Ethernet interface input queue 81/80 (size/max)

Question

Hello,
Does anyone had the problem that the Gigabit interface of a C1140-K9W7 (or C1135)
sometimes "hangs" due to queue problems (from what I understood it was queue problems)?
I've got this AP, C1140-K9W7 with IOS 12.4(21a)JA1 and noticed it was not processing
any input packets at the Gigabit interface, the drop count was 0 but strangely the input queue
information was that it had size 81 and max 80... looks to me that the queue processing
code hanged somewhere...
The interface output is OK however (the AP is sending arp requests..) .
I've done some search but was not able to find any information about it, also followed the
steps in [1] to try troubleshoot what was causing that, no success. The IP traffic listing
shows that the interface is receiving packets but they aren't being processed and "aren't"
droped also (at least the drop count is 0).
If I reboot the AP it does work OK yes... I can still access the console (via serial) and it
still is at that state in case there's any suggestion of procedure.
Thanks for your time.
Jean Mousinho
[1] http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094791.shtml

Answer 1

It looks like this could be related:
CSCtf27580 Ethernet interface input queue wedge from broadcast/uniGRE traffic
Is there any GRE traffic going through this AP?
The workarounds are:
Reboot APs to bring APs back up for time being.
OR
go back to 6.0.188.0 code on WLC.
OR
Route GRE traffic away from AP's.
It appears that it definitely exists in your code:
12.4(21a)JHA          12.4(21a)JA01          006.000(196.000)