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Community Member

12.3(8)JA2 on AP1230G: sometimes stops passing broadcast frames to wireless

Several months after upgrading our AP1230G units to IOS 12.3(8)JA2,

we learned that they were intermittently failing to forward

broadcast (and multicast) frames from the wired to the wireless side.

The wireless customer typically notices it once wired devices (including

the IP router) can no longer get broadcast IP ARP requests to reach the

wireless client. As you can imagine, this causes widespread problems for

our wireless clients.

This is filed as bug ID CSCsg26708.

Previously we'd been running 12.3(7)JA1, 12.3(7)JA2, and 12.3(7)JA3,

where we didn't experience this problem. Re-testing the identical

configuration in 12.3(7)JA3 appears to show that the issue wasn't

present in 12.3(7)JA3.

I don't see any apparent pattern to when the APs get into this state,

or when they come out of this state. The problem duration can range from seconds

to minutes to hours at a time. There's no periodicity that's apparent to me.

There's no apparent synchronization among the hundreds of APs experiencing the

problem (all are attached to the same Ethernet VLAN/IP network); each AP

experiences the problem independantly of the other APs.

I've not been able to determine what triggers the AP to get into (or out

of) this state; for example, logs don't indicate it happens when a client

associates or disassociates. So although it's happening many times

per day on many APs, I don't know how to reliably trigger it.

If anyone else is experiencing this issue,

I'd love to hear if you've been able to determine what triggers it.

Knowing how to reliably reproduce it might be useful information I could

provide to cisco for the bug report.

1 REPLY
Community Member

Re: 12.3(8)JA2 on AP1230G: sometimes stops passing broadcast fra

I should also mention that we operated with 12.3(8)JA2 for several months with no complaints from customers. The complaints began (leading us to learn about the broadcast frame loss) only when the school year resumed, and our student population returned.

So it's possible that these are related...e.g. the appearance of some newer wireless client hardware/firmware/drivers is triggering in the bug in the AP.

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