North American Network Operators Group

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Re: Cisco Route filtering [was Re: OPS: BGP spew from ASN 7374]

  • From: Mike Hughes
  • Date: Tue Apr 13 07:57:54 1999

On 8 Apr 99, at 4:14, alex@tempest.nac.net wrote:

> Would the same be true with a prefix-length filter, which I assume the
> syntax would be:
> 
> ip prefix-list 1 permit 209.123.0.0/16 
> neigh 2.3.4.5 prefix-list 1 in

With the prefix list it would have to be an exact match using the 
above. To accept more specifics within that block, you would do 
something like...

ip prefix-list 1 permit 209.123.0.0/16 ge 16
neigh 2.3.4.5 prefix-list 1 in

Mike
-- 
Mike Hughes - Network Services      mike@dircon.net
Tel: +44 181 297 0300               http://www.dircon.net/
Fax: +44 181 463 9820
"We don't see things as they are, we see things as we are"