From: Josef A (josefnet@gmail.com)
Date: Thu Dec 01 2005 - 10:31:49 GMT-3
Please note that I have deliberately set the local preference on R6 in order
to make R3 prefer the exit via R6. Now I want to override that without using
weight or local preference. AS54 could also have prepended towards R3 to
create the same problem.
How can I make R3 prefer BB3 instead of BB1.
Thanks again.
On 12/1/05, Josef A <josefnet@gmail.com> wrote:
>
> Thanks guys for looking into this.
>
> I probably was not very clear on the restrictions:
>
> I want to force R3 to use BB3 as the next-hop for those AS 54 routes it is
> learning from BB1 via ibgp. I do not want to use weight or local
preference,
> and would still like to use the ibgp routes via R5 should the link to BB3
> fails.
>
> TIA
> Josef
>
>
> On 11/30/05, Josef A <josefnet@gmail.com> wrote:
> >
> > Hello Guys:
> >
> > Here is a question on bgp next-hop modification.
> >
> > I have a topology like this:
> >
> >
> > BB3 ------------------ R3
> > |
> > |
> > R5
> > |
> > |
> > BB1------------------- R6
> >
> >
> > BB1 and BB3 are both in AS54.
> >
> > R3, R5, and R6 are in AS 100.
> >
> > AS 100 is learning some prefixes from AS54. I have initially set the
> > local preference inbound on R6 so that AS100 will prefer the R6-BB1 link
to
> > reach those prefixes from AS54.
> >
> > Thus R3 is now using BB1 as its next-hop for those prefixes.
> >
> > My goal now is to override that behavior on R3, and force R3 to make BB3
> > the next-hop for those prefixes, without using WEIGHT. I have tried using
a
> > route-map inbound on R3 matching those prefixes and using the set ip
> > next-hop A.B.C.D or the set ip next-hop peer-address command . But this
> > is not working.
> >
> > What am I missing?
> >
> > Your thoughts and/or comments is appreciated
> >
> > Josef.
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