From: Tim Fletcher (tim@fletchmail.net)
Date: Fri Feb 21 2003 - 17:14:29 GMT-3
Be aware that this will not match if there is a single space between 123
and 456 (123 and 456 are neighbors). Try:
ip as-path access-list 1 _123_(.*_)?456_
ip as-path access-list 2 _456_(.*_)?123_
Or you could consolidate it into 1 acl:
ip as-path access-list 1 _123_(.*_)?456_| _456_(.*_)?123_
-Tim Fletcher
At 11:39 AM 2/21/2003 -0400, Joe Chang wrote:
>Cezar is on the right track though. This should be closer:
>
> IP as-path access-list 1 _123_.*_456_
> IP as-path access-list 2 _456_.*_123_
>
>
>----- Original Message -----
>From: "Ram Shummoogum" <rshummoo@ca.ibm.com>
>To: <csmith@plannetconsulting.com>
>Cc: <ccielab@groupstudy.com>
>Sent: Friday, February 21, 2003 10:41 AM
>Subject: RE: AS PATH AND
>
>
> > I have tried what you suggested and it does not work.
> > It is behaving like a OR.
> > I change 456 to a non-existent one and it still passes the filter.
> >
> > Cheers,
> > RAM
> >
> > "Cassidy D. Smith" <csmith@plannetconsulting.com>@groupstudy.com on
> > 02/21/2003 04:31:32 AM
> >
> > Please respond to "Cassidy D. Smith" <csmith@plannetconsulting.com>
> >
> > Sent by: nobody@groupstudy.com
> >
> >
> > To: "'Cezar Fistik'" <cfistik@moldovacc.md>, <ccielab@groupstudy.com>
> > cc:
> > Subject: RE: AS PATH AND
> >
> >
> > The problem is that they are in different order, so a single as-path acl
> > won't work. Have you tried doing multiple matches in a route-map ? In
>other
> > words you create to as-path acl's and then match on both, this should
> > create
> > your "and". If you try this please let us know if it works..
> >
> > -------example---------------------------
> >
> > IP as-path access-list 1 _123_
> > IP as-path access-list 2 _456_
> >
> > Route-Map 1-AND-2 permit 10
> > match as-path 1 2
> >
> > Route-Map 1-AND-2 deny 20
> >
> > --------end example--------------------
> >
> >
> > Cassidy
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Cezar
> > Fistik
> > Sent: Thursday, February 20, 2003 10:24 PM
> > To: ccielab@groupstudy.com
> > Subject: Re:
> >
> >
> > Hi,
> >
> > I don't know if there si an "and" in regular expressions, never heard of
> > it. In order to match AS123 AND AS456 you can try using the following
> > expressoin:
> >
> > 123.*456
> >
> > Regards,
> > Cezar Fistik
> >
> > ----- Original Message -----
> > From: "Ram Shummoogum" <rshummoo@ca.ibm.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Thursday, February 20, 2003 10:34 PM
> >
> >
> > > Hi ALL:
> > >
> > >
> > > I need some help on this BGP regular expression.
> > >
> > >
> > > Make a router only accept routes that has transit AS 123 and AS 456.
>The
> > > keyword here is "and" and not or.
> > >
> > >
> > > Ex: {34 5 6 456 7 99 123 88}
> > > {45 123 89 456 7}
> > >
> > >
> > >
> > >
> > >
> > > I know "OR" is | but what is AND.
> > >
> > >
> > >
> > >
> > >
> > > Thanks for your help
> > >
> > >
> > > RAM
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:28 GMT-3