From: Jongsoo.Kim@Intelsat.com
Date: Sat Mar 19 2005 - 16:00:04 GMT-3
Nenad
If you enable cdp,and you the following under your route-map config below.
set ip next-hop ADDRESS1 ADDRESS2
set ip next-hop verify-availability
Your original intended config may work for you.
I found this from another policy-routing but it may work for BGP next-hop.
I am intersted in finding out as well because if this works, this may be
some cool command in BGP world.
Thanks
Jongsoo
-----Original Message-----
From: nenad pudar [mailto:nenad.pudar@gmail.com]
Sent: Saturday, March 19, 2005 11:03 AM
To: asadovnikov
Cc: ccielab@groupstudy.com
Subject: Re: Complex real-life BGP problem
Thanks for this
However in IOS version We have not natch of this is supported .Even if
it was this is mainly PBR based and I do not know will it be possible
to implement this in BGP
nenad
On Fri, 18 Mar 2005 17:20:47 -0500, asadovnikov <asadovnikov@comcast.net>
wrote:
> Nenad,
>
>
http://www.cisco.com/en/US/about/ac123/ac114/ac173/Q2-04/department_techtips
> .html
> You going to have to play with the feature to make sure it does what you
> want.
>
> I have to say that from design perspective I do not necessarily like what
> you are trying to do.
>
> Best Regards,
> Alexei
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> nenad pudar
> Sent: Thursday, March 17, 2005 11:16 AM
> To: ccielab@groupstudy.com
> Subject: Complex real-life BGP problem
>
> Hi
> I want to change the bgp next-hop from being the router receiving some
> routes through EBGP (policy will apply to selcted routes) to be the
> other router in network (many hops away)
> This is for purpose of traffic balancing.
> The problem with this that if the new next-hop-router goes down I will
> be blackholing the selected routes from the router in question.
> So am looking for for some kind of policy that will change next-hop
> only if the new-next-hop router is up.
> Simplified config looks like this
>
> route-map NEXT-HOP PERMIT 10
> match as-path 33------ selected routes
> set ip next-hope NEW ROUTER
>
> route-map NEXT-HOP PERMIT 20
>
> neighbor backbone route-map NEXT-HOP out
>
> The only option I see so far is to use something like this
> set ip next-hop ADDRESS1 ADDRESS2
> Now according to some Cisco documents if ADDRESS1 is unreachible it
> will use ADDRESS2
> BUT IT DOES NOT SEEM TO BE WORKING
> EVEN IF ADDRESS1 GETS UNREACHEBLE all routers continue to have this
> address as next-hop marked with unaccessible.
>
> If anybody already tried to do this or know for some option I will
> appreciate help
> thanks
> nenad
>
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