MikroTik

jonbrewer

Hi Folks, I think there is a packet size limit in the bandwidth test of 1968 bytes. I have set up two RB600A routers. I configured the L2MTU and MTU on eth1 on each to 9100 and 9000 respectively. When running bandwidth test between them, I cannot get packets larger than 1968 bytes transmitting from ...

jonbrewer

QinQ is working ok, and with 3.15 we are able to set the MTU on our card 00:19:5B:FE:83:XX to be 1514. In this case we bridge the inner vlan to an EoIP tunnel for transport across our network. I have not tried to bridge a VLAN with multiple inner VLANs to an EoIP tunnel though.

jonbrewer

Should I open the case?

Yes, and get out a serial cable and terminal program.

jonbrewer

All protocols broken, or just HTTP? Can you ping? If so, what's the largest packet size?

jonbrewer

It's related to hardware design, can't be fixed. It's an old chipset, you will be better off using something newer. Just about the only thing I'd want a 5211 for is extended frequency support. I wish someone out there would publish a comprehensive FAQ on which cards support which frequencies, and w...

jonbrewer

MMCX as they are much more robust and allow a higher grade pigtail to be used inside the case. With u.fl we have heaps of problems. Our manufacturers have taken to using hot glue to hold the pigtails in place, which means if a card goes (damn those R52H) we have to replace the pigtail too. I am not ...

jonbrewer

In day time speed is low 2-4mbps and in the evening it grows up to 15mbps without any modifications! AP is a RB133 with only 4 clients and i tried ROS 3.10 and 2.9.51. With 3.10 the signals drop suddenly one day and never recover...from -55...-60, to -75 to all clients. After downgrade to 2.9.51 th...

jonbrewer

What we need: need half duplex link like nstreme-dual but with ethernet card as backchannel. Radio card on point A only transmit packets, radio card on point B only receive packets, backchannel via ADSL. NStreme Dual provides a "full-duplex" link, not a half duplex link. You could set up ...

jonbrewer

How can I fix this horrible mistake without resetting my router to default? I have a lot of settings that I don't want to start over with including a lot of hotspot users and a special mangle setup that uses 2 ISPs to get a more reliable connection. /export file=myconfig (download myconfig to your ...

jonbrewer

Wireless cards disappearing is usually caused by a short. Check to see if everything is ok inside of your case.

jonbrewer

Hey Jon, How did you get on for 900Mhz licencing in NZ? We have looked at 900Mhz but decided not to use it due to concerns over spending hours on the phone with RSM, only to have them change their mind and slap us with a $1200 fine. 1. GURL SRD notice 2007 permits 1W EIRP in 921-929MHz 2. Magic hap...

jonbrewer

It doesn't matter what brand of radio. NLOS does not mean that microwave signals will go through mountains or hills; they just flat will not. NLOS will only work for very short distances. Something like 1, 2, or 3km. So when thinking about a longer backhaul, you MUST have excellent LOS along with e...

jonbrewer

make sure the equipment is properly grounded, that they have never been used with the pigtail disconnected and that the power settings are default (you already said they are) Our equipment is all in metal enclosures and well grounded. We always use either default power settings or "card rates&...

jonbrewer

Mikrotik please respond!

1. How often can Mikrotik DFS change channels?
2. When there is a channel change, is it coordinated with station units, or do they disassociate and scan?
3. If coordinated, how long is the outage in ms?

jonbrewer

n is something like N-Stream in mikrotik. It uses 3 different channels 1,6,13 or 11 and bonds those 3 connections which is approx. 108 or 125 mbps. So you'll have to use 3 antennas on your system. On the other hand you may buy 3x R52H and 433 or 600 and make n-stream. You are wrong. Read here: http...

jonbrewer

DFS is dynamic frequency selection. In theory, in a perfect world, it picks the best frequency automatically and uses it. 1. How often can Mikrotik DFS change channels? 2. When there is a channel change, is it coordinated with station units, or do they disassociate and scan? 3. If coordinated, how ...

jonbrewer

When RB can support miniPCI HSDPA ?

That's a very good question.

jonbrewer

What could be the problem in a transparent p2p wds link that at a bandwidth test, TCP, both ways shows 5 Mbps Tx / 212 kbps Rx? There's no noise. The signal strenght varies from -76 to -82.

Try to change the wireless mini-pci cards at both ends.

jonbrewer

802.11 uses data frames and control frames. Control frames are transmitted using the Basic rate and the data frames are transmitted using the Supported Rates. This means that even if the link is "perfect" and able to do 54Mbps modulation at all times, you can't send 54Mbps through it beca...

jonbrewer

I have a link over 17 miles of open ocean. 5Ghz/10Mhz The link fluctuates significantly in signal strength. One second its -60 and a few seconds later can be as high as -90. Thats pretty extreme. I am confident its not interference -induced because if the history with the link (hard to explain). An...

jonbrewer

make sure your firmware is higher than 2.7 before putting in an XR5 else u will get instability hell. Can you elaborate? Does it matter which particular routerboard? What difference does the firmware make? We had a batch of 35 XR5 deployed recently across a mix of RB333 and RB411 and have had at le...

jonbrewer

If you want to play at 400km, grab a Ubiquiti XR7 and try for troposcatter.

jonbrewer

what's wrong with RB333? it's performance is better than RB532, so there can be no reason it can't do the same as RB532 ...

RB333/433 is much taller than RB532 and doesn't fit in our outdoor cases.

RB333/433 has "triple-shot" mini-pci sockets, so you can't stack thick mini-pci cards.

jonbrewer

Yeah, but doesn't the 411A still just have 1x Ether and 1x mini-pci slot? Yes, what you're looking for is the RB433. The 433 is a different form factor from the 133. It doesn't fit in our ourdoor cases, and it uses that terrible "triple-shot" mini-pci connector. 433 is *not* a compatible ...

jonbrewer

Normis basically just told you the RB492 is coming.. They also have NOT discontinued the RB192 case which means the 492 is coming.. Give it a month or so guys.. -Gerard It would have been nice to know that. I asked MTIK for a shipment of 192 and Martins said "product EOL, no demand for more&qu...

jonbrewer

The 411A is more than enough of a board and is many many times faster than a 133. Yeah, but doesn't the 411A still just have 1x Ether and 1x mini-pci slot? If that's not a bloody useless replacement for the 133, I don't know what is. :-( No chance to use ADSL (via Ethernet) on the WAN and still hav...

jonbrewer

I'll bet it's related to the wireless module, and not software. We've had a number of R52H cards and NMP-8602 cards that have flaked out on us and have exhibited similar behaviour. The station trying (and failing) to join may not be transmitting a clean, strong signal.

jonbrewer

Should be fine. Just make sure you use a good power supply.
24volt 1-3 A ? I think that would do it....

24 volt power supply will blow up a RB532, unless you have it on the 48V setting. Don't use more than 22 VDC on the low voltage setting.

jonbrewer

XR5 is filtered only to work well in the 5725-5850 band.

http://forum.ubnt.com/forum/viewtopic.php?t=881

Mike and Robert seem to have differing opinions. I tend to believe Mike, as his comments are in line with what I've seen. Performance outside the standard US bands on XR5 has been absymal.

jonbrewer

Seeing as the EIRP limit on a P-P link in New Zealand is 200W, I somehow don't think you're going to make 400km. An XR5 (28dBm) is not legal on anything higher than a 26dBi 600mm dish, unless you have a lot of cable loss in the system. That said, if you post the coordinates (NZMG please) I'm happy t...

jonbrewer

Changing the channel doesn't help for me. The problem goes away after a couple of hours, stays away for a few days or a week, then comes back again. At the AP, a RB333 with R52H running 3.2: 1 name="wlan2" mtu=1500 mac-address=00:0C:42:1B:4B:0C arp=enabled disable-running-check=no interfac...

jonbrewer

Set your hardware retries to 4.

Can you explain why?

jonbrewer

I have seen these problems. Completely puzzling - especially since hardware watchdog is supposed to reboot a routerboard if it becomes unresponsive.

jonbrewer

We're also waiting for OIDs for Nstreme dual. Mikrotik please supply!

jonbrewer

Is that 17mbps half-duplex or full-duplex? If half, and on x86, you're way down on what you should be getting. We have one outdoor RB333 link with 2x radios on each side, running Nstreme Dual, with 40mhz channels. We get consistent 40mbps+ full-duplex TCP, and 60mbps full-duplex UDP over the 1km lin...

jonbrewer

When upgrading a router from 2.9.xx (either .38 or .50), using the single-package for mipsle, not all appropriate packages were transferred. Missing and important to us were advanced-tools and security. We had to download the zip file of all packages and individually upload the missing ones. PITA!

jonbrewer

I can second this. Seen a lot of 333 reboot issues. Some help is gained by using the reset-configuration command in terminal mode. This got rid of reboots every few minutes and now its measurable in hours. How are we doing on this? I have an unresolved ticket from November on this same issue. I hav...

jonbrewer

Ah Ha! Watch out for packet size on EoIP. You may find very slow rates when moving 1500 byte packets. Experiment by changing packet sizes down to maybe 1420. George Hi George, Ensuring connection tracking is off at every router in the chain seems to improve the rate at which fragmented 1500 byte pa...

jonbrewer

Dear MT,

pleasee add snmp-oid support to nstream-dual interface ASAP.

Regards
Ros

I would like to second this request. Or third it, since I asked via support last month!

We want OIDs!
We want OIDs!
We want OIDs!

jonbrewer

300Mbit/s is meaningless with radios. Rent a fiber if possible or forget the job... you can buy radios capable of 300Mbit/s today, but you have no headroom for future. And for spectrum licenses, you'd pay more than for fiber not speaking about limitless expandability of fiber and immediate 1Gbps av...

jonbrewer

On a RB532, use 2.9.50 and NStreme. We have boards that are happy up to around 20mbps aggregate (half-duplex) traffic in multipoint settings. Each sub is rate limited and all are connected at 54mbps, so there is no contention for wireless bandwidth.

jonbrewer

We have RC10 running, 35meg both ways, nstream-dual, dual links, total of 42 miles. No issues that we can find so far.. Have you had random reboots? We have RB333 RC10 running with Nstreme-dual, 40MHz channels on each end, separation of 500MHz, separate antennas, all the good stuff. The far end has...

jonbrewer

We too may be experiencing this. Pair of RB333, 3x R52H each. Power turned down to 10dBm tx on interfaces in use. NStreme dual between the two. The far end of the link will fail and need a manual power cycle. Bad stuff.

jonbrewer

Actually by putting 20 i LOWER the power. The default is more than this (i have to check exactly how bigger) If i go less than 20 then it can not connect at all. With the default (around 22 but i will check the exact value)) my client has a signal of -38 With 20 the signal fluctuates betwen -45 and...

jonbrewer

does this happened in real life ? a signal with -47 ? RB333+R52H+17db sector ----- RB333+R52H+17db flat 5.8GHz and distance less than 1000m and the signal is -67 !!! RB532 + R52H + 29dBi solid dish and 6km over a harbour, signal varies between -45 and -65 throughout the day, directly related to the...

jonbrewer

Hi Normis,

We need a good Mikrotik solution for transporting customer vlans across our network. QinQ, layer 2 vpn, or even L2TPv3 would be much appreciated.

Thanks,

Jon

jonbrewer

Any news from Mikrotik on support for GigE chipsets?

jonbrewer

Be aware that there is an L2TP bug such that if you lose the wireless link the L2TP session will hang and could cause the routerboard to hang, requring a manual reboot. If you use PPTP this won't happen.

jonbrewer

Well, Here appears to be a success story; After a few hours, a lot of patience with a guy on each tower, struggling with the aiming of the 4ft. dishes, the link was a success, 54Kms, linked at 24-36Megs, with a TCP throughput of around 15M-16M UP and DN. -78dBm Signal Strength, 21-22 SNR, 70-71 CCQ...

jonbrewer

Hello, I've upgraded several RouterBoards with expired licenses using the NetInstall method. I was told MikroTik allowed this for all v2.9.x licenses that were v2.9.x, but older than v2.9.28. (I think v2.9.28 or there about) MikroTik referred to these as "stranded" units that could only b...

jonbrewer

I'm trying to use the 8602s in a PC chassis with RouterOS 2.9.42, but as soon as I enable the wireless interface the system keeps crashing, older Atheros cards seem to be OK. I can't tell whether this is a power issue or RouterOS drivers. I've tried two different PCI adapter cards and different mot...

jonbrewer

The particular feature is implemented in RouterOS3.0
It will work ony with suitable interfaces with Q-in-Q driver support.

Do the routerboard 532 have these drivers?

jonbrewer

I was thinking more along the lines of 1/2 or 7/8 heliax. I was playing with link calculations on a site that was recommended on this board and it looks like the 7/8 might be the way to go on the 600' but I dont know what the 2 antennas on the same freq will do. If I seperate them vertically by abo...

jonbrewer

Just noticed today, No support yet for RTL8111B Gigabit Ethernet chipset in Beta 3 "Realtek RTL8111B PCI-E Gigabit LAN " Please can we have this added? Would be great. Drivers for Linux2.4 and 2.6 are here: http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=13&PF...

jonbrewer

After upgrading two routers with EOIP over WLAN we saw serious EOIP problems. Things ran good with MT 2.9.17. No configuration change! We saw that big packets can't travel through the EOIP-tunnel. Only set lower MTU to the incoming eth helps. There must be a change in the EOIP. :( I can confirm thi...

jonbrewer

My #1 request is MIMO - preferably 2x3, but even diversity receive would be an extremely welcome addition.

jonbrewer

See the bottom of: http://www.simandl.cz/stranky/linux/atheros/atherose.htm ... on that page you will also see how easy it would be for MT to allow diversity, by just adding another field to the 'Antenna Mode' drop down box and passing 0 as the parameter of RX and TX antennas to the madwifi driver....

jonbrewer

Ive done some browsing around the forums regarding power requirements..... forgive me, but they all seem at most, ambiguous. My simple question is will a 12v 1.2amp DC adapter work with such... running at ~333mhz with an xr5 mpci (full power, possibly adding one extra card in future) We've never ha...

jonbrewer

If I can make a plea - please keep the form factors the same, or at least mounting holes in the same places. Those of us who have had custom enclosures designed for RB500 series have found that the less expensive, smaller boards do not fit, even though they could fit if mounting holes were in the ri...

jonbrewer

accecptable input ranges (from memory, may be off 1 or 2v on the high numbers... 532 - 12-24v or 40-54v (depending on jumper) 512 - 12-24v 112 - 12-54v I would not put more than 22 volts into an RB500 on the low power setting, as it will fry the board (in my experience). :-( I have never tried the ...

jonbrewer

its a Mesh WDS nodes , so I have to use Omni antenna on each node , whts the alternatives ? and I have to use the MT box as the main AP far from the omni about 50m. Don't mesh using WDS and single radios - it'll end in tears. Use multiple radios, P-P links, highly directional antennas, and do your ...

jonbrewer

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...

jonbrewer

it has nothing to do with the power supply. as i said, we will fix this problem in the next revision. we changed one part but didn't notice that it affected this one particular card

What's the part, and what's an acceptable replacement? Otherwise do you have the next revision ready?

jonbrewer

I have several Senao NMP-8602's and they work great if if 2.4Ghz range. If I put them into 5+GHz Range, the router boards just keep rebooting. Doesn't matter what the power setting id that I use. I have the same issue. It seems that tx power to 12 on some, and 10 on others, will keep them from rebo...

jonbrewer

Why do I get packet gain when I ping from the MT ap to the cpe?

I have seen it using Mikrotik when there are serious rf problems on the link. For example mismatch polarity.

I have also seen it with Mikrotik using some 2.4GHz PCI Atheros cards from D-Link and Level1.

jonbrewer

Is it possible I just got a bad batch, or has anyone else seen RB112 units crash and not reboot - requiring a power cycle to get started again?

jonbrewer

Here's an antenna suggestion for you: http://en.wikipedia.org/wiki/Image:White_Alice_Antenna.jpg Seriously though, I hope you have plenty of land in the foreground at each side. Also if you can spend the money you should use something that supports diversity receive - like an Orthogon Spectra. Other...

jonbrewer

You should leave the rates to default -- these come from the card and the card manufacturers sets them. AGAIN YOU ARE CHANGING THINGS YOU DON'T UNDERSTAND.... Read the specs sheet and you will understand that all rate should not be at the same power. Again I suggest to go back to defaults '/system ...

jonbrewer

I have repeated this on the bench with numerous RB532s and EMP/NMP-8602+, not all cards to this, and it doesn't seem to occur in RB112s. Power is not an issue I've tried various PoE sources, and TX settings, to not avail. This is still a problem I don't know why some cards work and some don't, but ...

jonbrewer

Frequency scan show 0 usage. :roll:

I don't think Frequency Scan will show non-802.11 systems using the frequencies. Can someone from Mikrotik comment please?

You could be sharing the area with one or more of the following:

1. 2.4GHz AV sender
2. 2.4GHz DSSS Trango
3. 2.4GHz Motorola Canopy

JB

jonbrewer

Damn, I just ordered a bunch but haven't set them up yet! In hindsight I guess it pays to ask first! :)

Mind you they won't be used for anything over 3km and will be out in the sticks with no other networks around so hopefully will be OK.

There are other networks around. Engineer carefully.

jonbrewer

Thanks for the reply. We did in fact enable nstreme/polling and the ping times are still pretty ridiculous. Anywhere from 16ms to 249ms. I added a firewall filter to see if P2P traffic was causing grief and 0 packets were caught by the filter so I know that can be taken out of the picture. CPU util...

jonbrewer

Regs are pretty simple

4w's for 2.4
1w for 5.15-5.25
4w's for 5.25-5.35
4w for 5.725 to 5.825 PtMP
200w for 5.725 to 5.825 PtP:D

Gee, that's funny. In New Zealand 5.25-5.35 is 200mW, or 1W if you have TPC and DFC. Read the regs!!!

jonbrewer

basically the frequencies are completely different, so there should be no problems. Yes, the wireless transmission frequencies are completely different, but the system board and Ethernet links will be heavily interfered with if the FM station uses high enough power. Also to consider is that since t...

jonbrewer

Hi, I have read some of the speed limitations of the RB532/564 with wireless links to be around 23-30 Mbps. I want to use the RB564 as a multiport erth router only with no wireless links at a few locations. Routing will be done between 5 ethernet ports, with total eth bandwidth of approx 20-40MB an...

jonbrewer

Those pings look typical. You are sharing 5GHz spectrum with heaps of other devices that interfere. When you have RF interference and loss on these Mikrotik/Atheros units, data retransmits at layer 1, and the loss shows up as jitter.

jonbrewer

Is *anyone* using Nstreme dual with small channels!?!

Mikrotik, can it be done?

jonbrewer

I ordered four rb112 units with new powersupply's. Install two of them and they would work from 12 to 72 hours. This went on for two weeks. I didn't find any one else reporting lockups. We have had lockups with rb112. I mentioned in the routerboard forum that it seems the hardware watchdog may not ...

jonbrewer

Just received a shipment of RIC/522 with RB112 inside. The first two of the units have managed to crash and not reboot themselves during configuration and testing. Has anyone else experienced RB112 failure like this, requiring power cycle to restart?

jonbrewer

I've found the u.fl connectors on R52 much more prone to damage than on CM9. We have several broken R52 cards due to connector damage, while we don't have any broken CM9.

jonbrewer

We have a large number of P-P links using Mikrotik with Nstreme and 20MHz channel. We are now interested in running Nstreme Dual with small channel size. Our object is delivering low jitter 4mbps & 10mbps full-duplex circuits (rate limited by L2TP server) in P-P mode while conserving spectrum. I...

jonbrewer

Hello marksx,

Your work is fantastic. Can you please email me?

Cheers,

jon (dot) brewer (at) araneo (dot) net (dot) nz

jonbrewer

Hi there, We tested over water at 8.2km with our high-performance 600MHz CPU x86 platforms - running RouterOS with 5.xGHz and OFDM modulation into heavily-obscured Fresnel zone. Good results - Report here: http://www.cablefreesolutions.com/radio/Wireless%20Testing%20Report%20-%20Solent.pdf Stephen,...

jonbrewer

Hi, I am fairly new to using RouterOS. So far I have used it on RouterBoards for creating bridges, doing basic routing and rate limiting. This is the first time I have attempted to get wifi going in a Mikrotik. First up, I am running MikroTik RouterOS 2.9.8. I am using a CM9 card, from Wistron Newe...

jonbrewer

Absolutely perfect clear LOS at about 2 miles...

Signal = -82 and fluctuates between 24-36mbps

I am going to change out the pigtail tomorrow, to eliminate that...

Do a physical inspection of the connector on the card too. While the pigtail may be just fine, the actual connector could be broken.

jonbrewer

NTP still does not work in any of our RB 500 series machines. :-(

jonbrewer

What´s packet gain in ping test ?? no packet loss !! but packet gain !

I've seem packet gain in tests of links with particularly dirty RF. Last time I saw it was on a link with a polarization mismatch (90 degrees off).

jonbrewer

anyone .. ?

We have done this with triple-hop links, all configured with multi-radio units in AP - station relationships. There were no issues - other than the cameras that output mpeg4 tend to be cheap. Have never tried anything using single-radio mikrotik boxes. :-)

jonbrewer

No, I haven't even designed the mesh system at all yet - just throwing some ideas together that maybe we could put together into a working OSPF routed mesh dual,tri-radio Mikrotik install script. I would use EOIP tunnels to make the Wifi-client radios connect on the same subnet, to allow intra-cell...

jonbrewer

do you recommend using SR5 (400mw) radio cards instead of R52 cards? how much do you think that would help? We have until now used custom amps from Hyperlinktech in to overcome such situations. I ordered four SR5 cards from Mikrotik yesterday for testing, so in a few weeks I'll be able to advise. I...

jonbrewer

i am going to set up a 23 kilometer point to point link on each site: RB/5LD3 (Routerboard 532 Outdoor PoE) complemented with two R52 radio cards (for dual-nstreme) 5G/PAR (30db Solid Parabolic Antenna) AC/LAR58 (Lightning Arrester) we need to acheive at least 20Mbps throughput, the link will be us...

jonbrewer

Three of our 16 rb532 units reboot themselves randomly. One is a definite RMA, the other two we need to find the time to set up in the lab with a pile of clients and actually document what's happening. Unfortunately that consumes time that we don't have.

jonbrewer

Would you guys suggest/consider putting the supermicro boards on top of a tower? What about cooling? Intel CPU? If it's a proper tower, we use indoor boxes on rack shelves or in cabinets in the radio room, and LMR400-900 up to the antennas. Reason being, if something goes wrong with the hardware yo...

jonbrewer

Did you build the units, or get them from Mikrotik complete? If you built them, try changing antenna mode from ant-a to ant-b and maybe it will work.

jonbrewer

Hello, I am having some problems with 2.9.6, first of all I cannot upgrade because it will not let me go into it through FTP. second, for some reason things I do to on the router keep disapearing, example of one, created 10 new ppp secrets and modified like 15 of them by adding a comment. The next ...

jonbrewer

Johnbrewer, Are you in the Chathams or somewhere in Year 2000. Your NTP server has started, but time has not been set. It should be saying status: synchronized and correct time and year.. Maybe it hadnt had time. KenK Nope, just in NZ. GMT +12. Clocks on our 12 RB532 boxes still don't work. Can any...

jonbrewer

Anyone experiencing lock-ups since moving from 2.8.x to 2.9.x? I have seen station units running 2.8.x crash when a 2.9.x RB532 reboots and 2.9.x clients on Intel just stop working and need a power cycle for no apparent reason. I would like to know if anyone else is having issues. Many of our units ...

jonbrewer

if you have correct NTP client configuration, clock works fine in RB500. Yes, the NTP server works. It is the national NTP server for New Zealand. All our Debian boxes use it. No, it doesn't respond to ping. [admin@ara-imperial] > /system resource print uptime: 1w7h32m33s free-memory: 18936kB total...

jonbrewer

Is anyone using diversity receive to overcome fading issues? Large microwave systems have been doing this for ages. I envision two antennas coupled together and connected to the A port on the Atheros card, and one antenna on the B port. (Where RX=A TX=B) How would the Atheros chipset handle input fr...

jonbrewer

use NTP and synchronise the time with a reliable time server

Clock doesn't work with any of our 12 RB532 units deployed - and NTP doesn't work either. This is a serious bug.

jonbrewer

I've found that over our network g729 performs better than g711. This may be limited to the ZyXel WiFi VoIP phones we're using. With g711 we were finding many quality problems, even on stable, idle links.

jonbrewer

You can configure Mikrotik in a mesh topology, but I wouldn't recommend it unless you are CCIE or equivalent hot shit at routing. That said, a well engineered Mikrotik system using all multi-radio boxes with P-P linking is going to blow the doors off anything from Mesh Dynamics.

jonbrewer

I pulled the 2.8.21 unit (since it was past upgrade time) and replaced with 2.9.5 unit, and haven't had anohter crash.

This says to me that there are backwards compatibility problems here.

jonbrewer

Bizarrely, we found 2x24Mbps works better than 54Mbps (non-turbo) on a given link conditions. That's because with Turbo on lower speed you're using a more robust modulation (16QAM instead of 64QAM) and spreading out your data over 40MHz instead of 20MHz. You have twice the subcarriers and less comp...

jonbrewer

Can someone tell me why there is so interesting difference between these two solutions: Both were tested on the same link with real traffic up to 16Mbit: MT on RB532 with nstreme and CM9 in 5GHz Turbo - bad latency - up to 50-100ms - max p/s over 3500 on graph - no packet lose The MT is great but p...

jonbrewer

guess what ur wrong it gives an error CONNECTION TIME OUT!! Make sure you have only one interface in the windows box you are using with Neighborviewer. If for example you have a LAN and a WLAN in the windows box, and you use Neighborviewer, you will see the Mikrotik router, but when you try to conn...

jonbrewer

Does anyone care about CCQ? I think it is a very important measure - as important as RSSI.

jonbrewer

I have an RB532 supplied from Mikrotik complete with 2x rb52 interfaces & 18V PoE.

Since upgrading from 2.9rc9 to 2.9.2 (then .4, then .5) it has been crashing randomly. Also one 2.8.21 client disconnects and will not reconnect without a reboot. This is bad.

jonbrewer

Is it possible to obtain tx and rx CCQ via SNMP? If so, can anyone post the OIDs?

If it's not possible via SNMP, is there any other way to monitor CCQ? We have a link that has issues occasionally and I think they come up when the CCQ drops below 10, but can't prove it.

jonbrewer

as far as i understand, watchdog rebooted his router, he didn't do it himself. it was probably due to some error or kernel panic. does this happen often? Hi Normis, this has happend three times, all since updating software from 2.9rc9 to 2.9.4. There is one 2.8.21 client that won't reconnect to the...

jonbrewer

Anyone seen this before? jan/01/2000 00:00:13 system,error,critical router was rebooted without proper shutdown by watchdog timer System is RB532 w/ 2x RB52 interfaces. WLAN1 is station (to bridge) on 5GHz, WLAN2 is ap-bridge on 2.4 w/ 3 clients connected. It's supposed to print supout when the watc...

jonbrewer

I have NETGEARS wg311T atheros wireless card. I read somewhere here on the forum that this card is bad, Its recognized by mikrotik(2.8.25 ver.) as an AR 5213 but it doesnt work at all. I tried 4 of them, not all can be bad. They work in PC. I have the same chipset on LEVEL ONE card that is working ...

jonbrewer

I need to build 2 hop link on SR5. If i use RB532 with 2x SR5 +25db antennas on the tower between 2 hops 1.sr5(25db-ant) -------14km------2.sr5(25db)sr5(25db)------25km-----3.sr5(25db) what will be real transfer between point 3 and 1 on my graph? i need 10mbit duplex. any suggetions? Use 4x total R...

jonbrewer

I found a bug. (what's my prize? :twisted: ) I have duplicated it across three RB532 units running 2.9.4 and earlier versions. When RB532 (with RB52 interfaces) is set in station mode, mode is superchannel and scan-list is set 5100-5900, the station will not associate with an access point. One acces...

jonbrewer

Hello everyone. I would set up wireless connection between 2 pc(1 server, 2-station). Distance is 1km and there is no straight visibility(there are buildings,factories enroute) Maybe i should use 2 parabolic dishes. Or some advanced AP and strong wifi net card?! You should use 900MHz equipment desi...

jonbrewer

Am I to understand that no-one can make this work? or is it that the support from this forum sucks. We rely heavily on policy routing - some of our boxes have eight different tables, as we carry traffic for a number of ISPs on our network. I have moved some test machines over to 2.9.4 from 2.8.28 a...

jonbrewer

What is the MTU of the public interface? Is it possible that ICMP is blocked somewhere?

jonbrewer

http://www.roamad.com are using mikrotik equipments to support their own os, and they mention someting like they can actually support up to 8 radio per node.
so i think it will be ok just to support 3 radios

regards

Can anyone confirm this?

jonbrewer

This evening I accessed the station end (running rc7) of a wireless bridge using telnet. I set "Safe Mode" with control-x. I then entered: interface wireless set wlan1 rate-set=configured supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps I did this because connect was 54/36mbps but jitter was ...

jonbrewer

have a big problem with new cards from DLINK and Mikronet. Dlink dwl-g520 hw ver B3, FW 4.11 mac 00119591a560 Mikronet SP908 mac:0x7/0x9, phy:0x45, a5:0x56, a2:0x0, eeprom:0x5002 mac 00:0F:A3:29:F4:5C mt 2.8.20 - 2.8.26 recognize these cards but not work as client or AP. in client mode radiocards d...

jonbrewer

Ok, I got this card, chipset is atheros 5213 (b/g) but wireless won't work Planet WL-8310v2 Any chance you guys know what happened? My friend has this card too WL-8310v1 b/g works fine, but extra-channels won't work Thanks I have two different brands of new, out of the box 5213 cards that don't wor...

jonbrewer

We have a couple of RB500 units that have been up since install - but they're still running rc2. They're both some distance away, and both in heavy use - it would be very inconvenient if they broke. Has anyone had an RB500 unit *not* upgrade properly? Is there any risk to uploading the new software ...

jonbrewer

Well I lost yet another voip customer today. This one is about 80 feet away across the street. I have tried the linksys wet-11, a microsoft access point, then to the linksys gs routers (reflashed to linux). All three access points seem to do just fine but the pings jump around. It goes 6ms then 12m...

jonbrewer

400MHz CPU is not fast, and if you are running bandwidth test on the routers (you should run **through** the router) then you might be using up all the CPU power. What does CPU usage say? Our 400mhz Celeron boxes + AR5213 cards are good for 30mbps full-duplex UDP using bandwidth test or 42mbps half...

jonbrewer

We're usign AMD Semprons 2200+ and 2300+ on ASUS A7V8X-X (with 128 MB RAM) (4 base stations, 1-4 atheros'es + 0-1 prism's 2.5 on each). Czesc v1nt3r! We use some A7V8X with Sempron down here in Nowa Zelandia. They have all been running great since install. Just as good as our Intel boards at half t...

jonbrewer

I've got 46 dudes. Or I have one dude and 45 error windows. Something like that. Somewhat inconvenient. Where do I report? (Each of the windows is titled "Error, please report". Here I see: BUG in dude version 0.1beta1: ASSERT 0 failed in unsigned int Allocator::allocate() at common/alloc....

jonbrewer

What version of mt? I agree with the post about tower top radios. Elimiate that 1/2 inch stuff or go to something like 1 5/8 and you'll see a big improvement. If you find 1 5/8" cable that is rated for use at 5GHz, please post a link. None of the fat heliax is good past 3GHz. We have used LMR-...

jonbrewer

So what's new and exciting in the Atheros AR5414 chips?

Single chip (MAC and radio) a/b/g card, should be cheaper to manufacture and lower power draw. External PA/LNA possible if you're designing your own card.

jonbrewer

I purchased MT RouterOs level5 license and in the test environment I have created it is working pretty good. The question I have is, I will like to purchase MT PTP equipment to use for my PTP setup from my ISP about 20miles with a bandwidth of 512kbps at a very hot climate in Africa. LOS is very cl...

jonbrewer

hello this is a on going issue i keep asking about but . why with the cm9 card running in 5ghz does it lock up my system using a dfi-socket 370 mottherboard 1.3ghz chip 128 ram sd cf 128 now this is the funky part if i change the card to run on 2.4ghz i dont seem to have any issues , but as soon as...

jonbrewer

What about Channel Filters? sumthin like http://www.rflinx.com/Filters/2400_UHQ_Filter.htm //never used one of them //don't work for/sell rflinx stuff Stephen, I too would recommend using band-pass filters. They will clean things up inside your AP. If your tower is going to be a building, don't wor...

jonbrewer

Does anyone know if true receive diversity is supported in Mikrotik? I know have read that Prism Cards dont have proper diversity support but does MT with another card work properly? I only see you can set RX and TX but not the recieve diversity. Is it just a hardware thing? Tim I would be very int...

jonbrewer

Is anyone out there successfully using G-Turbo? How fast have you had it go? What sort of an impact on signal strength has changing to 40mhz channels had? Half the power literally? Any issues we should know about before spending two hours on a Sunday trying to make it work?

jonbrewer

Here's an interesting bug. I have reproduced it with two sets of hardware on #3. All three units are running at least 2.8.21 #1_______________#2_____________________#3 |AP| ---5GHz--- |Station - AP| ---2.4GHz-only-G--- |station| When #2 AP is set to 2.4GHz-only-G AND rate is configured to 6mbps max,...

jonbrewer

If you write to support, they can send a script that will ping the client and make a suppout file.
John

That's funny, I never got support to write a script for me... Support just pointed me at an examples web page that didn't have a script for my issue.

jonbrewer

The link is used for voice and data, but all the data has been shaped to 1 Mbps, 1 phone uses 60 kbps of bandwith, right now there is only a total of 25 phones, 8 phones @ site, and for now the peak is like 5 phones at the same time, sometimes there is bad voice quality and sometimes good quality, ...

jonbrewer

Hi,

is it possible get 3,5 GHz cards and put into MikroTik?

Thanks

A number of vendors sell 2.4 to 3.5 GHz upconverters if you have some spectrum you can use.

jonbrewer

Am in Otago ;) Sounds interesting. Have you tried to see who uses 6g stuff already? I know some people in Christchurch who would be interested in 6Ghz licenced if it was just a nominal increase in equipment cost. Send me an email or grab me at NZNOG in Hamilton next month. Prefer before I find my w...

jonbrewer

Does mikrotik have suport for sip? As far as I have seen, it has only support for voip... SIP uses RTP for transport. We have found it impossible to prioritize RTP traffic using mangle and QoS with Mikrotik which is bad because we have customers that tend to stuff their pipes and need to prioritize...

jonbrewer

Which driver supports 2300Mhz-2500Mhz and 4900Mhz-5850Mhz frequencies Do any cards support up to 6.100 GHz? So you are using licensed freqencies up there now ;) Up there? Where are you, the South Pole? Not too many people live further south than we do. Seriously though, our business customers are w...

jonbrewer

why not? see: http://www.mikrotik.com/docs/ros/2.8/interface/wireless.content#4.13.7.5 Yes, your software supports these frequencies, but does any radio support it? The AR5212 Radio (used together with 5213 MAC in AR5004X package from Atheros) is only tunable from 2.3-2.5 and 4.9-5.85. All the chip...

jonbrewer

Which driver supports 2300Mhz-2500Mhz and 4900Mhz-5850Mhz frequencies

Do any cards support up to 6.100 GHz?

jonbrewer

I am looking for 5GHz (5.6-5.8) flat panel antennas. The antenna need to have the smallest footprint available and should give atleast 23 dBi, preferably more. MARS 23db 5.15-5.875GHz panels have served us very well: http://www.mars-antennas.com/58ghz.htm There are two types of mount - with AZ adju...

jonbrewer

I've got situation like this MT + AR5210 + 7m CNT-400 (andrew) + pigtail 40 cm + panel antenna Mars 23 dBi 1,4 km full line of sight; fresnal zone clear MT + AR5210 + 5 m CNT-400 + pigtail + Mars 23 dBi i'got signal level like -70 to -73 i think it's too low what could it be ? 40cm pigtail could be...

jonbrewer

We use 30+ Mikrotik licenses now, as AP and Station, to deliver wireless circuits for six ISPs in New Zealand. We generally use one pair of radios per link, so most of our links are P-P. Everything is in 5GHz band, 20MHz channel, links of up to 1.5K in 5.3, longer links in 5.8. Link distances Min .2...

jonbrewer

You are using dlink dwl-ag530 on a, b or g ?

We have DWL-AG530 and DWL-AG520 PCI cards deployed using 5.2 & 5.8 GHz. Also have Proxim 8242 PCI cards on A. With the 2.8.21 of the software all are running beautifully.

jonbrewer

Jon, that's one excellent performance! Will you post your configuration of IPIP or EOIP tunnels? Omit IP addresses and passwords and stuff like that, I'm interested in config of IPIP (it's very simple, but we haven't had success with it - performance was low) and mainly with MSS/MTU mangling - do y...

jonbrewer

Hi folks, Just posting to confirm that 2.8.21 has indeed fixed the problems with the D-Link DWL-AG530. Using the normal wireless package (not nstreme but also not wireless-legacy) on a link of 6km in an extremely busy RF environment: /tool bandwidth-test 10.16.0.81 protocol=tcp random-data=yes direc...

jonbrewer

hi pcmd, I can confirm - my experiences with tunnels are very similar. We were able to push around 80kB/s = 640kbit/s on 34Mbit e1/t1 line... which without tunnels passes >32Mbit/s... btw, what is the FASTEST tunnel in MT? I thought IPIP should be the fastest because of its simplicity and lack of e...

jonbrewer

When rx-a/tx/b (or rx-B/tx-a) better than a single antenna? If it works, it can allow one to use low power bands for longer distance outdoor links. In NZ max EIRP for 5.25-5.35GHz outdoor is 250mW, which means little more than a 10db antenna can be used. A point to point link of several kilometers ...

jonbrewer

I use wireless-legacy, and it works ok, both 5212 and 5213....I use dlink, planet and trust cards...but with new drivers they just dont work...tried sending support files to MT, sending messages on forum and to them directly, they said it is working, but it didnt work...so I give up complaining and...

jonbrewer

Is there any calculator for ack time? most of my links are below 5 km, so I am using indoors settings...Shoud I use otherwise?

At some point in the software revisions setting ack-time to dynamic for outdoor links started to work. I would not use indoors as that would be for links of <100 meters.

jonbrewer

In v2.8.19 bandwidth test will be fixed.
Is it fixed in 2.8.19? The changelog does not mention.

I have tested it. It does not seem to be fixed in v2.8.19. When will it work?

jonbrewer

In v2.8.19 bandwidth test will be fixed.

Is it fixed in 2.8.19? The changelog does not mention.

jonbrewer

I have problem with performance on atheros AR5212 based WDS link. Using 5ghz or 5ghz turbo mode, on 2.8.19 there is performace problem, througput is ~512kbit/s only, on 2.8.16 I have +10mbit/s througput however there wireless connection seems to lockup, system is still working, wireless connection ...

jonbrewer

I have spoken with SBE today. I am waiting on pricing arangements. I am also working on getting Eng. samples for Mikrotik to verify opperarions. Having a rough number of people who want them would help me drive the cost down. If you are interested in T3 cards please post a reply and provide a guess...

jonbrewer

Have upgraded one link from .17 to .18, now bandwidth test shows a max of 900kbps tx/rx with UDP and immediate disconnect with TCP when link is 36/36mbps and very stable. I am able to push about 6mbps traffic through the link via f tp. (not great, but much better than bandwidth test shows!) Ideas? D...

jonbrewer

I have here: - two piece of InterepochIWE3000 - and two piece Senao 3054CB3+ - with 24DBi and 19 Dbi antenna LMR 400 (3 feet) pigtail - with clear line of sight (200 meter above the ground PROBLEM: its not getting even more than half megabyte and I tried to use 5.8 converter from hyperlink with 200...

jonbrewer

look at your `/system check-install` and see how many corrupted files you have

I didn't see any corrupted files - it just says "Done!"

I also didn't see both packages anymore. It seems that adding the "wireless legacy" package gets rid of the "wireless" package.

jonbrewer

but wouldn't squeezing a couple extra db out of a link be worth a simple switch? as i said: a nice to have low-cost-market feature. i know what a good receive-amplifier with -105dB costs, therefore i do not think atheros is using such one. the white paper does not mention any other radio parameters...

jonbrewer

this will only cause problems. if you have problems, remember this. you will have to remove both and then install one

I have not had any problems with both wireless and wireless legacy installed. What will happen?

jonbrewer

Hello. I have a customer wishing prioritization of VoIP packets. They are using SIP protocol. They tell me it works like this: UDP 5060-5063 used for call setup UDP 16384-16482 used for call voice packets I have set packet mangle to mark all UDP packets in 5060-5063 and 16384-16482 with flow mark &q...

jonbrewer

Hi I was previously running 2.8.11 on my backbone which comprises 802.11 a + b + g. My throughput on my 5Ghz links was about 15Mbps effective, today I loaded 2.8.17 on my entire network and my speeds are now down to less than 1Mbps !!!!!! It seems that all of my 2.4Ghz links are still fine throughp...

jonbrewer

Set the stations to 802.11a and then install the wireless-legacy package... See if there is a better link speed This helps quite a bit. Latency goes from 3-400ms over two hops down to 10-50ms. Throughput is ok on the second hop (10mbps/10mbps), 300Meters, but on the first hop is crap, avg. 350k/1.5...

jonbrewer

Set the stations to 802.11a and then install the wireless-legacy package... See if there is a better link speed This helps quite a bit. Latency goes from 3-400ms over two hops down to 10-50ms. Throughput is ok on the second hop (10mbps/10mbps), 300Meters, but on the first hop is crap, avg. 350k/1.5...

jonbrewer

Set the stations to 802.11a and then install the wireless-legacy package... See if there is a better link speed This helps quite a bit. Latency goes from 3-400ms over two hops down to 10-50ms. Throughput is ok on the second hop (10mbps/10mbps), 300Meters, but on the first hop is crap, avg. 350k/1.5...

jonbrewer

You can downgrade your system by uploading the packages you want via ftp. then in terminal window; /system package downgrade After that just reboot your system Yes but after a downgrade from .17 wireless using nstreme to .13 (last one I know to work) wireless, will all the settings be gone? Do I ne...

jonbrewer

Additional info: have tried both with and without nstreme -no difference. Started on .16 release, upgraded to .17 release in the field when .16 turned out to be crap at distance. As I said before, it worked fine in the lab, so I think it's all about distance.

jonbrewer

Hi Folks, Installed a new two-hop system this week and am having serious throughput and latency issues. What's funny is I tested the system in the lab before deploy and had no such issues - in fact had throughput over two hops to 15mbps full-duplex. System uses 5213 radios (DLink AG530, used with mu...

jonbrewer

Well, then again, certain setups have different pricing. I can get DS3 links in 38ghz for $500/year and like $2k equipment. If I only need a DS-3, that's worth it. The higher speed links are much more expensive. Where can you get a licensed link for 2K $ ?!!! Please contact me off-list at reditela@...

jonbrewer

We do support 5212 and 5213. XR will be supported in the future.

John

Is it the future yet? I haven't seen anything in changelog regarding XR.

Cheers...

jonbrewer

What does PMTUD stand for? And do you think just setting the MTU to 1400 would fix the problem? Path MTU (Maximum Transmission Unit) Discovery. Read the notes here: http://www.cisco.com/warp/public/105/38.shtml From the document: "Sometimes, over some IP paths, a TCP/IP node may send small amo...

jonbrewer

Hi Jon, Thanks - that's encouraging, though I'm not sure what to try next other than getting different boards in to test. What BIOS do you have? Many thanks Stephen Hi Stephen, unfortunately I can't get the BIOS info from any of the machines w/out taking them out of service! Machines are on buildin...

jonbrewer

Looks like you've caused a PMTUD "black hole". A quick fix is setting a firewall mangle rule to rewrite TCP SYN packet MSS. In your case I would try setting MSS=1400 and working your way up from there until it breaks. A longer term fix is to make sure your client PCs always know how big th...

jonbrewer

We have four EPIA V boards deployed, two using 2PCI card risers, and two using a single PCI card. Below an AP that regularly bursts >10mbps over wireless links. uptime: 49d37m free-memory: 875992 kB total-memory: 904636 kB cpu: VIA cpu-frequency: 533 MHz cpu-load: 2 free-hdd-space: 31174 kB total-hd...

jonbrewer

How does MT come up with the OID string for a wireless client? I'm graphing signal strength with MRTG, and so far, so good. But ... Were those OIDs created on the fly? If the box reboots, will the OIDs get changed? What event would cuase the OID to change? TIM It is safe to say that upgrading from ...

jonbrewer

Hi there. I second the request for MTU >1500 on Ethernet cards. Having done a little research, I've seen that Intel have released Linux driver support: http://www.intel.com/support/network/adapter/onlineguide/PRO1000/DOCS/LINUX/e1000.htm I wonder though, does Mikrotik not use loadable modules? Is th...

jonbrewer

Here is a link to hardware that currently supports MTU >1500. http://www.uoregon.edu/~joe/jumbo-clean-gear.html Now my question is, does Mikrotik support any of the cards listed at >1500 MTU? hello It is indeed possible for Ethernet to have MTU > 1500. Read here for more info: http://www.psc.edu/~ma...

jonbrewer

Are these cards compatibile with mikrotik??? 1) proxim Orinoco Gold 802.11 a/b/g 8482-WD 2) proxim Orinoco Gold 802.11 b/a 8460-05 3) proxim Orinoco Silver 802.11b a/b8461-05 4) d-link dwl-a650 5) d-link dwl-ag530 6) netgear ha501na 802.11a 1. Yes, we have 10 in use. Using u.fl to N connector pigta...

jonbrewer

wireless cards? other network-cards? with standard ethernet, afaik it's not possible to have MTU > 1500, same with PPP-derived protocols. It is indeed possible for Ethernet to have MTU > 1500. Read here for more info: http://www.psc.edu/~mathis/MTU/index.html I am just looking for confirmation that...

jonbrewer

Hi there. Urgently requesting confirmation of any Mikrotik-supported ether cards with MTU greater than 1500. In particular 1520 or 1540 would be fantastic. Intent is keeping real MTU at 1500 all the way to the client, even when IPIP or PPTP tunnels are employed. Atheros interface supports 1600, whic...

jonbrewer

When will Atheros XR be supported by the Mikrotik drivers? I understand the new cards I have been using (DLink DWL-AG530) have receive sensitivity down to -104, but my connections drop when signal goes below -88. This is a big issue due to the presence of other 5.8 GHz WLAN kit. When will the higher...

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