'real world' performance. What is 'theoretical' 'real world' performance, simply put its the maximum speed of RouterOS on 802.11a,b,g link with absolutely minimal interference, perfect LOS and perfect link quality, yet still actually using the r...
by MyThoughts
Sat Jan 10, 2009 1:14 am
Forum: Wireless Networking
Topic: WDS Bridged - Maximum users masq'd through single public IP?
Replies: 3
Views: 721

Re: WDS Bridged - Maximum users masq'd through single public IP?

You would not want to use UPNP if you are mas'q that many ppl behind one IP, else you would run into major issues with port forwarding. Assuming you have the horsepower to do the mangling/queueing, the only limitation with mas'qing that many clients in RouterOS (that I am aware of) is the number of ...
by MyThoughts
Sat Jan 10, 2009 12:49 am
Forum: Wireless Networking
Topic: Bouncing Traffic?
Replies: 2
Views: 493

Re: Bouncing Traffic?

Torch the link and see if any traffic is passing through it.

Cheers
by MyThoughts
Thu Jan 08, 2009 7:51 pm
Forum: Wireless Networking
Topic: Better wireless throughput with RB600 or RB433AH?
Replies: 8
Views: 1637

Re: Better wireless throughput with RB600 or RB433AH?

Both boards provide enough 'horsepower' to top out a Nstreme2 wireless link. If you require gigabit routing via ethernet or true 802.3af PoE support your only choice is the RB600. If you are going to using lots of queue/mangle/firewall rules go for the RB433AH as its processor is faster. Both boards...
by MyThoughts
Wed Jan 07, 2009 8:18 pm
Forum: Wireless Networking
Topic: 5Ghz 10Mhz channels.... multiple frequencies
Replies: 16
Views: 4385

Re: 5Ghz 10Mhz channels.... multiple frequencies

Of course the signal is actually there, when you set a device to a frequency at is has 'X' output power that power doesn't go to 0 as soon as you leave that spectrum width of that device. The reason you 'seeing' the ghost frequencies could be do to an Atheros issue, or it could how it is handled in ...
by MyThoughts
Tue Jan 06, 2009 8:01 pm
Forum: Wireless Networking
Topic: 5Ghz 10Mhz channels.... multiple frequencies
Replies: 16
Views: 4385

Re: 5Ghz 10Mhz channels.... multiple frequencies

While I agree the client side SHOULD connect to the highest signal, I have have dozens of times where customers have called saying there internet 'feel' slow, and sure enough when I check there unit it will be connected to one of the ghost frequencies. It is rare but when you have hundreds of client...
by MyThoughts
Sat Dec 13, 2008 7:55 pm
Forum: Wireless Networking
Topic: AM I insane ? WIMAX and NLOS !
Replies: 4
Views: 1941

Re: AM I insane ? WIMAX and NLOS !

I have personally talked with a few of the companies that are rolling out 5 GHz WIMAX products. The term NLOS for some people means Non-LOS, for others it Near-LOS, for the most past most WIMAX NLOS refers to Near-LOS. When I asked about performance there was no doubt that the WIMAX platform could o...
by MyThoughts
Sat Dec 13, 2008 6:15 pm
Forum: General
Topic: Feature Request - Band Specification in Connect List
Replies: 1
Views: 734

Feature Request - Band Specification in Connect List

Could there be the addition of band specification in the connect list? Almost 100% of my RouterOS network uses dual-band (2.4/5 GHz) radio cards, and about 50% of the antenna's are dual-band as well. I am slowly migrating my entire network (well as much as possible) to 5GHz, but I am not taking any ...
by MyThoughts
Thu Dec 11, 2008 9:11 pm
Forum: Scripting
Topic: How do you clear a global variable?
Replies: 11
Views: 12371

Re: How do you clear a global variable?

Thanks for the replies the '/system script enviroment' method works great. I was really getting tired of unneeded global variables.

Cheers
by MyThoughts
Tue Dec 09, 2008 11:39 pm
Forum: Scripting
Topic: How do you clear a global variable?
Replies: 11
Views: 12371

How do you clear a global variable?

I'm stuck updating some old v2.9.x scripts to work with v3.17 but I can't find a way to clear a defined global variable. Can anyone post the command(s) necessary to clear an already defined global variable? I've reviewed the only available documentation ( http://wiki.mikrotik.com/wiki/Scripting ) bu...
by MyThoughts
Tue Dec 09, 2008 8:20 pm
Forum: The Dude
Topic: The Dude v3.0 - New map style looks terrible
Replies: 5
Views: 2109

The Dude v3.0 - New map style looks terrible

I decided to update to my Dude from v2.2 to v3.0 (mainly due to the decreased network traffic). I did not test any of the v3.0rc's and this was my 1st look. Everything updates fine, my custom probes/graphics/mibs all worked fine after the update... However, the new map style looks absolutely terribl...
by MyThoughts
Thu Nov 27, 2008 5:00 pm
Forum: General
Topic: Is (( PRIORITY )) Really working ???
Replies: 188
Views: 39216

Re: Is (( PRIORITY )) Really working ???

I think I may have some time this Sunday to type up a wiki article. I'll create that with an example of my QoS setup. Another thing to mention is I've noticed some internet service providers are already doing their own internal QoS I noticed this on my home internet connection. This made it a bit mo...
by MyThoughts
Thu Nov 27, 2008 1:21 am
Forum: Wireless Networking
Topic: New link advise needed...
Replies: 6
Views: 1018

Re: New link advise needed...

I am making the big mistake of assuming that you meant 'not LOS' 5 GHz is my preferences whenever possible, however... 5 GHz is most likely out of the question, although I have had sucess with near-los 5 GHz or very short (<400m) 5 GHz links the penetration capability at those frequencies is not ver...
by MyThoughts
Tue Nov 25, 2008 10:07 pm
Forum: General
Topic: How fast are queue tree?
Replies: 1
Views: 586

Re: How fast are queue tree?

The actual speed of the routing device x86/routerboard, etc. will affect this, but based on how a router works it should be near instant as its operating on packets in a sequential order, so priority marking on a sufficiently fast routeros machine would be occuring 'real-time' So in general working ...
by MyThoughts
Sat Nov 22, 2008 1:35 am
Forum: General
Topic: Is (( PRIORITY )) Really working ???
Replies: 188
Views: 39216

Re: Is (( PRIORITY )) Really working ???

I am going to try and make this is my last post on this topic. 1. No software/hardware can prioritize inbound packets, without the qos 'machine' knowing what the max bandwidth is. Think about this, how do you prioritize something that hasn't arrived yet. You need them to queue up then you can do QoS...
by MyThoughts
Wed Nov 19, 2008 7:50 pm
Forum: RouterBOARD hardware
Topic: RB133 - what's using CPU?
Replies: 4
Views: 1078

Re: RB133 - what's using CPU?

I've found that upgrading the firmware does help alot on the RB1xx boards with v3.x. However, it is well known that v3.x works like crap on all the RB1xx boards. I used to use them as CPEs when they were available, and in the v2.9.x days it worked like a charm I had maybe 20-30 mangle/queue rules on...
by MyThoughts
Wed Nov 19, 2008 7:38 pm
Forum: Wireless Networking
Topic: Cloaking Compatability with StarOS
Replies: 2
Views: 833

Re: Cloaking Compatability with StarOS

This is something I have been wondering myself, if anyone knows if 5MHz/10Mhz channel sizes works between StarOS and RouterOS speak up.

Cheers
by MyThoughts
Wed Nov 19, 2008 7:20 pm
Forum: General
Topic: Is (( PRIORITY )) Really working ???
Replies: 188
Views: 39216

Re: Is (( PRIORITY )) Really working ???

This post is titled wrong, from what I recall the OP wanted to differeniate between web surfing and downloading. The HTB system that RouterOS uses works fine you just have to get the correct queue and mangle rules for shaping the appropiate traffic. The problem the OP is having is how do you priorit...
by MyThoughts
Sun Nov 09, 2008 5:29 pm
Forum: General
Topic: Is (( PRIORITY )) Really working ???
Replies: 188
Views: 39216

Re: Is (( PRIORITY )) Really working ???

Priority is RouterOS is a customizable solution, its not geared to any one scenario. I use priority alot espically for things like VOIP, gaming, and streaming traffic. For simplicity any time I mention HTTP traffic I am referring to port 80 traffic. I don't attempt to differeniate between Website HT...
by MyThoughts
Sat Nov 08, 2008 9:21 pm
Forum: RouterBOARD hardware
Topic: improve ccq
Replies: 6
Views: 6032

Re: improve ccq

While it is possible, the problem is most likely NOT the antennas. On the 52km link the the above poster mentioned I came up with a theoretical recieve signal of -66.3 when working at a signal rate of 54 Mbps (Tx power of XR5 is 23 dBm and recieve sensitivity of -74) and including 10 feet of LMR400 ...
by MyThoughts
Tue Nov 04, 2008 9:04 pm
Forum: RouterBOARD hardware
Topic: Find a form factor... AND STICK WITH IT!
Replies: 10
Views: 1979

Re: Find a form factor... AND STICK WITH IT!

I couldn't agree with you more, after deploying hundreds of RB112's and RB532's I too am really frustrated with the change to the new layout. I am hoping that they learned their lesson and continue to roll out any new products with the same sizing as the RB133, RB411, and RB433 series so I don't hav...
by MyThoughts
Wed Oct 29, 2008 11:44 pm
Forum: Wireless Networking
Topic: XR3-3.7/XR2 Cards Power Saving problem RouterOS problem 3.x
Replies: 33
Views: 4931

Re: XR3-3.7 Cards Power Saving problem - RouterOS problem 3.x

I am 99.9% certain that RouterOS clients (ie. RB411 set to station) do NOT support 802.11 power-saving and thus the radio will never go into power saving mode. The AP support for power-saving just means that the AP continues to keep radio associations from power-saving clients (ie. 802.11b/g laptops...
by MyThoughts
Thu Oct 23, 2008 3:52 pm
Forum: RouterBOARD hardware
Topic: TX Power problem with XR5 Ubiquiti card
Replies: 4
Views: 2229

Re: TX Power problem with XR5 Ubiquiti card

All XR5's have this issue. If you set XR5 to TX power to <15 the transmitter of the card will not function correctly (I have never investigated why but I thought the XR5 used a 10dB internal amplifier and it had something to do with that). You can easily repeat this in a lab setup. I haven't tested ...
by MyThoughts
Mon Oct 20, 2008 5:01 pm
Forum: General
Topic: Simple Queue on Intel PC 3.14 problem
Replies: 4
Views: 946

Re: Simple Queue on Intel PC 3.14 problem

I have a very similar issue that has been occuring for some time. I too posted about it and the only follow up was a fellow user having similar issues as well. http://forum.mikrotik.com/viewtopic.php?f=2&t=26463 Check the 'Total Statistics' Total Avg Rate for the queue and see if the data rate is co...
by MyThoughts
Fri Oct 17, 2008 5:03 pm
Forum: General
Topic: per traffic load balancing
Replies: 2
Views: 932

Re: per traffic load balancing

Not all traffic is capable of being managed in this manner. For it to work correctly the target ports must not change or if they do you must be sure you are 'capturing' all the traffic in the mangle rules. I noticed that you are using a UDP port range for the VOIP traffic, however most VOIP protocol...
by MyThoughts
Thu Oct 02, 2008 4:25 pm
Forum: General
Topic: Single-Link MLPPP
Replies: 7
Views: 3235

Re: Single-Link MLPPP

MLPPP is used to log into your ISP across multiple DSL modems or one modem for Single Link MLPPP, your ISP must have MLPPP support on their servers for it to work. Effectivly you log in once but traffic is divided equally across the interfaces specified. So in general to perform MLPPP you need: ISP ...
by MyThoughts
Sat Sep 20, 2008 4:57 am
Forum: Wireless Networking
Topic: Hardware Retries
Replies: 3
Views: 4798

Re: Hardware Retries

The settings on the AP/CPE are independant of eachother and can be tuned on an individual basis to provide the best results overall for your customers. I recommend reading this, http://wiki.mikrotik.com/wiki/Wireless_FAQ , to better understand how RouterOS handles all the different settings. I been ...
by MyThoughts
Tue Sep 09, 2008 10:27 pm
Forum: General
Topic: Bypass Simple Queue?
Replies: 3
Views: 1889

Bypass Simple Queue?

I am having a problem with for some reason simple queues not working correctly. I have approx 320 simple queues, all with varying attributes. I have chosen this method above all others for numerous reason so please don't just tell me to use PCQ, PPPoE, PPTP, or anything else. Basicly what happens is...
by MyThoughts
Tue Aug 26, 2008 5:05 pm
Forum: Wireless Networking
Topic: Experiencing problems with RB600 and senao clients
Replies: 3
Views: 1059

Re: Experiencing problems with RB600 and senao clients

To the OP: Are the 200 mW Senao client using Prism chipsets? (my feeling is yes, all Senao 200 mW cards i've seen have been Prism based) Is the radio card in the RB600 based on an Atheros chipset by any chance? (I'm assuming it is) There has been reliability issues with the Atheros based cards talki...
by MyThoughts
Mon Aug 11, 2008 2:24 pm
Forum: Scripting
Topic: Clearing Global Variables?
Replies: 0
Views: 758

Clearing Global Variables?

I just upgraded one of my routers to v3.11 and was working of updating some old scripts. The problem is during my work I found I couldn't seem to clear the global variables. I realize that v3.x changed the way you unset/clear variables, but this is what I did, what am I doing wrong? example... [admi...
by MyThoughts
Thu Jul 24, 2008 5:29 pm
Forum: Wireless Networking
Topic: Routerboard won't use higher data rates
Replies: 7
Views: 1574

Re: Routerboard won't use higher data rates

The client/ap will not use the higher dates rates unless they are necessary to use. Also SNR is not very helpful. I have numerous radio card that report noise floor at better then -105, a signal of -75 would then equate to a 30 SNR but the radio would not use 54 Mbps. Again there is always the possi...
by MyThoughts
Sat Jul 05, 2008 5:00 pm
Forum: Wireless Networking
Topic: 5GHz mode vs 5GHz-5Hz mode
Replies: 1
Views: 1066

Re: 5GHz mode vs 5GHz-5Hz mode

Whenever using 5MHz channels the signal should be about 6-9 dB better then 20 MHz channels. Your speed would of course drop as a result of the lower bandwidth, I typically see ~5-7 Mbps TCP half-duplex with 5GHz-5MHz channel sizes. HOWEVER, the 5GHz-5MHz channel is very very problematic for most car...
by MyThoughts
Sat Jun 21, 2008 6:45 pm
Forum: Wireless Networking
Topic: poor upload (horrible upload) (incl. screenshot)
Replies: 12
Views: 2048

Re: poor upload (horrible upload) (incl. screenshot)

I have had this issue, clients able to download 4 Mbps TCP, but upload is only 0.35 Mbps. This was using 48Mbps Airrate on 2.4 ghz, 5Mhz channel sizes, with 3 x 120 degrees sectors operating at 2417, 2447, 2472 MHz. This is most likely a CSMA back-off issue, your clients are directed at you tower (i...
by MyThoughts
Wed May 28, 2008 6:45 pm
Forum: Wireless Networking
Topic: bonding vs NStreme2
Replies: 3
Views: 1958

Re: bonding vs NStreme2

From my experience Nstreme2 will be much faster then bonding, however as mentioned earlier Nstreme2 has absolutely no failover. To answer the question on stability though, in all my Nstreme2 and Nsteme deployments they have been substainally less stable then a non-nstreme link. I could never explain...
by MyThoughts
Tue May 20, 2008 10:04 pm
Forum: RouterBOARD hardware
Topic: RB133c upgraded and crashed.
Replies: 10
Views: 2308

Re: RB133c upgraded and crashed.

This is a common problem, and as far as I know it has not been acknowledged. I've upgraded over 100 x RB133C and RB133C3's to v3.x all running as wireless CPE's, if you don't touch the units (ie. log into them via console, ssh, or winbox) they operate for the most part OK at just passing traffic. BU...
by MyThoughts
Sat Mar 22, 2008 3:18 am
Forum: Wireless Networking
Topic: Nstreme dual easy question
Replies: 3
Views: 950

Re: Nstreme dual easy question

RouterOS doesn't really care what antenna's you use, but you need 2 radios in one unit at each end to do Nstreme2. Having a single dual-polarity antenna gives you the advantage for easy of install and alignment, but limits you in that you have absolutely no physical seperation. I have done this in m...
by MyThoughts
Fri Mar 21, 2008 10:38 pm
Forum: Wireless Networking
Topic: Why the ping go hight to 1500 ms and dorp to 1 ms
Replies: 2
Views: 900

Re: Why the ping go hight to 1500 ms and dorp to 1 ms

When you saturate any type of communication link the ping/repsonse times will increase accordingly. If you link is capable of 13 Mbps and you use all that bandwidth the ping times should incease alot, and if you over-saturate the link you'll see timeouts. This can also be caused by interference as w...
by MyThoughts
Sun Feb 10, 2008 3:12 am
Forum: Wireless Networking
Topic: Cable lenght on 5GHz links
Replies: 24
Views: 4779

Re: Cable lenght on 5GHz links

I currently use ~6m of LMR 400 to feed a couple of my backhaul 5 GHz units with no issues.
A well made cable of that length should have a max loss of ~3.5 dB including connector losses.

Cheers
by MyThoughts
Wed Jan 23, 2008 6:30 am
Forum: Wireless Networking
Topic: Why a faster CPU?
Replies: 1
Views: 763

Why a faster CPU?

I have found many posts talking about the need of a very powerful CPU to achieve higher data rates using wireless (both for 2.4 GHz and 5.8 GHz), I am a bit confused by this. I do understand when you introduce Nstreme why a faster CPU is needed, however I do not use Nstreme. Currently I use alot of ...
by MyThoughts
Tue Aug 14, 2007 4:38 pm
Forum: Wireless Networking
Topic: hw-retries for wireless
Replies: 10
Views: 7271

hw-retries for wireless

RouterOS v2.9.45 implemented a new hw-retries setting for wireless cards, but I cannot find a status on how many have actually occured. I believe it would be of use to be able to see a total number of hw-retries, and/or the number of hw-retries that the last trasmission required. Is there a way to v...
by MyThoughts
Mon Aug 13, 2007 3:42 pm
Forum: RouterBOARD hardware
Topic: RB192 and RB333
Replies: 67
Views: 11390

Re: RB192 and RB333

Very interesting product. Can't wait to see the benchmarks.
One question I have...

Regarding the Tripleshot MPCI slots, are they raised enough to accommodate more then one XR card?
by MyThoughts
Mon Jul 30, 2007 3:46 pm
Forum: Wireless Networking
Topic: Failing Cards
Replies: 11
Views: 1101

Re: Failing Cards

Inreply to cmacneill's comment on the rough vs. smooth surface, I would absolutely agree with him. Smooth surfaces tend to have laminar flow over the surface, this will still create a static buildup but it will not be concentrated at any particular point. A rough surface on the other hand will have ...
by MyThoughts
Sun Jul 29, 2007 12:42 am
Forum: General
Topic: Strange Winbox Logins
Replies: 6
Views: 1421

Re: Strange Winbox Logins

The Dude does login to the units to retrieve info on them, and if you have that network element set to Mikrotik RouterOS I would assume it would access it through the standard winbox port, not using winbox but just the port. I have seen this a few times on some of my network devices, and it was the ...
by MyThoughts
Sun Jul 29, 2007 12:16 am
Forum: Wireless Networking
Topic: Failing Cards
Replies: 11
Views: 1101

Re: Failing Cards

I've lost about 9 cards, all between 2 different sites. 5 CM9s 3 SR2s 1 NMP-8602 Interesting enough all these sites had 2 radios in the same RB532, one running a backhaul connection the other the omni. I have only lost cards that were powering the omni antenna and have never the card powering the ot...
by MyThoughts
Sat Jul 28, 2007 3:29 pm
Forum: Wireless Networking
Topic: Failing Cards
Replies: 11
Views: 1101

Re: Failing Cards

Your problem sounds like the TX side of the card is working correctly but the reciever is blown/damaged. If you setup a small lab to test the cards, I believe you will find that they do in fact 'work', just not correctly. If this is your problem... after setting up two test units (one with a good kn...
by MyThoughts
Thu Jul 26, 2007 2:17 pm
Forum: Wireless Networking
Topic: rx -54 , 5.5mbps ; no rx !
Replies: 3
Views: 671

Re: rx -54 , 5.5mbps ; no rx !

In RouterOS you have the ability to see the rx/tx signal levels, however I far as I know this only works if both the AP and the client are RouterOS. This makes sense in the fact that there really is no possible way to know how well a AP is getting your transmission unless it reports back. You can se...
by MyThoughts
Wed Jul 25, 2007 3:00 pm
Forum: Wireless Networking
Topic: does any one known why I'm getting low speed?
Replies: 4
Views: 602

Re: does any one known why I'm getting low speed?

If you have your data rates left at 'default' setting, RouterOS will pick the data rate that corresponds with the amount of traffic passing on the link. If its connected with 802.11g, you will see 6, 9, 12, 18, 24, 36, 48, 54 Mbps as possibilities. If you are just connected and not really doing anyt...
by MyThoughts
Tue Jul 24, 2007 2:37 pm
Forum: General
Topic: Strange Winbox Logins
Replies: 6
Views: 1421

Re: Strange Winbox Logins

Are the devices internal, or reachable from the public internet? Are you using the Dude to monitor your system? If you add a new user named something else and remove the default 'admin' user does the message change at all? For better security add a PPTP setup to the box, and setup a firewall filter ...
by MyThoughts
Tue Jul 24, 2007 2:27 pm
Forum: Wireless Networking
Topic: does any one known why I'm getting low speed?
Replies: 4
Views: 602

Re: does any one known why I'm getting low speed?

When you say only getting 18 Mbps speed, are you referring to the air data rate, or are you getting 18 Mbps (TCP/UDP) true throughput using a bandwidth test, or a file transfer, etc.? The reason I ask is because if your getting 18 Mbps true throughput then that is the best you can hope for in that c...
by MyThoughts
Sat Jul 14, 2007 3:47 pm
Forum: Wireless Networking
Topic: SR9 on 2442? WTF
Replies: 3
Views: 788

Re: SR9 on 2442? WTF

Becuase of the limited size of the non-licensed 900 MHz spectrum (902-928 MHz), you don't have alot of room to move, as a result the smaller the channel size the higher the potential for 'harmful' interference. I have had the same problem at a site I use 900MHz, periodically when using 5MHz channels...
by MyThoughts
Wed Jul 11, 2007 3:49 pm
Forum: Wireless Networking
Topic: Atheros client re-association problem revisited
Replies: 65
Views: 7374

Re: Atheros client re-association problem revisited

For myself I have experienced odd issues like this in the past. My observations were: NSTREME preforms worse if the noise is higher in the area. Especially in PtMP enviroments. Almost all of my odd issues like yours have been a result of outside influence, stong background noise, etc. Something I ha...
by MyThoughts
Fri Jun 29, 2007 4:39 pm
Forum: RouterBOARD hardware
Topic: RoterBoard 44
Replies: 3
Views: 1160

Re: RoterBoard 44

I use the RB44 on a AMD Sempron 2600+ with a VIA based shipset with no issues.
Of note however is the RB44 does not work at all on a VIA EPIA EN12000EG with RouterOS.
by MyThoughts
Wed May 02, 2007 2:50 am
Forum: Wireless Networking
Topic: Blown xr5?! -----
Replies: 4
Views: 956

I have a been running RB532a with XR5 and SR9 with PoE (48V @ 400mA) for about 3 weeks now, so far no issues.

What else did you try the XR5 and SR9 in to check if they were functioning? (I am assuming by not working that you meant that they didn't show up in the interfaces on RouterOS)
by MyThoughts
Sat Apr 21, 2007 10:34 pm
Forum: Wireless Networking
Topic: Near channel interferance with 2 cards on same router board
Replies: 9
Views: 1600

Please see these posts, they have more information regarding this topic:

http://forum.mikrotik.com/viewtopic.php?t=8139
http://forum.mikrotik.com/viewtopic.php?t=13668
by MyThoughts
Mon Apr 16, 2007 4:16 pm
Forum: Wireless Networking
Topic: Nstreme - looking for sucess stories
Replies: 9
Views: 1798

5ghz NSTREME, approx. 2.6 km -76 tx, -76 rx
pings 3ms - 9ms
16 mbps TCP SR5

I have not had much luck with NSTREME in PtMP enviroments, due mainly to noise issues.

Compression cannot be enabled with encryption.
by MyThoughts
Fri Mar 23, 2007 2:07 am
Forum: Wireless Networking
Topic: RB112 + SR2 + 15db omni +48v POE .4a = bad pinging
Replies: 33
Views: 5230

Unless there is a new revision of SR2 i haven't seen, then the U.Fl connector on the SR2 is ant-a setting in RouterOS
by MyThoughts
Sat Mar 17, 2007 7:08 am
Forum: Wireless Networking
Topic: 60km running 5ghz-10mhz - bandwidth question
Replies: 10
Views: 2080

Seems to me if your getting 8 Mbps across 60km with 5Ghz-10Mhz with a signal of -70 both directions while locked at an air rate of 36 Mbps, then its running as it should.
by MyThoughts
Thu Mar 08, 2007 10:22 pm
Forum: Wireless Networking
Topic: SR2 weaker than Senao 200mw cardbus
Replies: 7
Views: 1532

What type of pigtail cable are you using?

If you are using MMCX then be sure you have RouterOS set to Ant B, if it is a U.Fl make sure it is set to Ant A.
by MyThoughts
Mon Feb 12, 2007 3:46 am
Forum: General
Topic: Assign DNS via PPTP (RouterOS to RouterOS)
Replies: 0
Views: 510

Assign DNS via PPTP (RouterOS to RouterOS)

When you configure a pptp profile in RouterOS, it allows you to specify DNS Server addresses, and if the remote connecting is for example WinXP those servers are assigned properly. However, if the remote client is connecting is RouterOS, there is no option of 'Use Peer DNS' like in the PPPoE client....
by MyThoughts
Fri Feb 02, 2007 7:23 pm
Forum: Wireless Networking
Topic: MT v3.0b5 - CSMA Disable Throughput Data
Replies: 14
Views: 12738

This post is solely to do with the Disable CSMA option in RouterOS v3, you cannot activate the disable CSMA option unless you use Nstreme. This is why all the tests were completed with Nstreme on.
by MyThoughts
Fri Feb 02, 2007 7:07 am
Forum: Wireless Networking
Topic: MT v3.0b5 - CSMA Disable Throughput Data
Replies: 14
Views: 12738

MT v3.0b5 - CSMA Disable Throughput Data

I have recently completed a round of tests to find out if the CSMA Disable function in v3.0b5 actually helps with throughput when multiple transmitters are active at the same time. My purpose is not to solve the 'noisy-enviroment' issue but to solve problems associated with radios that can 'hear' ea...
by MyThoughts
Mon Jan 29, 2007 4:11 pm
Forum: General
Topic: routed wlan and pppoe?
Replies: 9
Views: 1779

PPPoE operates on the MAC address level (layer 2), so that is why you need to use WDS (or a different transparent bridging technique). PPTP operates on the IP address level (layer 3), this is why you can use PPTP on a routed network and a bridged network. PPTP, works on both routed, and bridged netw...
by MyThoughts
Sun Jan 28, 2007 5:24 pm
Forum: Wireless Networking
Topic: Retransmits?
Replies: 0
Views: 516

Retransmits?

Is there a way to look at the number of retransmits on a wireless interface?

Or the number of packets good/dropped on rx and tx?
by MyThoughts
Fri Jan 26, 2007 5:04 pm
Forum: Wireless Networking
Topic: sr9 and client distance
Replies: 26
Views: 3614

Cell phones and cell phone carrier class equipment have RX sensitivities of around -114 to -120 dB.

Atheros extended range enables rx sensitivities of around -120 dB on supported cards however RouterOS does not support this feature YET :)
by MyThoughts
Tue Jan 23, 2007 7:40 am
Forum: General
Topic: More additions to the connect list would be helpful
Replies: 2
Views: 1244

More additions to the connect list would be helpful

I really like the additions made to v3 of RouterOS thus far. However one major drawback I am finding is in the connect list features. I currently operate many of my APs using 2.4 Ghz - 5mhz channels, however as I could also operate at 10mhz, 20 mhz, turbo, nstreme, etc., it makes it a pain to change...
by MyThoughts
Mon Jan 22, 2007 6:57 pm
Forum: General
Topic: Netflow... or something similar
Replies: 2
Views: 610

Excellent, I'll give it a try... I can't believe I missed that though

Thanks Again
by MyThoughts
Mon Jan 22, 2007 7:45 am
Forum: General
Topic: routed wlan and pppoe?
Replies: 9
Views: 1779

My entire wireless network is composed or RouterOS, and I understand your concern about bridging. When I started I was using a simple WDS solution with PPPoE. However I was not satisfied with the performcance of the wireless when working with WDS and bridges. I very soon reworked the entire network ...
by MyThoughts
Mon Jan 22, 2007 5:08 am
Forum: General
Topic: Netflow... or something similar
Replies: 2
Views: 610

Netflow... or something similar

I am currently monitoring my entire network with the Dude software. I find it is a great sofware for monitoring, but I am looking for a bit more in the area of network analysis. Netflow is a package that has a lot of the features I am looking for, but it only works with some routers. Is there any so...
by MyThoughts
Sat Jan 20, 2007 11:07 am
Forum: Wireless Networking
Topic: Throughput drop with more (inactive) clients
Replies: 0
Views: 538

Throughput drop with more (inactive) clients

I have been experiencing some fairly large speed decreases on one of my APs. Currently its operating at 2.4Ghz-10mhz (radios locked at 24Mbs Max) If only one client is connected to the AP, I get around 6.7Mbps However if I allow the other 12 clients to connect the speed drops to around 1.2 Mbps on a...
by MyThoughts
Wed Dec 27, 2006 8:55 pm
Forum: Wireless Networking
Topic: disconnects w/ good signal?
Replies: 36
Views: 5642

ldvaden, I am not disagreeing with what you said. Microwave should indeed dissipate very quickly in a typical house, if it didn't we would have major issues. Every object on earth does have some degree of microwave absorbtion and even a metallic object is not a perfect reflector. My comments are bas...
by MyThoughts
Mon Dec 25, 2006 6:04 am
Forum: Wireless Networking
Topic: disconnects w/ good signal?
Replies: 36
Views: 5642

You contributed nothing to this forum discussion. I am trying to help someone workthough a problem they have been having. As you have a physics and math background you should understand that there is no easy calcuation for exact microwave energy dissipation. It is a per site type of calulation with ...
by MyThoughts
Wed Nov 22, 2006 11:15 pm
Forum: RouterBOARD hardware
Topic: PoE Disable on RB112
Replies: 3
Views: 1707

POE-48 Injector from PacWireless, I know its not made by them, but you can see the specs for it there.
by MyThoughts
Mon Nov 20, 2006 6:02 pm
Forum: RouterBOARD hardware
Topic: PoE Disable on RB112
Replies: 3
Views: 1707

PoE Disable on RB112

Currenty my company uses standard PoE 802.3af compliant injectors to power all our RB112s. However, we have noticed issues on some boards. We plug the ethernet in and the unit continually reboots. I connected via RS232 to see what was happening and the router reboots right after loading the boot loa...
by MyThoughts
Sun Oct 22, 2006 8:32 pm
Forum: Wireless Networking
Topic: VirtualAP an performance?
Replies: 6
Views: 1116

I have created an AP that has 4 VAPs on on interface. I have not noticed any major difference between connecting the directly the main AP or through a VAP. In one case I actually had a increase in performance but this was due to being able to bypass alot of rules that didn't need to be applied and n...
by MyThoughts
Fri Oct 20, 2006 8:17 pm
Forum: Wireless Networking
Topic: rb112 to rb112 wds, upload 12 mbita/download 4 mbita
Replies: 5
Views: 1121

The speeds should be roughly the same in each direction unless something if occuring in only one direction.
by MyThoughts
Fri Oct 20, 2006 8:16 pm
Forum: Wireless Networking
Topic: disconnects w/ good signal?
Replies: 36
Views: 5642

My 'garbage' is easily proven. Take a spectrum analyzer, a few wireless devices, an AP, put them in a some completely RF sealed room and watch what happens on the SA. Just because I used a 'real world' example does not mean I didn't look at the science behind it. This is not really a multipath probl...
by MyThoughts
Fri Oct 20, 2006 1:03 am
Forum: Wireless Networking
Topic: r52 vs sr5 on 10mhz channels
Replies: 8
Views: 1771

I have done extensive testing in the 2.4ghz range comparing the EMP-8602, and the SR2 cards, on small channels. When it came to CDMA backoff, speeds, and interference I was unable to find any 'real world' differences. This was to my surprise as I was hoping that moving the the 6th gen atheros would ...
by MyThoughts
Wed Oct 18, 2006 7:04 pm
Forum: Wireless Networking
Topic: high CRC error count when rates over 24 mbit enabled
Replies: 2
Views: 899

All my APs are locked down at 24 as well, same reasons, I have a couple backhaul (ie. very directional 2.4ghz, and 5.8ghz ant) links running at 54mbit but I have trouble past 4 miles maintaining a 54mbit link due to interference in my area.
by MyThoughts
Mon Oct 16, 2006 10:23 pm
Forum: Wireless Networking
Topic: RB-532 and RB-564 random time reset or freezing
Replies: 2
Views: 700

I've had 2 x RB532s that were rebooting themselves with no cards installed after 2-5 min. There were both DOA, it was not watchdog or my PoE, check your boards. When using the terminal it would report hundreds of poweroutages in only a few days.
by MyThoughts
Wed Oct 11, 2006 8:05 pm
Forum: Wireless Networking
Topic: Bandwidth problem when using 3 Wireless interfaceses
Replies: 3
Views: 919

See my reply to a similar issue: http://forum.mikrotik.com/viewtopic.php?t=8139 This is the problem you are having and it can easily be repeated in a lab setup. To solve you problem the cards need to be shielded for each other (ie. all cards need to be in different boxes or you need to design a meta...
by MyThoughts
Tue Oct 10, 2006 8:40 pm
Forum: Wireless Networking
Topic: Is my signal too strong ?
Replies: 3
Views: 1059

What is the ack timeout on the links? Does the link have LOS or are there obstructions? When bandwidth testing are you going through the unit or is the units themselves generating the packets. Are there any other 5ghz equip around? Does the box running the link have 2 radios in it? (is so what frequ...
by MyThoughts
Tue Oct 10, 2006 8:31 pm
Forum: Wireless Networking
Topic: Power output for Senao NMP-8602
Replies: 39
Views: 13194

I have the exact same issue, and I have mentioned it in the forums before.
On RB532s, NMP-8602s reboot the board continously when set to any 5ghz band. BUT they work fine when set to 2.4 ghz.
by MyThoughts
Fri Oct 06, 2006 5:32 pm
Forum: Wireless Networking
Topic: Multiple frequencies and bad performances
Replies: 19
Views: 5898

This is the 'friendly' backoff function of the CDMA protocol that uses in wireless 802.11a,b,g standards. If the radios are colocated ie. 2 radios in one box both operating of the 2.4ghz frequencies you need as much seperation as possible both by frequency and by antenna. I have documented this case...
by MyThoughts
Sat Sep 30, 2006 9:15 pm
Forum: RouterBOARD hardware
Topic: terrible tx/rx speeds
Replies: 9
Views: 3302

Lock the SR5's at a max of 24Mbps (thats the fastest speed you can get when at the highest tx power). Clear line of sight is much more important in 5.8Ghz then 2.4Ghz Eg. I just upgraded a 2.4Ghz backhaul to 5.8Ghz I was using SR2 to SR2, with 24dBi grids, I was getting -54 tx/rx Now it is SR5 to SR...
by MyThoughts
Sat Sep 30, 2006 8:56 pm
Forum: The Dude
Topic: Outage Problem
Replies: 3
Views: 1652

If it is RB532s or RB112 I have had problems in that sometimes during brownouts or power flickers the devices go into "lala" land, they are still connected to the AP, and they respond to ping from the AP, but not anything past the AP. They require a manual reboot, software reboot reports back with a...
by MyThoughts
Tue Sep 26, 2006 10:27 pm
Forum: RouterBOARD hardware
Topic: Unresponsive RB112s and RB532s
Replies: 3
Views: 1586

Its completely random, sometimes it happens after a couple days, sometimes earlier, sometimes later. However, where I live the power grid is terrible, low voltage issues, and brownouts. I was leaning towards that as the cause. Without battery backups in place it is very rare not to see at least one ...
by MyThoughts
Tue Sep 26, 2006 5:20 pm
Forum: RouterBOARD hardware
Topic: Unresponsive RB112s and RB532s
Replies: 3
Views: 1586

Unresponsive RB112s and RB532s

I have approx 15 RB532s and 70 RB112s I am using in my current wireless network. Sometimes a unit (almost always a CPE) goes unresponsive. What I mean is, according to the access point its connected, from the AP I can mac-ping and ip-ping, I can even mac-telnet most of the time. However I cannot pin...
by MyThoughts
Fri Sep 22, 2006 4:39 am
Forum: Wireless Networking
Topic: Support for 802.11n
Replies: 13
Views: 2770

If you followed any pre-802.11n testing you would find its not going to achieve those data rates. In fact most pre-802.11n equipment in practice (not theoretical) can barely better if at all better then the current wireless standards. Mikrotik should not waste effort in adding 'standards' that are n...
by MyThoughts
Wed Sep 20, 2006 7:49 pm
Forum: Wireless Networking
Topic: disconnects w/ good signal?
Replies: 36
Views: 5642

The RB112 can easily provide enough power for a single SR2, SR5, SR9, and NMP-8602+ And there has been known issues with some NMP-8602+ and RB532s, just search the forums. I have for example had NMP-8602's that causes an RB532 to reboot whenever its at 5ghz but they work fine in RB112s. As a rule I ...
by MyThoughts
Wed Sep 20, 2006 7:16 pm
Forum: Wireless Networking
Topic: nstreme2 and WPA-encryption possible?
Replies: 5
Views: 1311

I use Nstreme2 with WPA2 encyrption.
To encrypt you just set the security profile in the wireless device settings.
I believe you can actually set 2 different encryption profiles, one for rx, and one for tx if you so desired.
by MyThoughts
Tue Sep 12, 2006 5:33 pm
Forum: Wireless Networking
Topic: 900mhz & nlos
Replies: 8
Views: 1830

Bending the radio waves is a trick but it only works for a few degrees, ie. light bends ever so slightly when hitting a sharp edge.
Bending radio waves around a large obstacle is really not possible.
However 'sometimes' and this is rare you can get lucky and bounce the signal off the atmosphere.
by MyThoughts
Mon Sep 11, 2006 2:10 am
Forum: Wireless Networking
Topic: Retransmits or Dropped Packets?
Replies: 1
Views: 779

Retransmits or Dropped Packets?

I am having problem with a PtP link, each end is is using 24dBi Grids signal strength is -74 on both tx/rx, ping time is decent around 8 ms. I am currently using 10 mhz channels witht the radio locked to 24Mbps Speed is jumping around alot, sometimes I get 4.4 Mbps TCP, other times I only get 400 kb...
by MyThoughts
Fri Sep 08, 2006 10:47 pm
Forum: RouterBOARD hardware
Topic: RB112 Watchdog Broken?
Replies: 10
Views: 3734

yes i have seen this many times, when using the emp/nmp-8602 mpci card.

try a different/no card to see if the problem still persists.
by MyThoughts
Wed Sep 06, 2006 10:41 pm
Forum: Wireless Networking
Topic: <pppoe-joe>: terminating...- user joe is already activ
Replies: 2
Views: 701

Depending on the timeout settings in your PPPoE profile and the timeout of the client devices this can happen. I have seen this once or twice and i tracked it down to this: Client connection to tower dropped for a short period, the CPE lost PPPoE connection but beucase the client came back up before...
by MyThoughts
Tue Sep 05, 2006 4:20 pm
Forum: Wireless Networking
Topic: Nstreme Dual Questions?
Replies: 18
Views: 3255

Nstreme Dual Questions?

Before I go switching one of my PtP link to nstreme dual I had a few questions: 1. Does the tx/rx-frequency have to match at both ends or does the rx interface automatically follow the tx host? 2. What is the best way to fail-over to one interface if the other fails, is it built in? or do you need t...
by MyThoughts
Sun Sep 03, 2006 5:27 pm
Forum: Wireless Networking
Topic: Poor PPTP performance across bonded links
Replies: 1
Views: 696

Poor PPTP performance across bonded links

I have been running a wireless bonded link for about 4 months. However, with my recent change from a PPPoE/WDS Bridged to a PPTP/Routed network the bonding link is causes major speed problems. If I bandwidth-test through the bonded link directly (no tunnels) everything operates as it should, if I ho...
by MyThoughts
Fri Sep 01, 2006 12:32 am
Forum: Wireless Networking
Topic: 2.4 vs 5ghz - trees
Replies: 4
Views: 3938

Rule of thumb: The lower the frequency the better the penetration thus 900 Mhz > 2.4 Ghz > 5 Ghz when trees are involved Although there is much more technical detail I could go into, a simple answer is 2.4 is going to be better through trees. As a side note: Personally I have noted on many occasions...
by MyThoughts
Thu Aug 24, 2006 6:02 pm
Forum: General
Topic: Assigning Routes to PPTP Client?
Replies: 21
Views: 58007

PPP routes under the secret menu does nothing at all for the client, it adds routes to the server.

This was noted in the original question.
by MyThoughts
Wed Aug 23, 2006 7:55 pm
Forum: General
Topic: Assigning Routes to PPTP Client?
Replies: 21
Views: 58007

Thanks for the info guys. I figured it couldn't be done the way I liked.

Currently using RIP.

Thanks again
by MyThoughts
Wed Aug 23, 2006 6:39 pm
Forum: General
Topic: Assigning Routes to PPTP Client?
Replies: 21
Views: 58007

Assigning Routes to PPTP Client?

I am adding a new administation/monitoring system to my network. The new computer is connected to a Mikrotik router, that is in turn connected to another Mikrotik router via wireless, that is in turn connected to the master router of my network. eg. Computer ---> Router A ---> Router B ---> Master R...
by MyThoughts
Tue Aug 22, 2006 10:58 pm
Forum: Wireless Networking
Topic: Wireless links with Eratic Ping Times
Replies: 12
Views: 2055

In my experience this can be caused by interference. Trees in the path even if its close with excellent signal. If the signal strength is too high (ie. overloading the receiver) 'Noisy' enviroment The high ping times are probably retransmits. Things to try: A different channel Check the ack timeout ...
by MyThoughts
Mon Aug 21, 2006 4:44 pm
Forum: Wireless Networking
Topic: 240km link , any suggestions?
Replies: 64
Views: 13349

Distance wise I have no practical experience, however water can add a very unpredictable element to the setup. In my experience keeping the as much as the signal away from water is key. So that means as small as a frensel zone as you can manage. Small Frensel Zone = High frequency I'd test high the ...
by MyThoughts
Sun Aug 20, 2006 11:58 pm
Forum: Wireless Networking
Topic: DNS Server Issues
Replies: 11
Views: 2105

This is not an MTU setting problem. I have already worked with MTU setting when getting hotmail to load correctly. I did test to see if this was related to MTU originally when the problem appeared. I tried increments of 25 from 1200 to 1400, and increments of 10 from 1400 to 1500. It had no affect o...
by MyThoughts
Sat Aug 19, 2006 11:00 am
Forum: Wireless Networking
Topic: DNS Server Issues
Replies: 11
Views: 2105

Unfortunately the network is fairly large and we recently switch from PPPoE authentication to PPTP authentication on the CPE devices (went from bridged network to a routed one). This makes it take a very long time to switch over CPE equipment to different settings (PPTP client doesn't have any optio...
by MyThoughts
Sat Aug 19, 2006 12:09 am
Forum: Wireless Networking
Topic: DNS Server Issues
Replies: 11
Views: 2105

DNS Server Issues

I currently operate an all Mikrotik wireless network. Recently I started noticing issues when loading certain websites. I have isolated the problem and it is associated with the DNS server. When a client asks for a dns resolution it first asks the CPE, the CPE then asks the server and the server in ...
by MyThoughts
Sat Aug 12, 2006 6:14 pm
Forum: Wireless Networking
Topic: Certain Websites Slow/Not working
Replies: 2
Views: 1217

Certain Websites Slow/Not working

I run a large wireless network completly based on mikrotik. Recently (2-3 weeks ago), certain website do not load or are very slow. To name a few: Pretty much all ebay related sites (eg. http://www.ebay.de), also the yahoo sites (eg. http://www.yahoo.com), etrade, and numerous others. Speed tests ar...
by MyThoughts
Wed Aug 09, 2006 7:49 am
Forum: Wireless Networking
Topic: PPTP over Bonded Wireless Link?
Replies: 2
Views: 673

1st RB532 WLAN1 - bridge mode, static WDS WLAN2 - bridge mode, static WDS Bonding interface - includes both static WDS entries, balance rr, arp link monitoring Bridge - includes ether1, and bonding interface 2nd RB532 WLAN1 - WDS slave mode, static WDS WLAN2 - WDS slave mode, static WDS Bonding inte...
by MyThoughts
Tue Aug 08, 2006 1:39 pm
Forum: Wireless Networking
Topic: PPTP over Bonded Wireless Link?
Replies: 2
Views: 673

PPTP over Bonded Wireless Link?

I am currently in the process of switching part of our network over from a Bridged/WDS network to a Routed network. I currently at one location use a wireless bonded connection for greater thoughput, and fail-over. Across the bonded link I have various PPPoE connections all working fine on the bridg...
by MyThoughts
Thu Aug 03, 2006 5:19 pm
Forum: Wireless Networking
Topic: Wireless card recieve blows issue
Replies: 92
Views: 36490

I have been having this issue at a new AP I put up about 2 weeks ago. The site is using a 15dBi omni from Pasadena networks(don't know manufacturer). My other 9 APs are using a 15dBi omni from hyperlink (no issues), and the 1 other site is using a 15dBi omni from Pasadena networks. I have lost 3 rad...
by MyThoughts
Thu Aug 03, 2006 5:09 pm
Forum: Wireless Networking
Topic: RouterBOARD 230 and Wireless performance with 2 Cards
Replies: 3
Views: 1043

I have been doing similar testing on RB532s. RB532 ------> RB532 (Dual Card) ------> RB532 All links have excellent SNR, ACK, and CCQ rates. I can achieve >10 Mbps TCP to and from the centre repeater. But if I test end to end, I only get 5Mbps (bridging), (7 Mbps routed). CPU is not a problem, cpu u...
by MyThoughts
Thu Jul 27, 2006 11:38 pm
Forum: Wireless Networking
Topic: WTF Senaro problem?
Replies: 6
Views: 1099

Had the same problem on about 7 EMP/NMP-8602+ Router would reboot about 3-10s after booting up. After much testing the problem was found only to occur when the cards were set to 5Ghz and enabled. I program all my units via script, and I found I was enabling the wireless interface before actually pro...
by MyThoughts
Thu Jul 27, 2006 4:30 pm
Forum: Wireless Networking
Topic: Routed network speed
Replies: 0
Views: 426

Routed network speed

I currently have a very large bridge network, speeds to clients are not an issue for internet usage. However, I believe my speeds should be going faster. As such I am testing an experiemental setup all routed (no bridges). I setup a small experiment simulating a section of my actual network. I am us...
by MyThoughts
Tue Jul 25, 2006 12:08 am
Forum: Scripting
Topic: Get IP Address
Replies: 2
Views: 1379

Thanks for the help!

I ended up using something like this instead though,

:set CableIP [:pick [/ip address get [/ip address find interface="Cable"] address] 0 [:find [/ip address get [/ip address find interface="Cable"] address] "/"]]
by MyThoughts
Mon Jul 24, 2006 5:56 pm
Forum: Scripting
Topic: Get IP Address
Replies: 2
Views: 1379

Get IP Address

We just linked two offices together via wireless. Everything is going great, but I am trying to develop a failover script for the network. Office 1 has 2 WAN connections (one cable one dsl) Office 2 has 1 WAN connection (1 cable) I am currently load balancing at Office 1 using a similar setup to the...
by MyThoughts
Wed Jun 14, 2006 1:54 pm
Forum: RouterBOARD hardware
Topic: EMP-8602 Problems/Issues
Replies: 5
Views: 3155

EMP-8602 Problems/Issues

I have been using both Senao and Engenius EMP-8602 mpci cards since there release, and have not had any issues operating them in the 2.4ghz bands. However, while testing some equipment this past week I noticed problems with the RouterOS when operating any of the 5Ghz bands. Setup: RB532 minipci #1: ...
by MyThoughts
Fri May 12, 2006 12:54 am
Forum: RouterBOARD hardware
Topic: Request - Always boot from ethernet 1st
Replies: 2
Views: 1355

Request - Always boot from ethernet 1st

Currently we use RB112s, and RB532s accross our entire network. APs are RB532 and CPEs are now RB112. I have in the past week had to replace 3 CPE devices do to power outages during a RouterOS system upgrade. Of course my APs are all on battery backup, but I cannot convince or expect all customers t...
by MyThoughts
Sat Apr 22, 2006 4:47 pm
Forum: Wireless Networking
Topic: Dual radio repeater
Replies: 3
Views: 1250

If I understand you, you have

1 radio as backhaul link to main antenna
1 radio as AP for surrounding customers
Ether1 bridged because it has client connected to it

All three interface must be in a bridge together and the backhaul link must transparently bridge traffic properly. ie using EOIP or WDS.
by MyThoughts
Wed Mar 15, 2006 6:34 am
Forum: Wireless Networking
Topic: profssional wirless guys i need answer within 24Hrs
Replies: 7
Views: 1461

When it comes to distance there are many factors that come into play and it is a case by case analysis but generally speaking our tests and research have found that when comparing 802.11b with 802.11g the modulation used is very important. While 802.11b typically boasts better receive sensitivity an...
by MyThoughts
Fri Feb 10, 2006 6:37 pm
Forum: Wireless Networking
Topic: 5.8 links falling over - no beacons ?
Replies: 18
Views: 3653

I have been fighting with this problem in the 2.4GHz range for months. I get these random odd disconnects, on both my backhauls and on some of my clients. I've tried changing cards, frequencies, different antennas, I've double checked for moisture, or anything else that could explain this, but I hav...
by MyThoughts
Tue Jan 10, 2006 7:37 pm
Forum: Wireless Networking
Topic: 2.9.10 Problems (RB532 + CM9)
Replies: 2
Views: 1606

2.9.10 Problems (RB532 + CM9)

We recently upgraded all our Mikrotik boxes to 2.9.10, all of which were running 2.9.6 prior to the upgrade. Some problems have been introduced with the update that is causing major headaches for me and my customers. On nearly all of our Mikrotik boxes we are now having disconnect issues both on the...
by MyThoughts
Thu Dec 01, 2005 7:20 pm
Forum: Wireless Networking
Topic: Looking for reliability, SR2 or CM9???
Replies: 12
Views: 3443

We are currently using RB532 as both AP's and CPE, with both CM9 and SR2 cars. As far as stability is concerned we have had no issues with stability with either of the cards. However, we have had 3 CM9's fail after about a month in the field (3 of ~20), the cards didn't fail completely though, on 2 ...
by MyThoughts
Sat Nov 26, 2005 11:58 am
Forum: Wireless Networking
Topic: Portable WDS Setup
Replies: 4
Views: 1668

If I understand what your trying to do correctly, you should be able to use a AP Bridge, and WDS Slave combination. Using this method it is very easy to pre-configure all the router boards with a dynamic WDS style setup, thus making it very easy, and fast to deploy.
by MyThoughts
Thu Nov 17, 2005 10:46 pm
Forum: The Dude
Topic: Dude0.1b14 Background Image Bug?
Replies: 1
Views: 1572

Dude0.1b14 Background Image Bug?

I have created via stitching together satellite imagery a 3749x9631 pixel image of my town and want to use it as a background in The Dude. The image loads fine, and you can scroll around and look at the entire image with no problems, however you cannot move any of the vector based tools to the botto...