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891W wireless radio showing as 802.11b and inop

Brian Rapier
Level 1
Level 1

I have an 891w that started acting up recently.  Radio dot11 0 is reporting its a b radio.  When it is actually an n 2.4 radio.  Of course that radio is not allowing any clients to connect to it at this time.  I have tried updating the firmware to the latest, tried a hardware reset but still a nogo.  Any other ideas out there?

sh interface output.

Dot11Radio0 is up, line protocol is down

  Hardware is 802.11B Radio, address is 0000.0000.0000 (bia 0000.0000.0000)

  MTU 1500 bytes, BW 11000 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 never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/3000/0/0 (size/max/drops/flushes); Total output drops: 2

  Queueing strategy: fifo

  Output queue: 0/30 (size/max)

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

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

     0 packets input, 0 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

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 0 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

Dot11Radio0.1 is up, line protocol is down

  Hardware is 802.11B Radio, address is 0000.0000.0000 (bia 0000.0000.0000)

  MTU 1500 bytes, BW 11000 Kbit/sec, DLY 1000 usec,

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

  Encapsulation 802.1Q Virtual LAN, Vlan ID  1.

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

  Keepalive set (10 sec)

  Last clearing of "show interface" counters never

sh ver

Cisco IOS Software, AP801 Software (AP801-K9W7-M), Version 15.2(2)JA, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2012 by Cisco Systems, Inc.

Compiled Thu 23-Aug-12 06:16 by prod_rel_team

ROM: Bootstrap program is AP801 boot loader

BOOTLDR: AP801 Boot Loader (AP801-BOOT-M) Version 12.4(23c)JX, RELEASE SOFTWARE (fc1)

Crisis-Whitby-ap uptime is 1 hour, 41 minutes

System returned to ROM by power-on

System image file is "flash:/ap801-k9w7-mx.152-2.JA/ap801-k9w7-mx.152-2.JA"

Last reload reason:

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

cisco AP801AGN-A-K9        (PowerPC 8343) processor (revision B0) with 49142K/16384K bytes of memory.

Processor board ID FTX161683HL

PowerPC 8343 CPU at 400Mhz, revision number 0x0031

Last reset from power-on

1 Gigabit Ethernet interface

2 802.11 Radios

32K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address: 64:00:F1:CF:10:CA

Part Number                          : 73-11027-11

PCA Assembly Number                  : 800-28808-11

PCA Revision Number                  : B0

PCB Serial Number                    : FOC161271MJ

Top Assembly Part Number             : 800-29576-05

Top Assembly Serial Number           : FTX161683HL

Top Revision Number                  : B0

Product/Model Number                 : AP801AGN-A-K9

Configuration register is 0xF

6 Replies 6

Leo Laohoo
Hall of Fame
Hall of Fame
Radio dot11 0 is reporting its a b radio.  When it is actually an n 2.4 radio.

Dot11Radio0 is 2.4 Ghz.  As to the "n", it's not.  You can only enable 802.11n on the 5.0 Ghz.

I have tried updating the firmware to the latest

You're not running the "latest" firmware.  JA has a dot1q trunk bug and has been fixed in JB.

Post the config of your AP.

Here is the dot11 radio from a working 891w, must be where my confusion is coming from.

Dot11Radio0 is up, line protocol is up

  Hardware is 802.11N 2.4GHz Radio

I will update to JB see if it makes a difference.

Brian Rapier
Level 1
Level 1

Firmware update did nothing to resolve the issue.  Only solution so far that has worked was removing the power from the router completely and plugging it back in. 

This seems to have resolved the issue for now.  I will monitor the issue to see if it pops up again.

I've got some 890W and I've never seen something like this.

Me either, I have 9 others running without issue.  This one just decided to start acting up. 

I will just have to monitor it to see if it comes back. 

I am thinking it was either a power blip (which should not happen as its on a UPS) or one of the users at the location repeatedly unplugged it to fix some issue they thought it would solve.

Just RMA it. 

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