From: Tim Fletcher (tim@fletchmail.net)
Date: Fri Dec 20 2002 - 12:56:16 GMT-3
Or
route-map foo deny 10
match as-path 1
route-map foo permit 20
ip as-path access-list 1 permit _3_
Just another approach.
-Tim Fletcher
At 01:29 PM 12/20/2002 +0000, chrisa wrote:
>Depends what you are trying to do.
>
>Here is a example.
>
> neighbor x.x.x.x route-map foo in
>
>route-map foo permit 10
> match as-path 1
>
>ip as-path access-list 1 deny _3_
>ip as-path access-list 1 permit .*
>
>This would deny anything with a AS 3 in the AS path and permits all others.
>
>
>Another
>
> neighbor x.x.x.x route-map foo in
>
>route-map foo permit 1
> match as-path 1
>
>
>ip as-path access-list 1 permit ^50$
>ip as-path access-list 1 deny .*
>
>
>This would only allow AS 50.
>
>Suggest play with in a lab very powerful tool but needs practice good
>examples on routing TCP II and appendix B has a good tutorial.
>
>
>
>
>
>
>
>----- Original Message -----
>From: "Sage Vadi" <sagevadi@yahoo.co.uk>
>To: <ccielab@groupstudy.com>
>Sent: Friday, December 20, 2002 12:21 PM
>Subject: IP AS-PATH ACL & Regular Expressions
>
>
> > Hi all!
> >
> > Currently I have -
> >
> > ip as-path access-list 1 permit _3_
> > ~
> > route-map foo permit 10
> > match as-path 1
> > ~
> > neighbor x.x.x.x route-map foo in
> >
> > Which does what it is meant to do - ensure that the AS
> > path has got a 3 in it's list.
> >
> > Q) How do I do the OPPOSITE - DENY any routes that
> > have a 3 in the AS-PATH ???
> >
> > Can you show me how to set the route-map (deny or
> > permit) and how to set the as-path acl (deny or
> > permit). I've tried various permutations with little
> > success.
> >
> >
> >
> > __________________________________________________
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>.
.
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