MikroTik

MyThoughts

@accarda The script method is something I tried, it does technically work. It was the timing issue that was tricky. The renewals only occur once every 2-3 months and they occur pretty quickly. I wanted to avoid using the Scheduler to continually run the script over and over on short time intervals. ...

MyThoughts

@mkx For services operating on the same ports (eg. 443) we use a reverse proxy to preform SNI I would not concerned with how RouterOS operates (selecting address from list) when a DST-NAT was using the suggested feature (address list for DST-NAT to address). For users wanting it to operate as a pseu...

MyThoughts

I think having an option for using an address list that could be used for DST-NAT (or SRC-NAT) would be very useful for improving the flexibility of the RouterOS firewall system. An Example: We have begun to automate many of our SSL server deployments, and we do have numerous deployments. Historical...

MyThoughts

I can also confirm this issue is plaguing us. Occurred after updating dude server and clients. We did not upgrade the dude client with the automatic update, we installed from the download. Running as admin does not make a difference. Spamming the connect will cause it to spontaneously being communic...

MyThoughts

600Mbps encrypted is really good from my 'homeowners' perspective running a wireguard between two 1 Gig connections 15km apart on the same network getting around 300Mbps up and 300Mbps down and your getting double that. Assuming you use internet from ISP1 at the main office and connect to all sites...

MyThoughts

We are working on a project where we have four sites we need to link together, in addition we want all internet and intranet traffic to route from all remote site through the main office internet connection. We have fiber to the premise at all the remote sites but the service uses PPPoE for login an...

MyThoughts

Just a followup - I had another location running a wAP 60Gx3 with a single client approx distance 230m, similar problem (huge number of disconnects, 200-300+ per day). This location however has the wAP mounted ~65 feet up on a tower and client side is ~23 feet up on top of the roof. RSSI is -52 and ...

MyThoughts

About two years ago we began testing 60 GHz equipment for PtMP deployments. During out testing phase we settled on max distance of 300m for residential client deployments. Any further and we had too many drops (we see a fair amount of heavy rain in the summer and snow in the winter). So these deploy...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

I ran into similar issues, turned out it was bad ram.

See http://forum.mikrotik.com/viewtopic.php ... 47#p376447

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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....

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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

Guess I'll have to wait for the recap.

MyThoughts

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...

MyThoughts

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...

MyThoughts

@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...

MyThoughts

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...

MyThoughts

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?

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

MyThoughts

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.

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

Cheers

MyThoughts

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...

MyThoughts

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,...

MyThoughts

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-...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

@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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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....

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

MyThoughts

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 ...

MyThoughts

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

MyThoughts

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

MyThoughts

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' ...

MyThoughts

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...

MyThoughts

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

MyThoughts

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

MyThoughts

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...

MyThoughts

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

MyThoughts

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. Howe...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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

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

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

Cheers

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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-...

MyThoughts

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...

MyThoughts

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

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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

Cheers

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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

Cheers

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

Cheers

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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 i...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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?

MyThoughts

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 ...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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.

MyThoughts

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)

MyThoughts

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

MyThoughts

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.

MyThoughts

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

MyThoughts

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.

MyThoughts

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.

MyThoughts

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....

MyThoughts

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.

MyThoughts

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...

MyThoughts

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...

MyThoughts

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?

MyThoughts

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

MyThoughts

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...

MyThoughts

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

Thanks Again

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

POE-48 Injector from PacWireless, I know its not made by them, but you can see the specs for it there.

MyThoughts

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...

MyThoughts

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...

MyThoughts

The speeds should be roughly the same in each direction unless something if occuring in only one direction.

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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.

MyThoughts

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.

MyThoughts

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...

MyThoughts

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...

MyThoughts

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.

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 b...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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.

MyThoughts

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.

MyThoughts

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...

MyThoughts

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.

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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.

MyThoughts

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

Currently using RIP.

Thanks again

MyThoughts

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...

MyThoughts

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 ...

MyThoughts

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 ...

MyThoughts

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...

MyThoughts

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...

MyThoughts

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 ...

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