Controllerless Networks

did anyone observe this strange behaviour?

my AP mesh point continue to reboot every 20 minutes

 

IAP-175 OS version: 6.2.1.0-3.3.0.2_38733

 

Thank you

Usually this happens due to poor RF connection quality from the mesh portal to the mesh point. Could I understand if this is a new AP that got installed or has it been working for a while and just started to have this problem?

Sent from my iPhone

It has been working good for a while....so i can't understand the reason of this behavour.

Mesh portal and mesh point are 50 meters and full visible to each other. 

Yes i guess for some reason there is poor RF connection. 

do you know if there is something i can setup to mitigate this? 

You probably need to work with support, or have someone take a look at your setup.  If there is a hidden source of interference or if the antennas managed to be come unaligned, it could create the issues you mention.

 

Thank you ,

 

about alignement it's not an issue because i  use a couple of omni 5Ghz.

about interference...is it capable or not IAP 175 to change channel if detects a source of interference?

could you please tell me some smart commang to troubleshoot it?

i used to work with Aruba MSR and trobleshooting with IAP i found it very difficult.

 

thank you

run the comand show version

 

aruba-ap# show version
Aruba Operating System Software.
ArubaOS (MODEL: 105), Version 6.3.1.1-4.0.0.1
Website: http://www.arubanetworks.com
Copyright (c) 2002-2013, Aruba Networks, Inc.
Compiled on 2013-11-26 at 12:32:36 PST (build 41049) by p4build

AP uptime is 5 days 18 hours 48 minutes 51 seconds
Reboot Time and Cause: AP rebooted Tue Jan 7 20:56:34 UTC 2014; Image Upgrade Successful
aruba-ap#

Hi,

 

Let me repeat the phenomenon:

mesh point (IAP-175) running 38733 build, rebooted every 20 minutes because of mesh link failure. And the mesh portal is IAP-105 running 41049. Right?

 

Then let 's check:

1. check the antenna connectivity

2. run below comands on portal:

    show running-configuration

    show ap-env

 

    It is better, if following comands can be run right after IAP175 rebooting. If not, the outputs of these commands are also helpful

    show ap mesh neighbours

    show log debug

    show ap arm history

    show ap arm rf-summary

    

3. run below commands on that IAP-175, if possible,

    show ap-env

    show ap mesh neighbours

mesh point and mesh portal are both IAP-175, and since this morning, i upgraded both to:

6.3.1.2-4.0.0.2_41506

 

but every 20-15 min ore sometimes more 40 min the mesh point reboots. now it's not so regular.

 

I suspect DFS issue. Is there a way to turn it off (for a while) my regulatory domain is Europe.

 

that's AP arm histor on mesh portal:

 

Interface :wifi0
ARM History
-----------
Time of Change Old Channel New Channel Old Power New Power Reason
-------------- ----------- ----------- --------- --------- ------
2014-01-14 13:30:47 116+ 124+ 27 27 M
2014-01-14 13:11:29 100+ 116+ 27 27 R
2014-01-14 13:11:18 132+ 100+ 27 27 R
2014-01-14 13:10:47 108+ 132+ 27 27 R
2014-01-14 13:08:09 116+ 108+ 27 27 R
2014-01-14 13:00:36 124+ 116+ 27 27 R
2014-01-14 12:34:57 116+ 124+ 27 27 R
2014-01-14 12:06:54 100+ 116+ 27 27 R
2014-01-14 12:06:16 100+ 100+ Max 27 P-

 

Mesh: portal:

 

sh ap mesh neighbours

Neighbor list
-------------
MAC Portal Channel Age Hops Cost Relation Flags RSSI Rate Tx/Rx A-Req A-Resp A-Fail HT-Details Cluster ID
--- ------ ------- --- ---- ---- -------- ----- ---- ---------- ----- ------ ------ ---------- ----------
d8:c7:c8:02:47:f9 d8:c7:c8:02:46:98 116+ 1 1 7.00 C 9m:39s HLK 49 270/270 1 1 0 HT-40MHzsgi-2ss a2fdabcb9231957da75a0d509eb8d8b

 

after a while...

 

sh log wireless

[..]
Jan 14 15:31:31 sapd[1121]: <404076> <WARN> |AP wisper_montefiore_comune_ap2@10.41.9.3 sapd| AM d8:c7:c8:02:46:98: Radar detected on interface wifi0, channel 116, typeid 38

 

after a while...

 

sh ap mesh link

Neighbor list
-------------
MAC Portal Channel Age Hops Cost Relation Flags RSSI Rate Tx/Rx A-Req A-Resp A-Fail HT-Details Cluster ID
--- ------ ------- --- ---- ---- -------- ----- ---- ---------- ----- ------ ------ ---------- ----------
d8:c7:c8:02:47:f9 d8:c7:c8:02:46:98 100+ 0 1 7.00 C 3m:43s HLK 54 300/300 1 1 0 HT-40MHzsgi-2ss a2fdabcb9231957da75a0d509eb8d8b

 

Jan 14 15:58:42 sapd[1121]: <404088> <WARN> |AP wisper_montefiore_comune_ap2@10.41.9.3 sapd| AM d8:c7:c8:02:46:98: ARM HT Radar Detected Trigger Current Channel old 116+ new 100+/9
Jan 14 16:18:32 sapd[1121]: <404076> <WARN> |AP wisper_montefiore_comune_ap2@10.41.9.3 sapd| AM d8:c7:c8:02:46:98: Radar detected on interface wifi0, channel 100, typeid 33
Jan 14 16:18:32 sapd[1121]: <404088> <WARN> |AP wisper_montefiore_comune_ap2@10.41.9.3 sapd| AM d8:c7:c8:02:46:98: ARM HT Radar Detected Trigger Current Channel old 100+ new 116+/9

 

and now...no connectivity. what's happening?

 

ARM History
-----------
Time of Change Old Channel New Channel Old Power New Power Reason
-------------- ----------- ----------- --------- --------- ------
2014-01-14 16:18:32 100+ 116+ 27 27 R
2014-01-14 15:58:42 116+ 100+ 27 27 R
2014-01-14 15:29:28 116+ 116+ Max 27 P-

 

 

 

 

It looks like you are using DFS channels and are encountering Radar.  What is your regulatory domain?

 

 

Europe

There is no europe regulatory domain.  It has to be a country.

Actually, you might have to switch to 2.4 ghz for mesh.  From the output it looks like you have radar on ALL of your available channels:

 

2014-01-14 13:11:29 100+ 116+ 27 27 R
2014-01-14 13:11:18 132+ 100+ 27 27 R
2014-01-14 13:10:47 108+ 132+ 27 27 R
2014-01-14 13:08:09 116+ 108+ 27 27 R
2014-01-14 13:00:36 124+ 116+ 27 27 R
2014-01-14 12:34:57 116+ 124+ 27 27 R
2014-01-14 12:06:54 100+ 116+ 27 27 R

 

These are the available channels:

 

802.11a 40MHz (outdoor)  100-104 108-112 116-120 124-128 132-136

 

Sorry...Regulatory domain: Italy

 

>Actually, you might have to switch to 2.4 ghz for mesh

 

how can i do that. do you have a link on a document that explain this?

 

Many Thanx

---

@lepida wrote:

Sorry...Regulatory domain: Italy

 

>Actually, you might have to switch to 2.4 ghz for mesh

 

how can i do that. do you have a link on a document that explain this?

 

Many Thanx

---

Let us check something in the background to make sure a code upgrade will not help it.  Are you near a police station, hospital or airport where there could be radar?

 

a little town over the hills. 13km far from the sea and an from a little harbour

 

and 14km far from an airport!

Allright.  What you could do is disable "Wide" channels by going to RF> ARM and changing wide channel bands to "None".  That could give you more channels to use.  This could also drop your mesh throughput, but at this point, we are trying to keep your mesh link up..

 

ok,

 

today i will try. Thank you. But only one more thing . I understand R, radar detact, but i can't undestand why IAP change channel if found one channel empy (M). Furthermore...i still can't reach the IAP

 

wisper_montefiore_comune_ap2# sh ap arm history

Interface :wifi0
ARM History
-----------
Time of Change Old Channel New Channel Old Power New Power Reason
-------------- ----------- ----------- --------- --------- ------
2014-01-15 08:33:22 116+ 124+ 27 27 M
2014-01-15 08:27:38 124+ 116+ 27 27 M
2014-01-15 08:21:38 116+ 124+ 27 27 M
2014-01-15 08:13:57 124+ 116+ 27 27 M
2014-01-15 08:08:12 100+ 124+ 27 27 M
2014-01-15 08:07:49 124+ 100+ 27 27 M
2014-01-15 08:00:44 108+ 124+ 27 27 M
2014-01-15 07:53:57 124+ 108+ 27 27 M
2014-01-15 07:40:15 116+ 124+ 27 27 M
2014-01-15 07:38:50 132+ 116+ 27 27 R
2014-01-15 07:38:49 116+ 132+ 27 27 R
2014-01-15 07:30:44 100+ 116+ 27 27 R
2014-01-15 07:23:31 100+ 100+ 24 27 P+
2014-01-15 07:16:26 108+ 100+ 24 24 R
2014-01-15 07:09:57 124+ 108+ 24 24 R
2014-01-15 07:03:05 124+ 124+ 21 24 P+
2014-01-15 06:57:16 124+ 124+ 27 21 P-
2014-01-15 06:49:23 116+ 124+ 27 27 R
2014-01-15 06:41:29 100+ 116+ 27 27 R
2014-01-15 05:34:19 100+ 100+ 24 27 P+
2014-01-15 05:29:19 116+ 100+ 24 24 M
2014-01-15 05:28:18 116+ 116+ 21 24 P+
2014-01-15 05:23:14 124+ 116+ 21 21 M
2014-01-15 05:20:52 124+ 124+ 18 21 P+
2014-01-15 05:16:35 116+ 124+ 18 18 M
2014-01-15 05:16:21 116+ 116+ 24 18 P-
2014-01-15 05:09:54 124+ 116+ 24 24 M
2014-01-15 05:08:37 124+ 124+ 21 24 P+
2014-01-15 05:04:17 116+ 124+ 21 21 M
2014-01-15 05:03:59 116+ 116+ 27 21 P-
2014-01-15 04:51:03 100+ 116+ 27 27 R
2014-01-15 01:59:45 124+ 100+ 27 27 R

Empty channel is when there is no activity on a channel, meaning it is better than the one that the access point is currently on.  Do your problems occur at a specific time of day or night?  Is there a pattern?

it was the one in this topic. i didn't understand why it was jumping from one frequence to another, giving me no stable mesh connectivity, although it wasn't find a radar, but only empty channels

 

2014-01-15 08:33:22 116+ 124+ 27 27 M
2014-01-15 08:27:38 124+ 116+ 27 27 M
2014-01-15 08:21:38 116+ 124+ 27 27 M
2014-01-15 08:13:57 124+ 116+ 27 27 M
2014-01-15 08:08:12 100+ 124+ 27 27 M
2014-01-15 08:07:49 124+ 100+ 27 27 M
2014-01-15 08:00:44 108+ 124+ 27 27 M
2014-01-15 07:53:57 124+ 108+ 27 27 M

 

anyway i follow your suggestion and turn off wide channel bands. now for the first time mesh is stable for 4 hours!

 

Many thanx