WLC 5508 APs showing Line Protocol Down

[seanallanmurphy]

I have a WLC 5508 (software version 7.5.102.0) and it has 175 APS (mixture of 1131, 1142, 1602, 2602).  Recently I've noticed that

about 40 of those APs don't work on the 2.4G Dot11Radio0.  sh int dot11 0 shows me:

Dot11Radio0 is up, line protocol is down

  Hardware is 802.11N 2.4GHz Radio, address is 1833.9d0c.2180 (bia 1833.9d0c.2180)

  MTU 1500 bytes, BW 54000 Kbit/sec, DLY 1000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output 00:00:00, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/9355/42086/0 (size/max/drops/flushes); Total output drops: 3769399

  Queueing strategy: fifo

  Output queue: 0/30 (size/max)

  5 minute input rate 11000 bits/sec, 13 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     150800958 packets input, 597188558 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 input packets with dribble condition detected

     217132697 packets output, 1132963042 bytes, 0 underruns

     55238 output errors, 0 collisions, 8 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

I've tried restarting the interface,to no avail, but rebooting the whole AP does bring it back up, but I expect that's a solution to the symptom, not the problem.

[Jon Marshall]

Sean

Where can I start looking to figure out why some of these radios just won't work?

You could try the Wireless forums

Seriously though you would probably get help more quickly if you moved this post to one of those forums.

Jon

[Jon Marshall]

Sean

Sorry i should have included a link to the right forums. This is the Small Business forum and you need the other Wireless forums as they deal with the WLC etc. -

https://supportforums.cisco.com/community/netpro/wireless-mobility

Jon

[Jon Marshall]

Sean

I'm not sure how you have done it but you have ended up posting to the Portuguese Wireless forums

I don't mean to hassle you,  just wanted to be sure you got the help you needed.

Jon

[seanallanmurphy]

HOLY MOTHER OF PEARL WHY IS THIS SO HARD?!

[seanallanmurphy]

This is not a friendly interface.  Every time I move it to "Wireless - Mobility" i end up somewhere non-english.

[seanallanmurphy]

this is as close as I can get it. Everywhere else is greyed out.

[Jon Marshall]

Sean

HOLY MOTHER OF PEARL WHY IS THIS SO HARD?!

Glad you got there in the end. I really hope you get an answer now as i'll feel a bit stupid if you don't

Jon

[Sandeep Choudhary]

Paste the output of these commands:

From WLC: sh sysinfo

From AP: sh version

console AP and paste the entire boot process here for one of them AP

Regards

[Sandeep Choudhary]

Also Check these:

1. Choose Wireless > 802.11a/n or 802.11b/g/n > Network

Select the 802.11a (or 802.11b/g) Network Status check box to enable the 802.11a or 802.11b/g band.

2. Wireless > Access Points > All APs then click on specific AP and make sure admin status is enable.

if you are using Power INjector then

Go to Wireless > Access Points > All AP’s > Click on specific AP then go to  Advanced and check the Power Injector state.

Reagrds

Dont forget to rate helpful posts

[Rasika Nayanajith]

Hi Sean,

There are certain related bugs of this version. You may need to check whether you are hitting one these. I would suggest staying in 7.4.121.0 code would be a good idea unless you require new features available in 7.5 or 7.6.

CSCui66891:Marvell-based radio goes down due to stuck multicast packets in driver
Symptom:
AP's radio interface goes down and does not recover on its own without an AP reboot.
Conditions:
With releases 7.2.103.0 - 7.2.115.2, 7.3.101.0 - 7.3.112.0, and 7.4.100.0 - 7.4.110.0, this bug applies to all Marvell-based 802.11n Cisco Aironet access points *except* the 1140, 1040, and certain mesh APs.
With releases 7.5.90.0 - 7.5.102.0, this bug applies to *all* Marvell-based 802.11n Cisco Aironet access points.
Workaround:
None. Reboot the AP.
Known Affected Releases(6)
7.6(1.52)
7.6(1.50)
7.5(102.0)
7.6(1.226)
7.6(1.95)
15.2(4)JA
Known Fixed Releases(10)
10.1(0.74)
7.6(1.55)
7.5(102.8)
10.1(100.0)
15.2(4)JN
7.6(1.103)
10.1(11.5)
7.4(111.7)
15.2(4)JB
7.4(121.0)

CSCum14069: AP1600/2600 radio down with 7.5.102.0 release
Symptom:
[AIR-CAP1602I-Q-K9 (AC power supply) ]---------[Catalyst switch]------------[AIR-CT5508-K9 (7.5.102.0)]
[AIR-CAP1602I-Q-K9 (PoE) ]----[AIR-PWRINJ5=]-----[ Catalyst switch]------------[AIR-CT5508-K9 (7.5.102.0)]
[AIR-CAP1602I-Q-K9 (AC power supply) ]---------[non-Cisco non-PoE switch]------------[AIR-CT5508-K9 (7.5.102.0)]
AP1600/2600 radios never go UP on above topology if the Catalyst switch was running older IOS such as c3750-ipservices-mz.122-25.SEB4
Conditions:
WLC release 7.5.102.0 specific issue.
AP1600/2600 specific issue.
Older Catalyst IOS software (e.g. 12.2(25)SEB4)
non-Cisco 3rd party switch
Workaround:
Enable "Pre-standard 802.3af switches" option on AP from WLC GUI;
WIRELESS => Access Points => All APs => target AP name => Advanced tab => Power Over Ethernet Settings
This option is required to workaround this problem even if you don't have Pre-standard 802.3af switch nor you're using AC adapter/Power Injector.
Known Affected Releases:(1)
7.5(102.0)
Known Fixed Releases:(1)
7.5(102.18)

HTH

Rasika

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