Re: MPBGP ip vrf name

Many Thanks for the explanation Brian, So as long as what ever I am
exporting on one site connecting PE, I should import on the other sites
connecting PEs and vice versa it should work. Vrf name and RD values could
be different however i should keep RT values unique per customer perfix
other wise routes could leak into other customers vrfs.
Regards

Regards
On 27 December 2012 00:18, Brian Dennis <bdennis_at_ine.com> wrote:

> The VRF name does not matter as it's not exchanged between PE's. Also the
> RD's do not need to be "reciprocal".
>
> From RFC 4364 - BGP/MPLS IP Virtual Private Networks (VPNs)
>
> An RD is simply a number, and it does not contain any inherent
> information; it does not identify the origin of the route or the set
> of VPNs to which the route is to be distributed. The purpose of the
> RD is solely to allow one to create distinct routes to a common IPv4
> address prefix.
>
>
> A Route Target attribute can be thought of as identifying a set of
> sites. (Though it would be more precise to think of it as
> identifying a set of VRFs.) Associating a particular Route Target
> attribute with a route allows that route to be placed in the VRFs
> that are used for routing traffic that is received from the
> corresponding sites.
>
>
> http://www.ietf.org/rfc/rfc4364.txt
>
>
> So remember that RD has nothing to do with RT and RT likewise has nothing
> to do with RD. They serve two different purposes as stated above.
>
> The configuration below will do the same as your configuration in regards
> to the two sites.
>
> Router-Manchester_pop
> ip vrf CUST_100
> rd 100:100
> route-target export 11:11
> route-target import 22:22
>
> ++++++++++++++++++++++++++++++++++++++
> Router-Birmingham_pop
> ip vrf CUST_200
> rd 200:200
> route-target export 22:22
> route-target import 11:11
>
> HTH,
>
>
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
> bdennis_at_ine.com
>
> INE, Inc.
> http://www.INE.com
>
>
>
>
> On 12/26/12 7:50 PM, "Tauseef Khan" <tasneemjan_at_googlemail.com> wrote:
>
> >Would it matter if i have different vrf names on PE routers routers as
> >long
> >as I have reciprocal rd values.
> >
> >so on one PE router connecting customer site i have
> >
> >Router-Manchester_pop
> >ip vrf CUST_100
> > rd 20:20
> > route-target export 20:20
> > route-target import 20:20
> > route-target import 10:10
> >
> >++++++++++++++++++++++++++++++++++++++
> >Router-Birmingham_pop
> >ip vrf CUST_200
> > rd 10:10
> > route-target export 10:10
> > route-target import 10:10
> > route-target import 20:20
> > ip vrf forwarding site-a
> >
> >
> >both vrf CUST_100 and CUST_200 belong to the same Customer
> >
> >in the mpbgp table when i do which sounds strange as rd vlaues are
> >different on bot PEs (20:20 and 10:10)
> >show ip bgp vpnv4 all i can see the routes populated. appreciate if some
> >one could clarify.
> >regards
> >
> >
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Received on Thu Dec 27 2012 - 11:41:27 ART