From: Rich Collins (nilsi2002@gmail.com)
Date: Wed Sep 12 2007 - 19:28:35 ART
That looks good to me or you could be more specific and use the AS 200 that
you had in your first email. It might help with clarity when looking at the
configuration.
ip as-path access-list 1permit ^200+(_[0-9]+)?$
On 9/12/07, Carlos Trujillo Jimenez <nergal888@hotmail.com> wrote:
>
>
> what about this option applied inbound in routerB as a route-map or a
> filter-list but applied inbound.
>
> ip as-path access-list 1permit ^[0-9]+(_[0-9]+)?$
>
> Is this ok??
>
>
>
>
> >From: "Rich Collins" <nilsi2002@gmail.com>
> >Reply-To: "Rich Collins" <nilsi2002@gmail.com>
> >To: "Cisco certification" <ccielab@groupstudy.com>
> >Subject: Fwd: bgp reg-exp for directly connected costumers
> >Date: Wed, 12 Sep 2007 16:34:45 -0400
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> >
> >For action 1 what about ?:
> >
> >ip as-path access-list 1 permit ^[0-9]*$ (This covers routes generated
> >from
> >directly connected AS's and also locally generated prefixes.
> >
> >neighbor B.B.B.B filter-list 1 out
> >
> >Rich
> >
> >On 9/12/07, Carlos Trujillo Jimenez <nergal888@hotmail.com> wrote:
> > >
> > > Hi all.
> > >
> > > Im quite confused, please if someone helps me clarify, in the
> following
> > > scenario think both solutions will work.
> > >
> > > Scenario:
> > >
> > >
>
>
>(AS500)ROUTERX---------------------(AS200)ROUTERA---------------------------
----ROUTERB(AS300)
> > >
> > >
> > > ROUTERA is forming an EBGP peering relationship ith both ROUTERB and
> > > ROUTERX.
> > >
> > > Action1. (configuration only in ROUTERA)
> > > I want to RouterA send only its locally originated prefixes, as well
> as
> > > prefixes ORIGINATED from his directly connected cosumters to router B.
> > >
> > > ROUTERA:
> > >
> > > ip as-path access-list 1 permit ^200_[0-9]*$
> > >
> > > route-map ONLY-AS200-ANDCOSTUMERS
> > > match as-path 1
> > >
> > > router bgp 200
> > > neighbor ROUTERB route-map ONLY-AS200-COSTUMERS out
> > >
> > >
> > > Action2.(configuration only in ROUTERB)
> > > I want the same purpose as action 1 but only configuring it at
> ROUTERB,
> > > mean
> > > only recibe prefixes originates by its neighbor routerA as 200, and
> its
> > > directly connected costumers
> > >
> > > ROUTERB:
> > > ip as-path access-list 1 permit ^200_[0-9]*$
> > >
> > > route-map ONLY-AS200-ANDCOSTUMERS
> > > match as-path 1
> > >
> > > router bgp 300
> > > neighbor ROUTERA route-map ONLY-AS200-COSTUMERS in
> > >
> > > The as-path access-list is the same in both actions, but with the
> route
> > > map
> > > apliedd in the first outbound, and in the second inbound, summarizing
> in
> > > the
> > > sender applied outbound and in the receiber applied inbound.
> > >
> > > Please correct me if Im wrong with this one.
> > >
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