MikroTik

colebert

RE: SNMP OID FIX I upgraded from 6.03 (ish) to 6.28 a couple weeks ago on six different NetMetal5 devices. Overall-CCQ OID [.1.3.6.1.4.1.14988.1.1.1.3.1.10.8] began reporting as zero (0). Tonight I upgraded to 6.29 on one of the affected devices. This upgrade did not resolve the problem. /interface ...

colebert

there is a problem with OID 1.3.6.1.2.1.4.21 - there is a bug, we will work on that. Would really appreciate CCQ values from wireless registration table being available via SNMP while you're there please! What's wrong with .1.3.6.1.4.1.14988.1.1.1.3.1.10.x OID? mtxrWlApOverallTxCCQ 1.3.6.1.4.1.1498...

colebert

I query specific 1.3.6.1.2.1.4.21 OIDs to determine if my network is in failover to an alternate path. Normally the OID will report router x.x.x.x is nexthop except when a link is down and OSPF has converged a new path. In that case it will report something else and my SNMP monitor will alarm.

colebert

I was querying 1.3.6.1.2.1.4.21.1.7.****** (ipRouteNextHop)

All ipRouteNextHop are missing. I can still walk the tree and see many OIDs, just not these. Walking the tree on v5, nothing is missing.

colebert

I just upgraded a RB750 from v5 to v6. I also have lost this functionality. The OID is 1.3.6.1.2.1.4.21.1.7 - ipRouteNextHop. I can confirm they exist on ROS v5 but not on ROS v6. I walked the entire tree and even added the Mtik MIBs and couldn't find a credible replacement. I really need this funct...

colebert

It looks like he's asking why his laptop connects to the server OK when it is hardwired but does not work when it is connected wirelessly.

colebert

The picture is something but you need to put IP addresses on the picture, too.

colebert

Thank God they didn't eliminate the unlimited antenna gain in 5.8GHz. My entire network (9 hops) is based on MetalHPs/XR5s & 10ft waveguide fed dishes.

colebert

Cisco IOS Software, C3750 Software (C3750-ADVIPSERVICESK9-M), Version 12.2(46)SE, RELEASE SOFTWARE (fc2)

Thanks for the reply!

colebert

9. Shrine to Normis
10. Email to Putin requesting no Latvian annex.
Those 2 usually help me, no idea why its not working for you.

Could the two UBNT picostations I have in my spare parts drawer be counteracting it?

Will throw them away if it helps.

colebert

I'm trying to get ANY port on my RB1100AH to work @ full-duplex gigabit. I have C3750G-24T switches and no amount of workaround will get the two devices working together at gigabit rates. I have tried: 1. Hardcoding RB1100 and C3750 both to gigabit 2. "speed 1000" & "nonegotiate&q...

colebert

Another downvote for the new "dropbox" interface. It's bad.

I downgraded to get back the old look.

colebert

How far out before we see a 5ghz solution with an SFP port? We have some sites on FM towers that can't go past 10BT ethernet.
Seriously this look old but what is 10BT ethernet?

http://en.wikipedia.org/wiki/10BASE-T

colebert

OK then.

colebert

Also, I can disable the radio entirely and problem unit stays at 50C. I am saying the overheating is a symptom of another problem which can affect these units. I like them but 2 out of my original 6 have died with the exact same problem in different locations. Yes, of course I will be contacting the...

colebert

OK, Normis. In my situation it is overheating.

The units live happily and contently at 37-40C for months. Then when they decide to go crawl in a hole and die the temp goes right to 50C and the radio quits working.

colebert

Seeing that the only visible device is with very weak signal, it could be possible your Metal has some problem. Otherwise, have you configured anything in the scan-list? Thank for reply... I think problem with receiver :( Go to /System Health and tell us the temperature of your unit. I have had pro...

colebert

I've now had two out of six Mikrotik Metal 5GHz fail. All my units are kept indoor climate controlled (20-24C) area connected to antennas through Waveguide. One day my system reports in failover. Trace problem to a link consisting of two metals. After troubleshooting I replace one of the metals and ...

colebert

Wireless IPS to detect rogue access points across a fleet of APs like Sonicwall does would be a nice feature.

colebert

The DSCP values would be a reasonable choice. You can use mangle on the 1100 to change it to certain values to tag the traffic and then mark the connection and packets in the 750 based on those tags so you can shape the traffic and set the DSCP back to it's proper value. Awesome. I'll try that this...

colebert

Wanted to get some quick advice about doing bandwidth management after NAT has been performed. We use a Sonicwall in my organization for IPS, SPA, WAN failover, firewall, and content filtering. It otherwise sucks but I can't get rid of it. I have an RB1100 sitting in front of the Sonicwall. I would ...

colebert

I always just assumed that scan and registration page were reporting the power level at the lowest data rate and therefore the one most likely to have the highest power.

colebert

On both sides (AP & client) set...

wireless protocol (wireless tab): any
hw retries (advanced tab): 15
enable nstreme (nstreme tab): YES/checked
enable polling (nstreme tab): YES/checked (AP side)
disable CSMA: YES/checked (AP side)

What is link distance and antenna specs?

colebert

5GHz upper band only. Everything is 1x1. Well, I just see forum post here with people crying about how nstreme doesn't work with this or nv2 doesn't work with that. I don't have a lot of time to test and my application is very limited (5ghz, long range ptp, all indoor) so I just take note of all the...

colebert

Post screen shots of your config. Client and AP side.

colebert

My sites are in a line. A is HQ and G is the farthest site about 200 miles away. At A we have a Cable Modem connected to the router there. At G we have Verizon 4G LTE w/ a static IP connected to the router there. The mikrotik router at A and G connect to each other over these internet connections an...

colebert

I have six links (seven sites) in a row: A-B-C-D-E-F-G Total of about 175mi of wireless links. I don't use WDS or MPLS. I route each hop and use OSPF to tie it all together. I have a IP tunnel between site A and site G that kicks in when a link goes down. Site A is a cable modem and Site G is Verizo...

colebert

Bad Metal5 perhaps? Is one about 10c hotter to the touch than the other?

colebert

Mikrotik Metal 5GHz overheating. All my units are kept indoor connected to antennas with Waveguide. One day my system reports in failover. Trace problem to a link consisting of two metals. After troubleshooting I replace one of the metals and restore settings which resolves the problem. I bought pro...

colebert

I perfer nstreme for stability and latency but nv2 is better for bandwidth. You either need to use nstreme or NV2 for PtP. 802.11a or 802.11n only is a joke for long distance PtP. At 3km you probably could get 30/30 with just an XR5 and 40MHz channel but I suggest you use 802.11n and 10MHz. I sugges...

colebert

In my experience, overdriving the XR5 though the software kills the CCQ more than the card. Also, no discussion of XR5 is complete without mentioning how Mikrotik screws around with the offsets so that I have no confidence that the card is even being run optimally anyway. BTW, I have XR5 42km that g...

colebert

But Radio Mobile is hard and I am stupid.

colebert

If you do not give the board enough power then when the radio start pushing traffic it will reboot.

In other words, don't think that just because your board w/ XR5 turns on and is stable that your power supply is good enough. You should test it under load.

colebert

Excuse me. I shouldn't say no problems.

There is, of course, the long running mikrotik shenanigans with the XR5 power offset.

inb4 "UBNT's fault"

colebert

I run single XR5 cards in 433AH, 411AH, 333, 532A, and 600A. No problems. At first I paid no attention to power supply. What happens is that board will boot and radio will link up. But when you start pushing much traffic the board will simply reboot. 24V/1A or 12V/2A will get the job done on the sma...

colebert

I have not tried to mutliplex a single MIMO radio on one waveguide. Maybe could work if you ran one chain at 5.8 and another at 5.1. Running at the same frequency obviously would not work. I actually need to test how well MIMO would work across two waveguides going to different polarities on the sam...

colebert

Yes, the bandpass filters help in ways you would not think are necessary when planning everything out on paper. We get so greedy and focused on dBs above all else but the reality of the situation is that the spectrum is basically a garbage dump out there. Just cutting down whats hitting our cheap $7...

colebert

In my case, I didn't really care. I share a waveguide with 7GHz radios pushing +34dB. If I don't filter that out then my XR5s don't work right. Also, I'm working with 41.2dBi antennas so workcase of 3dB of insertion loss isn't going to move the needle for me. However, in practice I'd say these filte...

colebert

If you are planning to run in the same band then the answer is no. The reason is that you are connecting six radios operating on the same frequency range all to the same cable. This is not much different than connecting radios back to back. They will burn each other out because the signal from the 5...

colebert

ew42 is rated 4.4 - 5.00GHz ew52 is rated 5.6 - 6.25GHz. ew63 (standard) is rated 5.85 - 7.1GHz (there are multiple models for just the high end band) http://awapps.commscope.com/catalog/Andrew/product_details.aspx?id=1392 http://awapps.commscope.com/catalog/Andrew/product_details.aspx?id=1393 http:...

colebert

Looks like your RB600 is now an RB411.

colebert

Thank you. This advice helped me fix the problem.

I lowered the MTU to 1420 and mangled the MSS down to 1380 against both IPIP interfaces. (1440 and 1400 didn't do the trick.)

Now all my HTTP traffic bound for the internet works fine.

(karma given.)

colebert

Reduced the IPIP tunnel's MTU all the way down to 1000, no help.

I also tried 1001, 1002, 1003, and 1004 in case the Sonicwall wanted it in some multiple of 4.

Can you walk me through how I would make the MSS adjustment?

colebert

I'm still learning and not very good at this. First, I have a fairly large (geographically) network connected together over PTP wireless links. The links are routed with OSPF (no WDS/EOIP) and it works fairly well. For internet, all the sites route out the HQ internet connection which has a Sonicwal...

colebert

This sometimes happens with my c3750 switches.

Hardcode either the mikrotik port or the cisco port to 100mbps full-duplex.

colebert

I have a six hop PTP system that consisted of 12 RBs each with one XR5 connected back to back over about 300 miles. When I used WDS to bridge them all together speeds were much lower than when I used straight up bridge/client and routed them. I cannot explain the problem in technical terms like you ...

colebert

Normis, do you guys have UBNT radios to test with?

colebert

Yes, mtik is excellent at many things which is why I am the first to throw any UBNT fanboy out on his ear when he comes here talking about haow UBNT is superior to Mtik with respect to this or that thing without considering the entire picture. I have decided that you just can't rely on either compan...

colebert

You and I and changeip and a couple others go through this every month or so. Mikrotik does not seem interested in playing nice with the SR71-15. They screw with the power in each successive update... even XR5 was not immune from this between 4.11 and 4.13 (though in fairness CCQ did improve for my ...

colebert

How's your latency and jitter?

Nstreme link the same distance for me does 60-70mbps with 1ms latency.

I took all my bullets down because they were inconsistent. One set would work OK with No Ack and another would suck.

colebert

This is going to seem stupid and/or counter-intuitive but the nature of 802.11 wireless spec is that a AP will only pass traffic generated from the station associated with it (not other devices bridged off of the station.) You are essentially trying to create a bridge with the two units but you are ...

colebert

No one is going to tell you that a 1km PtP with a building in the middle will DEFINITELY work. However, I have seen it people muscle a very short 5.8GHz link right through a skyscraper and have it work well. You probably should just buy the most powerful dB solution you can find and see what happens...

colebert

When will Airmax work as well as nstreme for long-distance links?

There is much to disappointed about in both companies. You seem to have found ONE application for which UBNT works better than Mtik for YOUR purposes. Please try to keep this in perspective.

colebert

1. HW Retries (advanced tab) set to 15 on both sides
2. Turn on Adaptive noise immunity (client and AP setting)
3. Stop using the 5.9Ghz frequency and still with the 5700 to 5840 range.

colebert

karma's a b*tch.

colebert

Yes... Your CCQ sucks.

colebert

Use 5.8GHz range. It is in the basic wireless tab under "FREQUENCY" setting.

colebert

On both radios:

Go to DATA RATES tab
Set to MANUAL
UNCHECK all 802.11a/b/g rates (everything)

That should fix it the 802.11a issue.

Set your HW Retries to 15 on both sides (advanced tab)
Use nstreme

colebert

Hey Uldis, I'll try to get those screenshots up soon. Thanks!

colebert

Mikrotik releases a new version of their software that results in the card performing 10dB worse than their previous version it's somehow UBNT's fault? Seems to me that if care would be taken to make sure ROS can make proper use of a well-known and respected brand and model of 802.11n cards that thi...

colebert

Their bug? Is it their bug that drops the TX power 10dB when you upgrade from ROS 4.11 to ROS 5.0rc2?

colebert

The cards in the link wouldn't happen to be an R52HN or R5HN cards would they?

colebert

When switching between v4.11 and rc2 the MCS rates increase one level.

For example, when I upgraded a link that was set for MCS5 the link came back up set for MCS6. I was able to reproduce this problem.

colebert

At the point I can lose 10dBs of signal strength and 17dBs of my SNR just switching between ROS versions I think it's pretty clear who's driving the clown car on this issue.

colebert

Missing dBs between v4.11 and 5.0rc2

http://forum.mikrotik.com/viewtopic.php ... 1&p=233528

colebert

I do not understand why it has to be so hard to get the wonderful SR71-15 card to work right with ROS. It has been an ongoing issue with ROS and SR71-15 with respect to power levels. Here is a new chapter. Today I updated a 36mi single-chain 802.11n PtP link from 4.11 to rc2. Power level dropped fro...

colebert

wisp... i cannot account for your issues (unless it is POE related) but I can also tell you that I have 6 PtP links running rc1 without issue. My 7th link had an old RB532A that didn't like the upgrade to rc1 but I cannot say that it was rc1's fault as I have not throughly troubleshot. it seems to m...

colebert

Please be more specific...

are you referring to underbuilding 5.8ghz radios into a licensed 6ghz microwave system?

colebert

Its a XR5 ubiquiti card at a RB433 with an Hyperlink Panel 120º 14DBi 2.4GHz!
Thats your first problem, an XR5 isnt supposed to use a 2.4ghz panel : ) Are you asking about wireless (B/G) modes, or data rates on the same mode?

Winrar.

colebert

Time to post up shots of your config so we can see what you have.

Verify your POE ratings on the RB600 reboot issue.

colebert

Is your cell radius set right? if it's ptp you can probably set your tdma period size to 1ms but i suspect it's just a reflection of the fact NV2 is so new and isn't stable. i have 7 ptp links and when i switched them from nv2 to nstreme the latency became more jittery relative to nstreme so i figur...

colebert

Do you uncheck all the MCS rates except 10 on both supported and basic? Because I didn't have any link after that. Then I tried all 4-10 rates, still nothing, then I tried 0-10, nothing, I could only get the link back by going defaulting all the data rates again... Not sure on the ACK thing, it see...

colebert

No, you can adjust on 4.11, too.

I don't understand why you are configuring ack. If you have nstreme enabled on then you don't need to worry about ack.

colebert

This is the best advice I can give you...

1. HW retires = 15
2. Adaptive noise immunity = client & ap
3. Periodic Calibration = off
4. CSMA = off
5. Framer policy = best fit
6. Data rates = manual
7. Disable ALL 802.11a/b/g rates
8. Disable ALL MCS rates except MCS10

colebert

Would love to see the screen shots... esp Advanced, MCS, HT, and Data rates. Set data rates to manual Remove all 802.11a/b/g rates Uncheck all MCS rates Check only MCS12 See if that helps. Also, I disable CSMA on my 802.11n PtPs. FYI, the "Wireless Protocol" tab in v5 is just an order of p...

colebert

FYI, I use 5.0rc1 on all my long-distance 802.11n links with good success. I do not, however, recommend using NV2 with them. All that said, I am about to downgrade back to XR5 due to the issue with missing dBs in ROS with the SR71-15. I need more power more than I need the extra Mbps to overcome ear...

colebert

Post up some screenshots of your config, bro. We'll try to help!

colebert

What ROS Version are you using?

The problem is that you aren't connecting at 802.11n rates. You are getting good speeds for 802.11g but that's not what you want.

colebert

As a test, go to data rates tab and set it to manual config. Then uncheck ALL the rates and apply. That should leave ONLY the N rates as available options. See if your laptop connects at N rates and has better speeds. Report back and let me know.

colebert

Yes, WDS works for 802.11n. Yes, you can use a same single-polarity antenna for 802.11n and get better speeds than 802.11a. 802.11n is not a stable as 802.11a with respect to CCQ. I can regularly achieve a stable 100% CCQ link with 802.11a but same link with 802.11n is maybe 90-100% CCQ. But speeds ...

colebert

ROS 4.11 is OK for N. Single chain N is still very fast. You will see a big speed increase from 802.11a to 802.11n but obviously your dishes are single chain so without an upgrade to dual-chain you will not get the maximum available speeds. It all depends on how much you need and how hard it is to u...

colebert

What is the wireless card you are using in the laptop?

Your laptop is not connecting at 802.11n rates; it is using 802.11g rates.

colebert

OK, yes. That is different. But I'd still like to see the status from the REGISTRATION tab. Check the instructions I gave you above. First thing I see is that you don't have your second antenna enabled. You need to check CHAIN1 on the HT page. Second thing I see is that you should set your ack timeo...

colebert

Hello Is this a v4.11 problem or an N problem? It's probably a "you" problem. :) My 802.11n works relatively well. N works well-ish in 4.11 and the 5.0 beta. I will say that (for whatever reason) that you should expect to achieve a slightly less stable CCQ (i.e., 90%+ rather than solid 10...

colebert

Please read this thread: http://forum.mikrotik.com/viewtopic.php?f=7&t=45769 Start with this: 1. Set HW retries to 15 2. Enable nstreme, enable polling, disable CSMA, set framer policy to dynamic 3. Set data rates to manual. UNCHECK all 802.11a/b/g rates (6mbps ~ 54mbps) Show us a screen shot of...

colebert

If OP is only getting 6megs on an XR5 then something else is wrong.

Please post your configuration for us to review.

Also, please consult this thread: http://forum.mikrotik.com/viewtopic.php?f=7&t=45769

If you are like many people, you have not enabled nstreme or set your HW Retries to 15.

colebert

News Flash: The cell radius setting is pretty important. I couldn't get an NV2 link to work. The client side would register and then drop after only a few seconds. The AP side would never register. I had to go into the command line and set it by hand. I am getting pretty disappointed in the v5 Winb...

colebert

It's nstreme, bro. No ack.

colebert

News Flash: The cell radius setting is pretty important. I couldn't get an NV2 link to work. The client side would register and then drop after only a few seconds. The AP side would never register. I had to go into the command line and set it by hand. I am getting pretty disappointed in the v5 Winbo...

colebert

Happy to help. FYI, bandwidth test in Winbox is not a good measure of throughput. You most likely have much more than that as bandwidth test maxes out the CPU power of the RB. It can't produce enough packets to do a real test. I have a single chain 802.11n that gets 60meg at MCS6 so you are likely g...

colebert

OK, 97%/97% is pretty solid for 802.11n. Just do MCS15 on both sides and see what you get. Do you want to go faster? If so, go to HT tab on each side and enable Extension Channel as "above control." Do a bandwidth test and tell me your CCQ ratings (under the registration tab). I think you ...

colebert

Turn on Adaptive Noise Immunity and set it to "AP & CLIENT MODE". Double-clikc on your wireless interface, go to the registration tab, double click on your connection, go to the signal tab, and give me a screen shot of that. Both client and AP please. Also, let me see your HT MCS tab (...

colebert

OK, seriously. You need to enable NSTREME as I outlined about and do the following: 1. Set HW Retries to 15 on both sides 2. Uncheck set Data rates tab to manual 3. Uncheck all 802.11a rates (no rates remaining) 4. Uncheck all MCS rates except for MCS8 Do the above on both sides of the link. You sho...

colebert

DEFINITELY use nstreme. It makes these kinds of links work right. Turn it on for both sides.

Turn off CSMA and enable Polling. Dynamic or Best Fit framer modes work well.

Can I see a shot of your ADVANCED and HT MCS tabs?

colebert

Are you using nstreme?

Post screenshots of your config for us to review.

colebert

OK, I'll break each link up and see how more reliable my links are.

I don't think you were being unclear. Thanks!

colebert

Sorry, it's only one area. The red zone was just me taking that leg out of the bridge and putting it into a separate subnet.

So you are saying I should do away with the bridging and make each link it's own separate routed space?

colebert

Can I get a bit of advice for configuring my optimal OSPF settings? I have attached a diagram of my network topology. It's basically a series of point to point, back to back wireless links that are all bridged together except for one link which is a separate network. At each site (branch) there is a...

colebert

ccq and tx-signal isn't showinf currently for Nv2 links.
and currently Nv2 doesn't support short guard interval and that is why the max data-rate is 270Mbps

Yes, I observed this too. It's keeping me from testing nv2 as I can't get a sense of CCQ and TX power relative to normal nstreme.

colebert

In ROS 4.11 you can manually set the MCS power levels however as of RC1 you can not do this in v5.

Is this feature going to be incorporated in v5?

colebert

I have nearly a dozen of R5Hn cards that do this. I keep repeating that something is wrong with these cards. I have completely stopped using them. They all exhibit the same behavior you are reporting. One side of the link is 20db lower than the other and the CCQ is terrible. Just get two Ubiquiti SR...

colebert

He's using 4.5. Probably should upgrade to 4.10. Are you keeping nstreme on? (Nstreme=On, Polling=On, CSMA=disabled) Put your card at 17db for all rates. (Set your data rates to 36mbps ONLY) I do not recommend you change antennas... just push less power through them. You want 50s or 60s for power. I...

colebert

lock to a SINGLE RATE rather than leaving them all selected. it's also not clear to me what ROS version you are using. latest build (4.10?) or 3.x? You probably won't want to hear this but, in my experience (and some others on this board) using two XR5 in the same RB causes all sorts of problems. Wh...

colebert

definitely, definitely lower power levels.

mid-50s will be just fine

colebert

I'm using wds + bridge. the tx/rx CCQ is 90-100% but falls to 20% when has trafic.

you did not mention if you're using nstreme...

colebert

post your configuration. are you using nstreme?

what is your CCQ while attempting to pass traffic?

colebert

OoOOoo a new beta soon :) Sorry I am a bit late with this comment below. :shock: First implement Soundblaster-Driver. I want a quadrophonic Star-Trek sound when wlan thruput crosses Lightspeed (100Mbit). :) Wow... Quadraphonic. A Quad Soundblaster driver should be standard in all versions. Make sur...

colebert

Glad to see you finally listened to me. Running one box at ROS 4.x and one at ROS 3.x was not a good idea. Do this: 1. upgrade to ROS 4.10 or 5.x beta 2. enable nstreme, enable polling, and disable CSMA 3. increase rate to 48mbps only and see if you get 100% CCQ and good power report back with your ...

colebert

Leave the TX power settings alone. ROS has correct default power settings for the XR5 and you are risking burning out your card by tinkering with the power levels. Just update your ROS to latest version and try to make the link. 10.5km with XR5 and 27dbi dishes should work even with interference/noi...

colebert

Let me put it a different way. For a 44mi/70km link, your free space loss should be 144db. 29dbi antennas (properly aligned) should yield +58 gain XR5 @ 24mbps has a gain of +28 58+28-144= -58 That does not factor in cable loss obviously but if you are missing about 20db of signal then I suggest to ...

colebert

That will only gain you 4db of strength. YOu may be looking at fresnel or line-of-sight issues at this point.

Also, for a link this long, thermal induction may be playing with your signal. My 58mi NLOS link bounces from -55 to -85 thoughout the day.

colebert

Use Ubquiti cards. Far less problems than with Mtik, in my experience. SR71-15 is a champ.

colebert

yes, let's your config. screenshots in winbox are helpful as well.

colebert

I can't get a CF card prepped with NetInstall 5.0 to boot in an x86 system and install. I had to use that boot CD to prep the CF card.

Netinstall 4.9 worked just fine but so what? No drivers for my NIC.

colebert

Also, even if you are missing 10db due to ROS mistaking the power of your card, you are still missing at least 16db (probably more like 20db, really).

colebert

1. Upgrade to ROS 4.10. There is no more superchannel license requirement. 2. Disable all this antenna A/B whatever. It is unnecessary and can't help your troubleshooting. Is there a reason you are not addressing the Nstreme issue I have been mentioning? It could be that ROS is not reading the 10db ...

colebert

Try other cards. May be you have blown them. You dont need high power for this short link using high gain antennas. R52(n) does the job. This could be the problem, but when I blew a card (or had defective ones) you see low CCQ *and* large discrepancies in signal strength. OP is not using nstreme wh...

colebert

OK, you may say clear LOS but I'm telling you it's not.

Free space loss on a 5 km link is 121db.

26(Power)+24(Tx)+24(Rx)-121(FSL)-6(cable loss)=-54

Where is your missing 26db?

It's either misaligned antenna, impacted fresnel, or non-LOS.

colebert

Turn on Nstreme, enable polling, disable CSMA.
Set HW Retries to 15

You have very low signal strength for a PTP link of this distance. You should investigate possible LOS issues or come clean about what kind of antennas you are using.

colebert

I have two RB411UAH and they work perfectly, no RMAs or issues.

Just sayin'...

R5H and R5nHs? Well that is another matter....

colebert

yup. ok.

My RBs are in sequence:

A - B - C - D - E - F - G (and so on)

If I run a test from A to G and check resources on B, C, D their resources are only 25%.

colebert

You do not test 11n. You test bandwith test. In order to test 11n you should plug a testing system on ethernet ports of the RB411AHs. Perhaps this is true. Bandwidth test could be skewing the resource usage. I have read elsewhere that 802.11n needs multiple streams rather than synthetic bandwidth t...

colebert

I wasn’t sure which forum to post this and I’m sure that this has come up before but here goes. I have an RB43AH with one Ubiquiti XR2 and one Ubiquiti XR5 installed. My problem is with the thickness of the XR radios one radio has to be installed in the bottom mini PCI slot and one radio in the top...

colebert

I have experience making a NLOS XR5 link work at 58 miles PtP. Here are my recommendations. enable nstreme enable polling disable csma turn on adaptive noise immunity (client & ap mode) set HW retries to 15 set data rates to manual disable all data rates except for 24mbps on both sides During te...

colebert

My 26mi test link is configured this way: RB411AH: Bridge mode Optiplex: Client mode (no WDS, EOIP, or VPLS) Freq: 5825 MHz Mode: 802.11n only HW retries: 15 Nstreme on/CSMA off/Polling on/Best Fit framing/3200 framer limit Default TX levels MCS2/3/4/5/6/7 rates only single chain/all AMPDU/extension...

colebert

Sorry if I have missed all the threads stressing the importance of cpu speeds in maximizing tcp throughput in 802.11n PtP links, but I wanted to give an example of my experience so far. For a 26mi PtP 802.11n link (single chain), I was originally using matching RB411AH boards with SR17-15 cards. My ...

colebert

Well about 3 links crapped out to the point they wouldn't stay at MCS0, had CCQ of between 15 and 30, and registered a total throughput of about 5120bps or something. It was pretty bad. But every link was off from 20 to 40 dbm. A couple that have really high SNR (70+) continued to work but the ones ...

colebert

OK, I have a set of PTP links I've been testing for a few months and they have been pretty solid. I got them all going well, or so I thought. For the last six hours they have basically been going crazy and it is all related to signal strength. Let me just say that all my links have clear LOS/fresnel...

colebert

That's why I made my own CD image. http://uploading.com/files/bm14ddf4/mikrotik-5.0beta2a.iso/ OK, I want to take time out of my day to give you karma for this. It completely solved my issue. I was trying to install 5.0 beta 2 on an x86 platform. Dell Optiplex 780 (latest BIOS firmware (A03)) Core2...

colebert

Yes, please fix:

1. SR71-15 power issue
2. Manual MCS power setting in winbox

Please don't tell me that issue #1 is a UBNT issue and for issue #2 I should use the CLI.

colebert

I concur with above poster warning about UBNT. I see the value in their products but they are hit or miss depending on application. If Mikrotik can get it's act together with their ROS 5.0 line of software I think it will be obvious they are the superior platform when it comes to the OS and the base...

colebert

^^ wow this still isn't fixed in 5.0beta? hrm... I suppose Mikrotik sets the correct power for their R5Hn card though right?

Precisely.

colebert

Winbox does not give you the ability to set your MCS rate powers. To fully fix the issue you will need to set the card to manual power and then go into the command line and manually edit that way.

colebert

We use dual polarity waveguide fed Andrew dishes but I'm not convinced that the price difference buys you much improvement in overall signal strength vs a Rocket for example.

I suspect what it gets you is greatly improved build quality and durability.

colebert

HW retry=4 ??

colebert

RB800 is a good choice for max performance. I learned the hard way about how routerboards can bottleneck your system. Thankfully it was long before i ever needed to put one on a tower. First, avoid Mikrotik wireless card. The SR71-15 is the premium 802.11n card in my opinion. I'm just one voice but ...

colebert

Looking forward to testing out beta2 on all my long PtPs over the weekend.

colebert

Because mikrotik does not design their boards to always accomodate the form factor ubiquiti cards, just their own. Not that this is a huge issue but I wonder if these companies ever even speak to each other or care if the other's products even work with their own.

colebert

I don't know what to tell you guys. It and 802.11n together work great for me and I recommend it to everyone. This forum is filled with these sort of success stories.

colebert

The thing is that the nstream and the pooling policy runs much more greater but it is still behind airmax :( Hope that routeros will squeeze much more (in near future) from the 802.11n standard that in this moment . Greets all! I am surprised to hear this. In all my testing (long distance PtP links...

colebert

I and many other people here use nstreme and 802.11n together without problem.

colebert

The thing is that the nstream and the pooling policy runs much more greater but it is still behind airmax :( Hope that routeros will squeeze much more (in near future) from the 802.11n standard that in this moment . Greets all! I am surprised to hear this. In all my testing (long distance PtP links...

colebert

As long as you have LOS and clear fresnel, 29dbi and 32dbi both will get the job done.

colebert

I was in your position with the RB600 and moving from XR5 to SR71-15. After much legwork I found that RB600 is the bottleneck on TCP speeds. When I moved to RB411AH platform I started getting 30mbps symmetrical TCP traffic on a 40MHz channel. This was with a 26mi PtP link (single chain.) So I sugges...

colebert

I'm pretty certain that 3 of my 6 R5nH cards are bad. They all do the same thing... one card transmits at normal rates and the other is 20-25db lower. For example, on a 18 mile link one will be at -47 and the other at -69. I have three of the six I ordered that do this. They also get very very hot t...

colebert

OK, so now how do we properly compensate. There doesn't seem to be a really good way to change the MCS power settings in winbox. Is this a command line fix only?

colebert

OK... so to the point. How do we fix our SR71-15 cards to account for the offest issue?

colebert

no sooner do I say that than I find out he answers.

http://www.ubnt.com/forum/showthread.php?t=19121

colebert

if you want to be sure u must ask in the ubiquiti forum to Mike specifically, but in XR's cards its showed the correct information,but in other brand doesnt, sorry, but mike is not helpful in this matter. i already started a thread over there and his answer was "ask mikrotik" which is why...

colebert

I am now using two RB411AH w/ matching SR71-15 on this link. Link is not perfect and signal strength bounces around. Not sure if it's an issue with the cards or what. But if I cap each side at 30M in bandwidth test then it stays solid. If I go higher the cards start out good and then bomb down to a ...

colebert

I can say I observed similar issues with at least one of my R5nH cards. Sig strength of about -10 less than the rx on what has always been a symetrical link in terms of signal strength. I don't have time to rigorously test all variables as it's a 26 mile link and would require all kinds of driving s...

colebert

I open the enclosure box, the wireless card is very very hot, it like the R5h, confirmed, card was burned. Aih~.... I have felt for myself how hot these cards get. I literally could not touch the card for 3 minutes after I pulled it. Not just uncomfortably hot. It could have easily given me first d...

colebert

I wonder if dual-pol, and dual chains would increase the N throughput over distance. I might try that soon, although with 1,000 customers on this backhaul, I may have to wait until an odd time to "play" with the link. Growing pains, right? I can do a long haul dual or triple pol test (if ...

colebert

It would be interesting how the R52Hn would perform in the same scenario using one chain. As it has much better sensivity it should give better performance. I can grab a couple next time I order, but on this link senstitivty shouldn't be the problem as I should be a solid -63 using these cards on b...

colebert

So far, not great. Alot of my time has been occupied riguring out whether some of the cards I ordered are bad. I get strange signal strength readings that bounce all over the place and the cards get incredibly hot. I don't want to say anything conclusive but so far I have seen nothing to indicate th...

colebert

Hey Colebert have you found any luck with your situation? I just switched out 2 XR5's on a 12 mile link for 2 SR71-15. The "P Throughput" says 109226kbpx, yet when I push even just UDP tests between the 2, I only peak up to MAYBE 60Mbps. Signal went from -58 with XR5's to -67db with SR71-...

colebert

Yes. Turn down the power until it is in the -50s. That is more thn enough for optimal performance.

colebert

I ordered five units Saturday and should be able to test them later this week on my long ptp links. I will report back when I have more information.

colebert

Am I correct in assuming that I pick a channel, say 5800, and then get a filter to block out all other channels? Sorry, I missed this part. No, that's not how it works. Channels are totally arbitrary distinctions. Filters don't know anything about channels, just frequencies. If you get a 5.8Ghz fil...

colebert

really 30-40%, wow thats alot, why is that? thought it was only 2db for the centre channel?

-3db is half so -2db would be 2/3rds of 50% which is 33%

colebert

OP, are you me? I also have a 26 mile link I'm trying to get working with 802.11n.

Definitely nstream
Definitely don't both filling out the antenna gain and such
Turn on adaptive noise immunity for "ap & client mode" on both sides

colebert

I don't know what your application is so I can't acess why and if you need them. But you buy filters with a center frequency and then a range around them. Say a filter with a 5.8GHz center with a 200MHz range would mean the filter would "pass" 5.6GHz to 6.0GHz. Anything outside of that get...

colebert

We're doing completely different things with our cards. I'm strictly long-distance PtP and you're trying to connect multiple clients. So I'm not sure how much help my findings are going to be. You probably should do what I'm doing... shell out for every possible solution (SR71A, SR71-15, R5nH, R52nH...

colebert

I am just starting to play with N equipment. I've tried both SR71-A and SR71-15. I have achieved a working MCS7 link on my 50km 1x1 link with the SR71-15s. I originally used the SR71-As and they did not work, but I am not sure I didn't have a bad card and/or know what I was doing. I originally was u...

colebert

I asked at the UBNT forum and they said to ask Mikrotik. I'm having a hard time understanding the 802.11n competely. Here's what I do know. The same link using the same boards and same ROS version produces a stable -55dBm link with a pair of XR5s @ 48mbps. ROS says that speed is +24dBm on my XR5. At...

colebert

I have an SR71-15 in a RB600A running ROS 4.6. The Ubiquiti datasheet lists power specs for the various modes. (http://ubnt.com/downloads/sr71_15_ds.pdf) For example, MCS7/MCS15 lists 19dBm. But in ROS the default power rates listed for the card put MCS7/MCS15 at 13dBm. Can I safely raise this power...

colebert

turn on wpa2, there is no loss in bandwidth as far as I can tell.

where do you get 1.1 degree beamwidth antennas?

They are 6GHz waveguide fed andrew dishes I've underbuilt with Mikrotik.

colebert

Sorry to hijack this somewhat, but I have wondered about PtP security as well. My PtPs are hundreds of feet in the air, go for an average of 30 miles each, and use dishes with a 1.1 degree beamwidth. Let's assume I didn't hide my SSID, didn't make access lists, and didn't use encryption. How could s...

colebert

Just make sure whatever you buy is Verizon branded. If you buy alot of used don't be surprised to get some equipment that isn't clear to be reactivated due to outstanding bills or being reported stolen. Just file a dispute with paypal and keep on going. Most of the equipment will be fine. Activating...

colebert

Or is my Verizon rep being, um, less than forthcoming about buying the UM175 from someone other than him? I always recommend buying your equipment from ebay. You stay out of 2yr contracts and basically end up paying the same as you would if you had gotten it "subsidized" through Verizon. ...

colebert

Want to update this. It is funny how much 7 months of tesing and experience with underbuilding mikrotiks changes your perspective. First, as others mentioned, I needed to filter the very powerful licensed 6GHz signals away from my 5GHz radios. So I bought a bunch of l-com bandpass filters and the pr...

colebert

I have been dealing with this issue lately as well. I wanted to use on RB600A w/ 3 XR5s on a daughter board. Running the XR5s in the same box creates large issues. Each card can "see" the other card w/ -40 to -50 signal strength. Not good. Ended up separating to 1:1 ratio of XR5 to Routerb...

colebert

I'm very sure it's your power supply. I have been playing with RB600's w/ daughterboard and 3x XR5s. If I am not feeding it 48V/1A POE it will power cycle as soon as I start running much traffic through even ONE of the three links. Get a power adapter with some juice... either 48V/1A or 24V/2A

colebert

I want to create a short (2-3 mile) PtP link using XR9s. One end will go up maybe 200ft on a tower. The other end will be on top of a small building (maybe 30-40ft.) I have a budget for the tower climbers but my company is very adverse to paying for future climbers so any problems that require them ...

colebert

I had a working RB230 on 3.30. I saw that the new 4.2 is final so I decided to upgrade. I followed these steps: 1. Upgraded my license key to to the new format 2. Entered the system commands in telnet to upgrade my BIOS/firmware 3. Moved the "combined" package for 4.2 into the CF card thro...

colebert

If your CCQ stays at 100%/100% on both sides while you are doing your TCP tests then we can safely rule out a link issue.

I would then look at perhaps doing a bandwidth test using devices other than the units themselves.

Also, post more about your config and settings.

colebert

Tested Link #2 and Link #3 yesterday Both ran solid 100% CCQ @54mbps. Tested with TCP & 128bit AES WPA2 encryption enabled LINK #2 (40km): AtoZ=46mbps / ZtoA=46mbps / Bidirectional=60mbps total / power levels between -49 & -53 LINK #3 (38km): AtoZ=46mbps / ZtoA=46mbps / Bidirectional=60mbps ...

colebert

Are you sure my dish is only adding about 30db? Specs I had from Andrew show it is a 41db dish in the 5.9-7.0 range. Would there be that big of drop off down to where my Mikrotiks are living in the 5.7-5.8GHz range? I'm actually getting -53 through -57 on my link @ 36mbps w/ full power. So your free...

colebert

Ok, just got back from testing. Here is what I have discovered. I think at least one of my original R5H radios were bad. When I replaced the R5H in my master unit with a new R5H the issues with the fluctuating signal strengths disappeared. I also added a 5.8GHz bandpass filter to each side at the sa...

colebert

Can your turn off the 6.9GHz system while you do your testing?
It's a good way to isolate the problem.

I considered that, but I don't want to disrupt the link unless it is my last troubleshooting option. I'm going to try different radios and a bandpass first. Thank you for your suggestion.

colebert

Hey Matt, I brought a picture of the general configuration of our sites. Each site has two microwave radios operating somewhere between 6.5-6.9GHz depending on the license for each link. One receives the signal from the previous site and then the other transmits the signal to the next site. It is on...

colebert

Yes, there is a 2 port circulator on every waveguide. One for the 5.8 and one for the 6.5. We recently tested TrangoLink45 units in an underbuild scenario and it worked well without any filtering, etc. Our 6GHz microwave equipment did not suffer any ill-effects... they are old-school analog video mi...

colebert

Why would you directly connect two radios together with a piece of coax? I suspect their output amps are blown but it is possible they survived if they have some kind of protection built in for that. Tom Because I wanted to test them so I would know how to create the link prior to going out to the ...

colebert

I attached a screenshot of my status window. The TX side is going bananas... between -70 and -35 and constantly fluctuating. The RX side stays consistent between -47 and -52. CCQ is always low. Once, when throttling all the way down to 6mbps-only with Nstreme and max power I got 98%/60% CCQ. I canno...

colebert

Would like some feedback/suggestions on some problems I'm having creating a point to point link. EQUIPMENT : Two RB433AH Routerboards w/ 3.27 firmware & R5H wireless cards. PATH PROFILE: 42km (26mi). Clear Fresnel and -100 or better noise floor ANTENNAS & CABLES: 10ft Andrew Parabolic (V pol...

colebert

Thank you for your reply. Ok, so maybe that won't work. Should there be any problem with burn out putting the 5.8 on the same waveguide as the 6.5-7.0GHz frequencies without a bandpass? I would certainly like to use separate dishes but tower climbers cost far more money than any parts I can install ...

colebert

First time Mikrotik user. Excellent looking product! I have bought two RB433AH units to test a PtP relay (over 200 miles in total distance) I am attempting to implement for my company. That distance is broken into a series of six relay links (between 25 and 40 miles each) that connect our branch off...

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