Wireless Access

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Occasional Contributor II

Re: SSID disappears and after some minutes it appears again

I mean how long does the outage last and how often does it happen?

 

This occurs more than once in a day
The outage lasts from two minutes to 10 minutes
Note APs very hot

Highlighted
Guru Elite

Re: SSID disappears and after some minutes it appears again

Do all the SSIDs disappear or only one of them?


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Highlighted
Occasional Contributor II

Re: SSID disappears and after some minutes it appears again

All SSIDs

Highlighted
Guru Elite

Re: SSID disappears and after some minutes it appears again

How are you powering these access points?  What kind of switch?

 

Also, do you have the output of "show ap database"?


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Highlighted
Occasional Contributor II

Re: SSID disappears and after some minutes it appears again

2 Aruba 2540 

 

the switch providing power to APs 

 

(WLC) [mynode] #show ap database

 

AP Database

-----------

Name               Group    AP Type  IP Address     Status              Flags  Switch IP      Standby IP

----               -----    -------  ----------     ------              -----  ---------      ----------

e5:08  default  305      x.x.x.226  Up 15d:2h:33m:29s   2      y.y.y.y0.0.0.0

e9:10  default  305      x.x.x.225  Up 15d:9h:1m:37s    2      y.y.y.y0.0.0.0

e9:5e  default  305      x.x.x.224  Up 15d:10h:11m:37s  2      y.y.y.y0.0.0.0

f0:f2  default  305      x.x.x.222  Up 15d:12h:27m:23s  2      y.y.y.y0.0.0.0

f1:26  default  305      x.x.x.207  Up 15d:9h:52m:29s   2      y.y.y.y0.0.0.0

f4:ce  default  305      x.x.x.220  Up 15d:2h:22m:38s   2      y.y.y.y0.0.0.0

f5:d4  default  305      x.x.x.228  Up 15d:11h:7m:1s    2      y.y.y.y0.0.0.0

f6:b2  default  305      x.x.x.221  Up 15d:2h:22m:36s   2      y.y.y.y0.0.0.0

Bar-Room           default  305      x.x.x.218  Up 1d:18h:39m:0s    2      y.y.y.y0.0.0.0

Buffet             default  305      x.x.x.219  Up 15d:2h:53m:26s   2      y.y.y.y0.0.0.0

coiffure           default  305      x.x.x.201  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

G-Office           default  305      x.x.x.217  Up 1d:18h:38m:59s   2      y.y.y.y0.0.0.0

Guest-Area         default  305      x.x.x.216  Up 1d:18h:38m:59s   2      y.y.y.y0.0.0.0

Lounge-Area        default  305      x.x.x.215  Up 1d:18h:38m:59s   2      y.y.y.y0.0.0.0

Massage            default  305      x.x.x.227  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

Master-Living      default  305      x.x.x.214  Up 15d:2h:15m:24s   2      y.y.y.y0.0.0.0

Moroccan-Area      default  305      x.x.x.213  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

Mr. Hamdy          default  305      x.x.x.212  Up 15d:12h:27m:20s  2      y.y.y.y0.0.0.0

Mrs. Rania Office  default  305      x.x.x.211  Up 15d:9h:2m:37s    2      y.y.y.y0.0.0.0

Parking            default  305      x.x.x.202  Up 15d:12h:27m:22s  2      y.y.y.y0.0.0.0

Pool1              default  365      x.x.x.205  Up 14d:11h:16m:24s  2      y.y.y.y0.0.0.0

Port7              default  305      x.x.x.223  Down                2      y.y.y.y0.0.0.0

Room-1             default  305      x.x.x.210  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

Room-2             default  305      x.x.x.208  Up 1d:18h:39m:18s   2      y.y.y.y0.0.0.0

Room-3             default  305      x.x.x.209  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

Room-4             default  305      x.x.x.206  Up 1d:18h:39m:1s    2      y.y.y.y0.0.0.0

Room-5             default  305      x.x.x.204  Up 1d:18h:39m:0s    2      y.y.y.y0.0.0.0

Room-6             default  305      x.x.x.203  Up 1d:18h:39m:17s   2      y.y.y.y0.0.0.0

 

Flags: 1 = 802.1x authenticated AP use EAP-PEAP; 1+ = 802.1x use EST; 1- = 802.1x use factory cert; 2 = Using IKE version 2

       B = Built-in AP; C = Cellular RAP; D = Dirty or no config

       E = Regulatory Domain Mismatch; F = AP failed 802.1x authentication

       G = No such group; I = Inactive; J = USB cert at AP; L = Unlicensed

       M = Mesh node

       N = Duplicate name; P = PPPoe AP; R = Remote AP; R- = Remote AP requires Auth;

       S = Standby-mode AP; U = Unprovisioned; X = Maintenance Mode

       Y = Mesh Recovery

       c = CERT-based RAP; e = Custom EST cert; f = No Spectrum FFT support

       i = Indoor; o = Outdoor; s = LACP striping; u = Custom-Cert RAP; z = Datazone AP

       p = In deep-sleep status; m = Protocol Mismatch

       4 = WiFi Uplink

       r = Power Restricted; T = Thermal ShutDown; t = Temperature Restricted

 

Total APs:28

Highlighted
MVP Guru

Re: SSID disappears and after some minutes it appears again

Apologies if this has been asked already but are you able to provide the below output from an AP that is showing the problem?

 

#show ap debug system-status ap-name [AP NAME]

Do you have any packet loss from the Controller to the AP? If there is packet loss, heartbeats are lost which causes the AP to rebootstrap thus the radios go down for a short period of time. You'd see this in the logs too if it was an issue.

 

 


ACMP, ACSA, ACDX #985
If my post addresses your query, give kudos:)
Highlighted
Guru Elite

Re: SSID disappears and after some minutes it appears again

It looks like you have some DFS channels enabled:

ap regulatory-domain-profile "default"
    country-code EG
    valid-11g-channel 1
    valid-11g-channel 6
    valid-11g-channel 11
    valid-11a-channel 36
    valid-11a-channel 40
    valid-11a-channel 44
    valid-11a-channel 48
    valid-11a-channel 52
    valid-11a-channel 56
    valid-11a-channel 60                           
    valid-11a-channel 64
    valid-11a-channel 149
    valid-11a-channel 153
    valid-11a-channel 157
    valid-11a-channel 161
    valid-11a-channel 165

I would check the "show log wireless all" log and see if there are any radar events observed.  That would force an AP to another channel, but that AP would have to wait 10 minutes.  The behavior when an AP encounters radar is here:  https://community.arubanetworks.com/t5/ArubaOS-and-Controllers/CAC-period-warnings/td-p/12608/page/2


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
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Airheads Knowledgebase
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Remote Access Point Solution Guide
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ArubaOS 8 ViA VPN Solution Guide
Highlighted
Occasional Contributor II

Re: SSID disappears and after some minutes it appears again

Dear 

 

show log wireless all in the attached file 

 

Please read the log file and tell me what to do?

 

Highlighted
Occasional Contributor II

Re: SSID disappears and after some minutes it appears again

Dear 

 

show ap debug system-status ap-name in the attached file from same APs in my network 

Please read the debug file and tell me what to do?

Highlighted
Guru Elite

Re: SSID disappears and after some minutes it appears again

You have alot of channel changes.

 

Why did you change the ARM defaults?

 

   no 80MHz-support
    min-tx-power 12
    max-tx-power 18
    backoff-time 1800
    error-rate-threshold 80                         
    error-rate-wait-time 900
    channel-quality-aware-arm
    channel-quality-threshold 50
    channel-quality-wait-time 900
    cm-band-g-max-signal 10

 

If I could give you any advice it is to go to 20mhz channels by 

setting the "40MHz-allowed-bands" setting in the ARM profile to "none" so that you can avoid interference.   


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.5 User Guide
InstantOS 8.5 User Guide
Airheads Knowledgebase
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Remote Access Point Solution Guide
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