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jcremin
join:2009-12-22
Siren, WI

jcremin

Member

MT/UBNT issues

I'm having a strange issue on one of my towers. I have an MT RB711UA-2HnD running ROS 5.22 on the tower side, hooked to a 120 degree sector. Only about 4 clients on this antenna.

The most important issue is that a client I installed on Friday keeps disconnecting from the tower after a few hours, and simply never comes back on. The CPE is a UBNT NSM2. A power cycle does get it working again, but only for a couple hours. I tried upgrading to the newest UBNT firmware, and that didn't help at all. Then today I went out and swapped the POE and NSM2 figuring that it must have been a bad NSM2. I could log into the unit from the LAN side and everything looked fine, except I couldn't see any AP's in the scan and it wouldn't connect to the tower. Almost like the wireless had just quit working. Assumed it was a defective CPE.

Here we are a few hours later, and the new NSM2 that I installed earlier today has disappeared again, and I can't think of any reason why. The one I installed today wasn't actually new. It was a used one which a client had been using for nearly 2 years without an issue until they moved last week. I intentionally used this one because I knew it worked. Only difference is a new house on a different tower.

Can anyone think of any reasons this might happen?

On a slightly different note, I do see a lot of re-associations on this AP for no reason. I see it on all of my MT devices running 5.x, but unfortunately I can't downgrade to 4.x on the newer hardware. It's like clients just re-associate, even though they were fine on an older firmware version. It does appear that a couple of the other clients re-associated right around the time this one client disconnects, but the one client is the only one that never comes back.

I can't figure it out and it just doesn't make sense to me. Anyone else ever see anything similar?
wirelessdog
join:2008-07-15
Queen Anne, MD

wirelessdog

Member

I had major issues using Mikrotik on the AP side with Ubiquiti clients. I could never get a straight answer out of either as to why the issues I was having were happening. In the end I started using UBNT on the AP side as well. I was having frequent disconnect issues for no reason, issues with RTS not seeming to working properly and major throughput issues.
ksantano
join:2014-02-10

ksantano to jcremin

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to jcremin
Try turning the output power down on the cpe
jcremin
join:2009-12-22
Siren, WI

jcremin to wirelessdog

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to wirelessdog
said by wirelessdog:

I had major issues using Mikrotik on the AP side with Ubiquiti clients. I could never get a straight answer out of either as to why the issues I was having were happening. In the end I started using UBNT on the AP side as well. I was having frequent disconnect issues for no reason, issues with RTS not seeming to working properly and major throughput issues.

Thanks for the info. I think my next step will be to simply try swapping the AP for a rocket and see what happens. Are you using the standard M2 rockets, or the titaniam ones? Any advantages of using the Ti?
jcremin

jcremin to ksantano

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to ksantano
said by ksantano:

Try turning the output power down on the cpe

I can try that, but I'm curious about your theory behind it? Mainly because the NSM2 I replaced the original one with didn't have a single setting changed from when I took it off the old client's roof other than changing the radio name and pppoe login info.
wirelessdog
join:2008-07-15
Queen Anne, MD

wirelessdog to jcremin

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to jcremin
Actually at that legacy site I put up a pico connected to the HPOL omni since I didn't need dual pol.
TheHox
join:2012-05-31

TheHox to jcremin

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to jcremin
»community.ubnt.com/t5/Ge ··· p/358613

Ti's have had issues getting bricked supposedly a new batch is on the boat though.. I'd avoid them for now.
jcremin
join:2009-12-22
Siren, WI

jcremin to wirelessdog

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Ahh, gotcha.
jcremin

jcremin to TheHox

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Sounds good. I haven't really looked at the Ti's in any detail, but at a glance, I didn't see anything that really looked like it was worth the extra $$$ to me.
wirelessdog
join:2008-07-15
Queen Anne, MD

wirelessdog to jcremin

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to jcremin
I think the main advantage was the gige port which makes a difference if you have a clean 40mhz link and your speed limitation is the Ethernet port... I read somewhere about an extra 20% of overall throughput as well FWIW