Ignoring too-frequent accounting packets from buggy NAS

[Phil Mayers]

All,

We are having a problem with our Cisco lightweight wireless since a 
recent firmware upgrade. I am delving into it, and will probably open a 
TAC case, but in the meantime I need a solution.

The specific issue is that the NAS is sending interim accounting very, 
very frequently, in violation of the spec, its own config, and the 
Acct-Interim-Interval.

My suspicion is that the device is sending an accounting update whenever 
some internal "update" occurs (e.g. migrate to a new AP) and that this 
is an unintended side effect of some internal changes.

This is killing our SQL database :o(

Until I can get this fixed, can anyone think of an easy way to throw 
away interim accounting requests for a given "key" and time window? I'm 
wondering if rlm_cache can be made to do it?

Cheers,
Phil