Ignoring too-frequent accounting packets from buggy NAS

Phil Mayers p.mayers at imperial.ac.uk
Fri Oct 26 14:53:04 CEST 2012


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 

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?


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