From: Josef A (josefnet@gmail.com)
Date: Fri Dec 02 2005 - 12:25:11 GMT-3
Thanks Wayne, In answer to your questions:
R3 is learning the same networks from BB3 as R6 is learning from BB1.
R5 is a route-reflector.
I am actually using IEWB, but this is a personally modified scenario. Using
it to learn BGP next-hop modification. The doc cd actually says that a
route-map can be used inbound on R3 to set the next-hop for those routes to
BB3. I have tried this, but its not working.
Here is the link on the doc cd:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_
c/ipcprt2/1cfbgp.htm#wp1001680
Thanks
Josef
On 12/1/05, CCIE KH49279 <ccie_lab@inetiq.com > wrote:
>
> Josef,
>
> I am trying to understand your requirements here.
>
> Is R3 learning the same networks from BB3 that R6 is learning from BB1?
>
> I understand that you are setting local_pref on R6 and sending this into
> your BGP domain. Is your BGP domain fully-meshed or is there a
> route-reflector setup?
>
> What workbook (if any) are you working from?
>
> Wayne
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On Behalf Of
> Josef A
> Sent: Thursday, December 01, 2005 7:32 AM
> To: Group Study
> Subject: Re: A bgp question
>
> 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.
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Mon Jan 09 2006 - 07:07:50 GMT-3