[cisco-nas] CPU usage : PRI vs CAS

[Pierre Nepveu]

hello all,

anybody has any thought on how to reduce CPU usage on AS5200's ?  The problem
arises when a client infected with worms such as Nachi gets online. They end up
crashing the NAS because they generate so many small packets that keep the cpu
busy. The NAS cannot keep it's connection to the telco switch (or the isdn
process crashes, or whatever). Anyway, the NAS becomes useless and need to be
rebooted.

Any thoughts on how to circumvent the problem ?

Would using CAS instead of PRI/ISDN aleviate the problem (the ISDN process
wouldn't crash, for one thing) ?

Would using CAS make V.90 unusable (if I rebember correctly, K56 was ok) ?

Thanks !

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