[c-nsp] Routing Question

[Joseph Hardeman]

Hi Gert,

Thanks for the reply, I was hoping there was some way to do it with
Local-Prefs or weights setting the BGP routes from peers into a group and
then selecting that group from the routing table for the internal IP Range I
want to use those routes.  I presume there is a way to setup VRFs to do
this?  Or how would that work?  I believe VRFs are specific for an MPLS
network and I have never touched or set one of those up before.

Thanks

Joe

On Thu, Jun 2, 2011 at 2:02 PM, Gert Doering <gert at greenie.muc.de> wrote:

> Hi,
>
> On Thu, Jun 02, 2011 at 08:14:32AM -0400, Joseph Hardeman wrote:
> > I am wondering, is it possible to route traffic based on the Source IP to
> > specific BGP learned routes?  For instance, if I have IP Range
> > 2.2.2.2/24that I want only to use routes learned from peerings with
> > say AS 444, 555,
> > 666.  But I want to have IP Range 2.2.2.3/24 use the routes learned from
> > peerings with say AS 111, 222, 333.  I know I can do PBR and set the
> > next-hop based on the source IP but it appears that even with multiple
> > entries in that route-map statement it will choose one out of the list
> and
> > use that by default and not choose the best path learned from the
> neighbors
> > I want it too.  Can this be done with local-prefs or weights?
>
> No.
>
> You'd need to do VRFs (and having a full table in multiple VRFs is going
> to eat lots of memory).
>
> gert
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> gert at net.informatik.tu-muenchen.de
>