From: Ben (bmunyao@gmail.com)
Date: Thu Sep 13 2007 - 04:58:00 ART
Your regex would also work for incoming on RouterB.
Sincerely
Ben
On 9/13/07, 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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