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Re: ACL question posted 09/07/2004
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You could use a prefix list unless, for example, the lab said you couldn't. That's exactly what prefix-lists were designed for.

HTH, Tim
----- Original Message ----- From: "Jonathan R. Charles" <jrcdehc@xxxxxxxxxxxxx>
To: <ccielab@xxxxxxxxxxxxxx>
Sent: Monday, September 06, 2004 9:02 PM
Subject: RE: ACL question



This is going to sound pretty dumb, but why wouldn't you just use a prefix
list?


Jonathan


-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of Phil
Sent: Monday, September 06, 2004 11:00
To: Jonathan R. Charles
Cc: ccielab@xxxxxxxxxxxxxx
Subject: Re: ACL question


Jonathan,

That's how the access-list behaves in the command
"neighbor x.x.x.x distribute-list 101 out" under router bgp.

Check this document:
http://www.cisco.com/en/US/tech/tk365/tk80/technologies_tech_note09186a00801
310cb.shtml

Phil


On Mon, 6 Sep 2004 09:34:33 -0500, Jonathan R. Charles <jrcdehc@xxxxxxxxxxxxx> wrote:
In BGP Case Studies, the following paragraph

The command "access-list 1 permit 160.0.0.0 0.255.255.255" permits
160.0.0.0/8, 160.0.0.0/9, 160.0.0.0/10 and so on. In order to restrict the
update to only 160.0.0.0/8, we have to use an extended access-list of the
following format: "access-list 101 permit ip 160.0.0.0 0.255.255.255
255.0.0.0 0.0.0.0" This list permits 160.0.0.0/8 only.


I must be missing something here, because I don't see how the destination
of
255.0.0.0 with a mask of 0.0.0.0 would permit all the other 160.0.0.0
networks that had a mask different from 8.

Jonathan Charles

SBC

CCNP/CCDP, NNCSE, NNCSS, MCSE

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