[nsp] Cat3750G, IP ACL filtering

jlewis at lewis.org jlewis at lewis.org
Sat Mar 6 16:55:56 EST 2004


On Sat, 6 Mar 2004 sthaug at nethelp.no wrote:

> The experience from 3550 is that ACL counters do *not* work. You need
> to check the actual traffic (with a sniffer, a software router where
> counters *do* work, or similar) to see if the ACL is blocking what you
> want it to block.

Argh...I ran into this just a few days ago.  I tried numbered and named IP
extended ACLs on a 3550 [port running in no switchport mode], and the
counters would occasionally increment a little...but I knew there was way
more traffic going through the port than the ACL suggested.  I was going
to post to ask if it was known bug.

----------------------------------------------------------------------
 Jon Lewis *jlewis at lewis.org*|  I route
 Senior Network Engineer     |  therefore you are
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