topic Re: interface(802/11a) is down in WLC5500 in Wireless

interface(802/11a) is down in WLC5500

wfqk — Mon, 05 Jul 2021 15:11:09 GMT

Hi, WLC5500 has one interface(802/11a) down, while other(802.11b/g) are up. Please see picture attached, which i got from WIRELESS ----> Interface.

I checked internet and got a similar case with mine( see below link). but my WLC and AP are all located in USA.

Thank you

(Cisco Controller) >show ap inventory NABC

NAME: "Cisco AP" , DESCR: "Cisco Wireless Access Point"
PID: AIR-LAP1131AG-A-K9, VID: V01, SN: FTXxxxxxx

https://supportforums.cisco.com/t5/other-wireless-mobility-subjects/802-11a-n-ac-radios-down/td-p/2411161

Re: interface(802/11a) is down in WLC5500

Flavio Miranda — Tue, 30 Jan 2018 20:02:27 GMT

I had a similar problem but different AP model. In my case it was hardware problem.

As you say the country is correct for this AP, I suppose this can be a faulty AP as well.As the Operational status is enabled.

-If I helped you somehow, please, rate it as useful.-

Re: interface(802/11a) is down in WLC5500

wfqk — Tue, 30 Jan 2018 20:15:17 GMT

Thank you so much for your reply. i am going to replace this AP with new one. BTW i am asking an very entry level question. Can i directly remove the old AP and connect new AP to that same port without any configuration for the new AP and WLC. After the new AP is up, I would like to change some info for the new AP via WLC, is that Ok. Thank you.

Re: interface(802/11a) is down in WLC5500

Leo Laohoo — Tue, 30 Jan 2018 23:27:53 GMT

Post the complete output to the WLC command "sh sysinfo".

Re: interface(802/11a) is down in WLC5500

wfqk — Wed, 31 Jan 2018 00:40:46 GMT

(Cisco Controller) >show sysinfo

Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.0.140.0
Bootloader Version............................... 1.0.20
Field Recovery Image Version..................... 7.6.101.1
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
Build Type....................................... DATA + WPS

System Name...................................... NABC
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.9.1.9.1.106
Redundancy Mode.................................. SSO
IP Address....................................... 10.1.1.1
IPv6 Address..................................... ::
Last Reset....................................... Software reset
System Up Time................................... 112 days 18 hrs 19 mins 26 secs
System Timezone Location......................... (GMT -5:00) Eastern Time (US and Canada)
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180

Configured Country............................... US - United States

Operating Environment............................ Commercial (0 to 40 C)
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +40 C
External Temperature............................. +22 C
Fan Status....................................... OK

State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 3
Number of Active Clients......................... 775

Burned-in MAC Address............................ 6C:00:06:0D:0F:80
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
Maximum number of APs supported.................. 500
System Nas-Id.................................... NABC
WLC MIC Certificate Types........................ SHA1

Re: interface(802/11a) is down in WLC5500

Leo Laohoo — Wed, 31 Jan 2018 04:59:47 GMT

Is 802.11a radio enabled?

Re: interface(802/11a) is down in WLC5500

wfqk — Wed, 31 Jan 2018 05:12:39 GMT

Yes

Re: interface(802/11a) is down in WLC5500

Leo Laohoo — Wed, 31 Jan 2018 06:55:47 GMT

Console into the AP and reboot the AP. Post the entire boot-up process.

Re: interface(802/11a) is down in WLC5500

Manish Mathur — Wed, 31 Jan 2018 09:28:12 GMT

Can u provide 2 informational points:

1. Go to the advanced tab on the AP and get a screenshot of Regulatory domains and Country code.

2. Login to the AP CLI and get the output for "show controllers d1".

Thanks,

Manish

Re: interface(802/11a) is down in WLC5500

wfqk — Wed, 31 Jan 2018 20:24:26 GMT

Hi Manish, Thank you so much for your reply. The below are my answers to your question:

1. Go to the advanced tab on the AP and get a screenshot of Regulatory domains and Country code.

Please see the attached picture.

2. Login to the AP CLI and get the output for "show controllers d1".

I cannot login to the AP at this moment, but I can logon to its WLC. Am i able to logon to the AP via the WLC? or get the info via WLC?

Re: interface(802/11a) is down in WLC5500

Manish Mathur — Thu, 01 Feb 2018 03:27:45 GMT

The screenshot looks good to me.

You can run the command "show ap config 802.11a <AP name>" in the WLC.

and also get "show ap eventlog <AP name>" . This should be able to show the actual events on the AP.

Cheers

Manish

Re: interface(802/11a) is down in WLC5500

wfqk — Thu, 01 Feb 2018 04:38:43 GMT

Please see below ( some add info changed due to security)

(Cisco Controller) >show ap config 802.11a APName

Cisco AP Identifier.............................. 23
Cisco AP Name.................................... APName
Country code..................................... US - United States
Regulatory Domain allowed by Country............. 802.11bg:-A 802.11a:-AB
AP Country code.................................. US - United States
AP Regulatory Domain............................. -A
Switch Port Number .............................. 13
MAC Address...................................... 00:of:0e:0f:09:4a
IP Address Configuration......................... Static IP assigned
IP Address....................................... 10.1.1.10
IP NetMask....................................... 255.255.255.240
Gateway IP Addr.................................. 10.1.1.1
Domain...........................................
Name Server......................................
NAT External IP Address.......................... None
CAPWAP Path MTU.................................. 1485
DHCP Release Override............................ Disabled
Telnet State..................................... Disabled
Ssh State........................................ Disabled
Cisco AP Location................................ 333
Cisco AP Floor Label............................. 0

--More-- or (q)uit
Cisco AP Group Name.............................. default-group
Primary Cisco Switch Name........................ NABC
Primary Cisco Switch IP Address.................. 10.1.1.3
Secondary Cisco Switch Name......................
Secondary Cisco Switch IP Address................ Not Configured
Tertiary Cisco Switch Name.......................
Tertiary Cisco Switch IP Address................. Not Configured
Administrative State ............................ ADMIN_ENABLED
Operation State ................................. REGISTERED
Mirroring Mode .................................. Disabled
AP Mode ......................................... Local
Public Safety ................................... Disabled
AP SubMode ...................................... Not Configured
Remote AP Debug ................................. Disabled
Logging trap severity level ..................... informational
KPI not configured ..............................
Logging syslog facility ......................... kern
Wireless Logging State .......................... Disabled
S/W Version .................................... 8.0.140.0
Boot Version ................................... 12.3.8.0
Mini IOS Version ................................ 3.0.51.0
Stats Reporting Period .......................... 180
Stats Collection Mode ........................... normal

--More-- or (q)uit
LED State........................................ Enabled
PoE Pre-Standard Switch.......................... Enabled
PoE Power Injector MAC Addr...................... Disabled
Power Type/Mode.................................. Power injector / Normal mode
Number Of Slots.................................. 2
AP Model......................................... AIR-LAP1131AG-A-K9
AP Image......................................... C1130-K9W8-M
IOS Version...................................... 12.4(25e)JAP10$
Reset Button..................................... Enabled
AP Serial Number................................. FTX1233T24C
AP Certificate Type.............................. Manufacture Installed
AP User Mode..................................... AUTOMATIC
AP User Name..................................... wwwabc
AP Dot1x User Mode............................... Not Configured
AP Dot1x User Name............................... Not Configured
Cisco AP system logging host..................... 255.255.255.255
AP Up Time....................................... 24 days, 00 h 48 m 25 s
AP LWAPP Up Time................................. 24 days, 00 h 02 m 53 s
Join Date and Time............................... Wed Jun 21 23:58:00 2017
Join Taken Time.................................. 0 days, 00 h 02 m 51 s

Attributes for Slot 1
Radio Type................................... RADIO_TYPE_80211a

--More-- or (q)uit
Radio Subband................................ RADIO_SUBBAND_ALL
Administrative State ........................ ADMIN_ENABLED
Operation State ............................. DOWN
Operation State Down Cause................... Indicates that while the radio state should be updated on controller, no reset should be reported.
Operation State Down Code.................... RADIO_RC_NO_REPORT
Radio Role .................................. ACCESS
Radio Mode .................................. Local
CellId ...................................... 0

Station Configuration
Configuration ............................. AUTOMATIC
Number Of WLANs ........................... 3
Medium Occupancy Limit .................... 100
CFP Period ................................ 4
CFP MaxDuration ........................... 60
BSSID ..................................... 00:02:05:0f:cc:90
Operation Rate Set
6000 Kilo Bits........................... MANDATORY
9000 Kilo Bits........................... SUPPORTED
12000 Kilo Bits.......................... MANDATORY
18000 Kilo Bits.......................... SUPPORTED
24000 Kilo Bits.......................... MANDATORY
36000 Kilo Bits.......................... SUPPORTED

--More-- or (q)uit
48000 Kilo Bits.......................... SUPPORTED
54000 Kilo Bits.......................... SUPPORTED
Beacon Period ............................. 100
Fragmentation Threshold ................... 2346
Multi Domain Capability Implemented ....... TRUE
Multi Domain Capability Enabled ........... TRUE
Country String ............................ US

Multi Domain Capability
Configuration ............................. AUTOMATIC
First Chan Num ............................ 36
Number Of Channels ........................ 4

MAC Operation Parameters
Configuration ............................. AUTOMATIC
Fragmentation Threshold ................... 2346
Packet Retry Limit ........................ 64

Tx Power
Num Of Supported Power Levels ............. 8
Tx Power Level 1 .......................... 17 dBm
Tx Power Level 2 .......................... 15 dBm
Tx Power Level 3 .......................... 14 dBm

--More-- or (q)uit
Tx Power Level 4 .......................... 11 dBm
Tx Power Level 5 .......................... 8 dBm
Tx Power Level 6 .......................... 5 dBm
Tx Power Level 7 .......................... 2 dBm
Tx Power Level 8 .......................... -1 dBm
Tx Power Configuration .................... AUTOMATIC
Current Tx Power Level .................... 2
Tx Power Assigned By ...................... DTPC

Phy OFDM parameters
Configuration ............................. AUTOMATIC
Current Channel ........................... 149
Channel Assigned By ....................... DCA
Extension Channel ......................... NONE
Channel Width.............................. 20 Mhz
Allowed Channel List....................... 3
TI Threshold .............................. -50
DCA Channel List........................... Global
Antenna Type............................... INTERNAL_ANTENNA
Internal Antenna Gain (in .5 dBi units).... 8
Diversity.................................. DIVERSITY_ENABLED

--More-- or (q)uit

Performance Profile Parameters
Configuration ............................. AUTOMATIC
Interference threshold..................... 10 %
Noise threshold............................ -70 dBm
RF utilization threshold................... 80 %
Data-rate threshold........................ 1000000 bps
Client threshold........................... 12 clients
Coverage SNR threshold..................... 16 dB
Coverage exception level................... 25 %
Client minimum exception level............. 3 clients
Rogue Containment Information
Containment Count............................ 0

CleanAir Management Information
CleanAir Capable......................... No

++++++++++++++

(Cisco Controller) >show ap eventlog APName
AP event log download has been initiated
Waiting for download to complete

AP event log download completed.
======================= AP Event log Contents =====================
*Nov 29 19:33:38.767: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 7 AES-CCMP TSC replays
*Nov 29 19:33:48.198: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 15 AES-CCMP TSC replays
*Nov 29 19:33:54.467: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 3 AES-CCMP TSC replays
*Nov 29 19:34:01.823: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 14 AES-CCMP TSC replays
*Nov 29 19:34:16.430: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 3 AES-CCMP TSC replays
*Nov 29 19:34:24.801: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 4 AES-CCMP TSC replays
*Nov 29 19:34:31.172: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 3 AES-CCMP TSC replays
*Nov 29 19:34:39.566: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 7 AES-CCMP TSC replays
*Nov 29 19:34:48.967: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 2 AES-CCMP TSC replays
*Nov 29 19:34:58.358: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 1 AES-CCMP TSC replays
*Nov 29 19:35:20.301: %DOT11-4-CCMP_REPLAY: Client 1489.ad90.2333 had 1 AES-CCMP TSC replays

Re: interface(802/11a) is down in WLC5500

Manish Mathur — Thu, 01 Feb 2018 05:32:01 GMT

I noticed something :

In my AP (3700), the output is like:

Channel Width.............................. 20 Mhz
      Allowed Channel List....................... 36,40,44,48,52,56,60,64,100,
        ......................................... 104,108,112,116,120,124,149,
        ......................................... 153,157,161

Whereas your output shows:

Channel Width.............................. 20 Mhz
Allowed Channel List....................... 3

Why ? Are there other APs on the same WLC which are working fine on 5 GHz radio ? Can yu check , what all channels have you allowed/configured on 5 GHz DCA ? If this AP is in an AP-group , and you have mapped a RF-profile to it, please check the channels allowed in the RF-profile. If all of that is fine, please see if you can replace this AP once. May be a hardware issue in that case.

Cheers,

Manish

Re: interface(802/11a) is down in WLC5500

wfqk — Thu, 01 Feb 2018 14:48:39 GMT

Some of info in Allow Channel List are missing. It should be same as yours. Sorry.

We allow all channel go through and no specific AP group. All of other AP are working fine. I am going to replace it for trying. Thank you