Community discussions

Search found 55 matches

by Tbird
Mon Feb 17, 2014 11:36 am
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

Not any AC specific "AC antenna" - didn't say that, but many users are not aware of the importance of Port to Port isolation for good MIMO performance. With AC and 256QAM, its even more important. Flashnet in Austria (WISP) have done a lot of testing on AC, and can probably provide more on hard fact...
by Tbird
Sat Feb 15, 2014 11:01 pm
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

Tested in lab with RFC2544 tester and in "real life" - though the lab guys also consider themselves living in real life 8) Like I've pointed out in AC-discussions before, good antenna spec is critical - we use 25dBi with integrated alu enclosure - and better than -45dB port to port isolation. This i...
by Tbird
Sat Feb 15, 2014 11:26 am
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

We have been running AC for 7 months now, with superb stability and performance. Don't know about UBNT performance for AC, but we see even better performance than what you indicate: 150 Mbps at 20MHz, 300 Mbps at 40MHz and 620 Mbps at 80MHz. Tested with both RFC2544 tester and Mtik BW-test. I know F...
by Tbird
Mon Feb 10, 2014 9:25 pm
Forum: Wireless Networking
Topic: Mikro Tik - login system with radius server
Replies: 1
Views: 762

Re: Mikro Tik - login system with radius server

Enable login by Cookie
by Tbird
Sat Jan 25, 2014 12:41 am
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

Yeah, grate write-up by Cisco - we are definitely still learning here! Totally agree - 100 CPEs is not realistic at all, and these simulations probably don't consider much frame-loss and retransmitting that will occur in the wild - causing scheduling issues . Still, if you could get half of that it ...
by Tbird
Fri Jan 24, 2014 12:08 pm
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

Right on! - Aruba have some nice in-depth white paper on multi-user MIMO and modulation - for those who wants' to expand their understanding. I've also seen some simulation results concluding that 100 subscribers is no problem for AC. Hmm - we definitely need to test out AC in PtMP mode here now. /TB
by Tbird
Thu Jan 23, 2014 3:36 pm
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

This most of all due to good antenna, with -45 to -50 dB isolation, and integrated with aluminum enclosure for good collocation noise suppression. On one location there are more than 20 other APs "visible" - still good performance, but this is naturally hard to quantify. Another surprise on AC was t...
by Tbird
Thu Jan 23, 2014 11:39 am
Forum: Wireless Networking
Topic: 802.11ac
Replies: 51
Views: 29478

Re: 802.11ac

We have been running a couple of 25dBi AC PtP links in Sweden for 6 months now - and it is awesome! To take full advantage of the 256QAM and 5/6 coding rate, you obviously need good signal - but you also need really good port to port isolation on the antennas. On 80MHz channels we see close to 600 M...
by Tbird
Sun Jan 12, 2014 12:22 am
Forum: General
Topic: v6.7 released
Replies: 225
Views: 109812

Re: v6.7 released

I have the same problem as OlegM, but much faster Any of you guys with memory leakage use Radius Manager by any chance? We had the same issue - removed Radius Manager and the API for CPE signal polling, and the memory problem was solved... /TB Why, then, need a router if it can not use radius and a...
by Tbird
Sat Jan 11, 2014 2:41 pm
Forum: General
Topic: v6.7 released
Replies: 225
Views: 109812

Re: v6.7 released

I have the same problem as OlegM, but much faster
Any of you guys with memory leakage use Radius Manager by any chance? We had the same issue - removed Radius Manager and the API for CPE signal polling, and the memory problem was solved...

/TB
by Tbird
Mon Dec 31, 2012 1:56 pm
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

The 3x3 MIMO is not easy stuff to cope with, and the antenna performance is critical in every way. The port to port isolation is one thing, the other will be the polarity separation. While you can achieve a 20dB separation on 2x2 MIMO - going horizontal/vertical, you will not get more than 6-7dB, on...
by Tbird
Mon Oct 15, 2012 1:02 pm
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

We are on a pre-launch program with them, but still waiting for the units – will get them next week I hope. Will test for a week , and then move it into production if ok - our SOP (standard operation procedure). I’ll post results for our standard 10 km test-link. /Tb Hi, Any update on your test lin...
by Tbird
Sat Sep 08, 2012 7:59 pm
Forum: Wireless Networking
Topic: 450Mbps...
Replies: 7
Views: 2610

Re: 450Mbps...

And this as well: http://forum.mikrotik.com/viewtopic.php?f=7&t=62945 We are still testing our 3x3 antenna/enclosure concept and have seen up to 300 Mbps throughputs, but still facing issues with NV2 and disconnects. Like others have reported, 5.14 seems to be more stable – but we still have too muc...
by Tbird
Thu Sep 06, 2012 7:25 pm
Forum: Wireless Networking
Topic: AP cpu vs clients vs bandwidth
Replies: 8
Views: 1005

Re: AP cpu vs clients vs bandwidth

Totally agree, so instead of the “..RAM solves everything –approach”, let’s see if we can help tgwtoronto somehow. If you want to serve 40+ CPEs consider; * Make sure no CPE have poor signal levels – as that will totally mess up the performance. In my experience – you should aim for better than -75d...
by Tbird
Thu Sep 06, 2012 9:48 am
Forum: Wireless Networking
Topic: Wireless Disconnect Extensive Data Loss
Replies: 44
Views: 33835

Re: Admin Please Help - Wireless Disconnect Extensive Data L

A 1-2 dBm variation in SNR trough the days is well within normal conditions – even 5 would not call for worries. This is just how the atmosphere plays with us – and what is the consequence for you anyway? The fact that the radio rate is adaptive could explain the lower rates at night – simply less t...
by Tbird
Thu Sep 06, 2012 9:33 am
Forum: Wireless Networking
Topic: AP cpu vs clients vs bandwidth
Replies: 8
Views: 1005

Re: AP cpu vs clients vs bandwidth

How would RAM impact on throughput?! For sure CPU would, if it was I limiting factor - but memory…?

TB
by Tbird
Mon Jul 02, 2012 1:48 pm
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

Testing postponed until next week :? They hope to have units ready by end of this week - so hope to test next week. Got message that the RF is AR9580/90 though - so it must be supported then. Also, the first models will not have 48V af support - only 24V passive. That sucks as I really prefer to use...
by Tbird
Mon Jun 25, 2012 12:28 pm
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

We are on a pre-launch program with them, but still waiting for the units – will get them next week I hope. Will test for a week , and then move it into production if ok - our SOP (standard operation procedure). I’ll post results for our standard 10 km test-link.

/Tb
by Tbird
Mon Jun 25, 2012 12:01 am
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

Don’t know if AR9580/90 will work on Mtik yet, but AR9380/90 does. The Mimotec Gigalink I’m waiting for is equipped with WLE300N5-22 – so single band 5GHz AR5380/90. Like I said, these new cards support interesting things - like Transmit Beamforming (TxBF) and Maximal Ratio Combining (MRC) – and the...
by Tbird
Sat Jun 23, 2012 6:13 pm
Forum: Wireless Networking
Topic: MCS values explained?
Replies: 7
Views: 11098

Re: MCS values explained?

http://mcsindex.com/ What you can achieve on the modulation and coding scheme depends on the specific link vs. the TX/RX specifications on your RF and antennas. In my opinion it's not possible to give an general recommendation for what settings to use. Would be nice if automatic functions worked pe...
by Tbird
Sat Jun 23, 2012 6:01 pm
Forum: Wireless Networking
Topic: [Req - SOFTWARE] Create Coverage Map of Wireless Netwrok
Replies: 9
Views: 2118

Re: [Req - SOFTWARE] Create Coverage Map of Wireless Netwrok

For other antenna patterns - have a look here: http://forum.mikrotik.com/viewtopic.php?f=7&t=10092 Many seems to use UBNT antennas, and they can be found here: http://www.ubnt.com/support/patterndata As in many aspects of life - there is no way around reading and learning. In my perspective - RadioM...
by Tbird
Sat Jun 23, 2012 2:34 pm
Forum: Wireless Networking
Topic: RB800 3X3 minipci card
Replies: 46
Views: 15181

Re: RB800 3X3 minipci card

My 5 cent; The WLE300NX is very low power - probably more suited for laptops than outdoor applications. I'm also a strong believer of single-band cards. If they are both 2.4 and 5 GHz - like the 300NX, they suffer from poorer performance (TX power and RX sensitivity) than a single band. I got this f...
by Tbird
Mon May 07, 2012 12:22 pm
Forum: Wireless Networking
Topic: Dbii card mis readings TX power
Replies: 4
Views: 1089

Re: Dbii card mis readings TX power

Well, actually it's 8 dBm offset on the F50PRO - that means it's not aggregated - as this is not a MIMO card anyway. So 19 dBm + 8 dBm offset makes you bang on the money at 27 dBm, wireless12...

/T
by Tbird
Sat May 05, 2012 11:57 am
Forum: Wireless Networking
Topic: Dbii card mis readings TX power
Replies: 4
Views: 1089

Re: Dbii card mis readings TX power

The spec says 5 dBm offset, and the spec total is for both chains aggregated. So, what you see is just fine. BTW, one of the best cards in the market together with the Compex ESD series - IMO.
by Tbird
Thu Mar 01, 2012 4:43 pm
Forum: General
Topic: v5.14 released
Replies: 73
Views: 20779

Re: v5.14 released

It seems in Webfig the "Design Skin" button can not be removed. Thats really bad if you want to give some operator restricted write access to the router for certain sections. I also want to mention that it would be really useful if NEW Webfig options would be disabled by default EXCEPT for the defa...
by Tbird
Thu Mar 01, 2012 1:23 pm
Forum: General
Topic: RouterOS 5.14 Webfig Two Terrible Bugs
Replies: 9
Views: 2653

Re: RouterOS 5.14 Design Skin Bugs

Hmm, I think bobwalker may be right - might be issues on the new skin implementation; I can create a skin for users with no policy rights, and the Design skin still shows up in their webfig. Furthermore, from that design skin mode they can then load any other "admin skins" and get full access to all...
by Tbird
Fri May 01, 2009 11:32 pm
Forum: Wireless Networking
Topic: setup more than 500 Links
Replies: 22
Views: 2438

Re: setup more than 500 Links

I don't frequent this forum anymore maxster - and obviously cannot say anything about Strix Nitro without being banned from the forum again. You'll find me at UBNT forum...
Sorry to hear that Tbird. What's your username on the UBNT forum?
Nah, don't be - I'm not :D

Same Tbird on UBNT also...
by Tbird
Fri May 01, 2009 9:46 pm
Forum: Wireless Networking
Topic: setup more than 500 Links
Replies: 22
Views: 2438

Re: setup more than 500 Links

Another aspect will be the Internet pipe - can you actually get 50 Mbps? If you could, you would still have to spread it out on multiple AP. The Strix Nitro we use can do 100 Mbps full duplex - but I consider that most usable for PtP (or maybe for 3-4 multi-point setup). Hello Tbird, we are just ab...
by Tbird
Thu Mar 19, 2009 12:58 am
Forum: Wireless Networking
Topic: setup more than 500 Links
Replies: 22
Views: 2438

Re: setup more than 500 Links

Not quite sure I get you question here, but I'm always reluctant to recommend any proprietary systems or protocols - as they easily rules out other nice options. Nstreme is unbeatable for PtP - for sure, but I would choose other for AP/CPE or PtMP. Like I said - the limitation is in the protocol whe...
by Tbird
Wed Mar 18, 2009 11:05 pm
Forum: Wireless Networking
Topic: setup more than 500 Links
Replies: 22
Views: 2438

Re: setup more than 500 Links

I did not say "I don't like 2.3GHz" - did I? - and not many cheap CPEs can do 2.3GHz I think. For all ISP operations I've seen - the CPE cost is the killer. On a operation of 1000 customers - for every dollar saved on each CPE is - yeah, you get the picture... and if you are doing a lot of "up to 13...
by Tbird
Wed Mar 18, 2009 10:03 pm
Forum: Wireless Networking
Topic: setup more than 500 Links
Replies: 22
Views: 2438

Re: setup more than 500 Links

This can be done - actually we have done this on several projects already. The limit on the AP is related to limitations on the protocol (CSMA) rather than throughput - when it comes to customers to be served. The practical limit we have found is around 40 subscribers pr AP - not that much related t...
by Tbird
Mon Mar 02, 2009 6:07 pm
Forum: Wireless Networking
Topic: APs in WDS causing traffic loop?
Replies: 10
Views: 1568

Re: APs in WDS causing traffic loop?

Maybe you put something in the WDS-menu on the client? On the client (the one running Station-WDS) - make sure you don't put anything in the menus for WDS Mode and WDS default bridge - these should be "disabled" and "none".
by Tbird
Wed Feb 25, 2009 10:48 am
Forum: Wireless Networking
Topic: When Mikrotik support 11n mimo (SR71-5)
Replies: 62
Views: 19690

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

Yeah, me too - really curious about the range we will see on these, and hope to test this week. I'll let you know...
by Tbird
Wed Feb 25, 2009 2:24 am
Forum: Wireless Networking
Topic: When Mikrotik support 11n mimo (SR71-5)
Replies: 62
Views: 19690

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

Wrong gear - the one I'm referring to is the Witelcom Strix - and it's Atheros 5GHz. I'm for sure seeing 100 Mbps full duplex, and I'm wondering how much more I would get if the board had gigabit - and it's not MT.
by Tbird
Tue Feb 24, 2009 11:16 am
Forum: Wireless Networking
Topic: frustrating wireless issues (xr3)
Replies: 22
Views: 3267

Re: frustrating wireless issues (xr3)

The setup is Mikrotik gateway doing Radius-based MAC authentication, connected to several WiMAX BTS sectors (via managed POE SWITCH). All controlled by RIMS (Radius ISP Management System). The WiMAX gear is Witelcom Strix WiMAX (both BTS and CPEs), but these are 3.4 to 3.6 GHz. Are you using the 3.65?
by Tbird
Mon Feb 23, 2009 11:32 pm
Forum: Wireless Networking
Topic: frustrating wireless issues (xr3)
Replies: 22
Views: 3267

Re: frustrating wireless issues (xr3)

Woow, that's crazy prizing! The BTS I'm using is 1500 to 2000 (USD) pr sector - depending on antenna version. These are complete BTS-kit - BTS w integrated antenna, POE-injector and mounting-kit. CPE is almost down to 200 USD. All running in 3.4 to 3.6GHz - and providing up to 5 Mbps customers-servi...
by Tbird
Mon Feb 23, 2009 10:11 pm
Forum: Wireless Networking
Topic: frustrating wireless issues (xr3)
Replies: 22
Views: 3267

Re: frustrating wireless issues (xr3)

Seems to be quite some issues reported on the UBNT-forum for this also - why not consider WiMAX systems - related to spectrum or...? Seems to be plenty 802.16d systems available in 3.5 GHz, and the one we have tested is rock-stable - 7 months up-time now. Freezing cold here to... and prizing is the ...
by Tbird
Mon Feb 23, 2009 9:21 pm
Forum: Wireless Networking
Topic: When Mikrotik support 11n mimo (SR71-5)
Replies: 62
Views: 19690

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

You're probably quite right about the POE-part - most installations are base on use of POE these days. However, the gear we just tested, "Strix Nitro", already maxes-out its Ethernet speed running UDP. With 20 MHz channels we see 100 Mbps half duplex UDP, and with 40 MHz channels we see 100 Mbps ful...
by Tbird
Sat Jan 24, 2009 10:19 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

LOL on you then - if you scroll up that's exactly what you find - a WEB URL...
by Tbird
Fri Jan 09, 2009 9:15 pm
Forum: Wireless Networking
Topic: AP or CPE problem?
Replies: 7
Views: 791

Re: AP or CPE problem?

dawam is right - the default gateway is wrong. The entry with AS (Active Static) should be Destination = 0.0.0.0/0 (this means ANY) and Gateway = 192.168.0.1. That means that gateway for any traffic is 192.168.0.1 - the D-link - that's what you probably want...
by Tbird
Fri Jan 09, 2009 7:50 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

There is a new RAT1.6 beta out for this - also supports UBNT/AirOS now. I've tried it - works!

Seems like some guys missed that RAT is for public download - don't have to ask anyone for it...
by Tbird
Wed Dec 17, 2008 11:25 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

I did not say "the OID must be the same", did I? I said "the OID must be correct - default for wlan1" Wath do you meen by that? :) Well, it's in my post: "You can point it to other IP-addresses also, but the OID must be correct - default for wlan1. I've seen that changing a wlan card messes this up...
by Tbird
Wed Dec 17, 2008 11:21 pm
Forum: Wireless Networking
Topic: WISP Starter
Replies: 7
Views: 1178

Re: WISP Starter

Yeah, not that easy these days - a lot to choose from. My perspective is from WISP-side, and I would spend a moment and analyze what I really must have and what is more like nice to have - put the cost of different solutions into the spreadsheet with the business plan (OPEX/CAPEX) - and you should b...
by Tbird
Wed Dec 17, 2008 12:46 am
Forum: Wireless Networking
Topic: Max clients per wireless interface
Replies: 2
Views: 1706

Re: Max clients per wireless interface

For non-mikrotik setup, I would stay below 35 to 40 pr RF-interface - that's what we see in real-life setups. The limitation here is in the 802.11 protocol - rather than throughput capacity. However, there are a few tricks to reduce packet loss and retransmission on "loaded base stations". Mikrotiks...
by Tbird
Wed Dec 17, 2008 12:11 am
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

I did not say "the OID must be the same", did I?
I said "the OID must be correct - default for wlan1"
by Tbird
Tue Dec 16, 2008 12:08 am
Forum: Wireless Networking
Topic: WISP Starter
Replies: 7
Views: 1178

Re: WISP Starter

I would recommend both base stations and CPEs with integrated antennas. It will save you a lot of work and hassle compared to running bulky RF-cables everywhere. It also eliminates the classic moist in the connectors - and allows you to go 100 meters up a tower without any RF-loss.
by Tbird
Mon Dec 15, 2008 11:42 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

I contacted them the other day - since I could not find the password again, and they said; Oops, no need for password on this - we'll remove it" The software is made for WISP, and made to i.e. run directly from a CD. It expect you to be connected to a CPE in station mode with NAT and DHCP service. I...
by Tbird
Thu Dec 11, 2008 1:37 am
Forum: Wireless Networking
Topic: How can you access a mikrotik board through a router
Replies: 4
Views: 1151

Re: How can you access a mikrotik board through a router

Not quite sure what you mean by saying can and cannot "see". I you are referring to Neighbor Discovery/CDP you have to be aware of this being a layer 2 protocol - means not routable. Using VPN (like PPTP) should work fine, just make sure you have a back-route also - the remote location needs to have...
by Tbird
Thu Dec 11, 2008 1:21 am
Forum: Wireless Networking
Topic: Sector antenna, share ur thoughts
Replies: 4
Views: 784

Re: Sector antenna, share ur thoughts

I guess if you are using 2.4 GHz you don't have more than 3 channels non-overlapping anyway - so 3 x 120 degrees would make sense - unless you run 10 or 5 MHz channels. But like it has been said - every site is different... Personally, I don't like running RF-cables up a tower or mast - to much loss...
by Tbird
Thu Dec 11, 2008 12:56 am
Forum: Wireless Networking
Topic: WISP Starter
Replies: 7
Views: 1178

Re: WISP Starter

I would say you start with a good business plan - detailed with area coverage and target customers etc. There is plenty of good reading on http://www.bbwexchange.com/ And then - if you do some googleling like this: http://www.google.com/search?hl=en&q=wisp+jumpstart&btnG=Google+Search&aq=f&oq= - you...
by Tbird
Wed Dec 10, 2008 11:46 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

Yeah, you're right - I e-mailed their support or info and got a password - I'll see if I can find it. In the jpg you can see how it looks like. Turns amber and red for lower signal levels. It has big numbers so it's easy to see - even from distance. Seen some limitations though; only station mode an...
by Tbird
Tue Dec 09, 2008 9:54 pm
Forum: Wireless Networking
Topic: how to mikrotik ap with openwrt station using wds in p2mp
Replies: 1
Views: 1524

Re: how to mikrotik ap with openwrt station using wds in p2mp

We have seen the same - think they are not fully compatible. I would consider going for Routerboards in stead of wasting a lot of time struggling over this. RB411/ROS does what you want right out of the box to a fair price - then again, it also depends what your motivation is - business or just play...
by Tbird
Tue Dec 09, 2008 9:32 pm
Forum: Wireless Networking
Topic: Wireless Issue
Replies: 6
Views: 1171

Re: Wireless Issue

Hard to say, but with that low CCQ I would look for interference problems first. Can you try other frequencies?
by Tbird
Tue Dec 09, 2008 9:17 pm
Forum: Wireless Networking
Topic: Migrate From 2.4 GHz to 5GHz
Replies: 1
Views: 620

Re: Migrate From 2.4 GHz to 5GHz

I would not worry - even if the free space loss is larger on 5GHz, you are allowed to transmit with 10 times the output power (most countries allow 1W). The big upside on 5 GHz will be the lower interference level and the amount of spectrum available. We have the best possible experience with 5 GHz ...
by Tbird
Tue Dec 09, 2008 8:59 pm
Forum: Wireless Networking
Topic: CPE-Antenna alignment via customer / Application available?
Replies: 149
Views: 33173

Re: CPE-Antenna alignment via customer / Application available?

Witelcom (http://www.witelcom.com) have a software called RAT on their support page - works fine...