[c-nsp] Cisco 10K MPLS VPN

[Oliver Boehmer (oboehmer)]

FAHAD ALI KHAN <mailto:fahad.alikhan at gmail.com> wrote on Thursday, March
20, 2008 6:04 AM:

> Oli
> 
> autoroute announce will send all the traffic (IGP + VPN) towards
> tunnel, where as i dont want to send IGP traffic but only VPN
> traffic.  
> 
> Is there any way.....well u say static...managment of static will b a
> great hurdle in routing of 1000s of VPNs routes... 
> 
> Is there any solution, to this issue. As Juniper by default select
> RSVP tunnel as the next-hop if BGP next-hop is also the same for the
> VPN route and it seems to be pretty simple & straight forward.  
> 
> All the suggestions will be welcome.

Fahad,

the only option you have is to use a different BGP next-hop for your
VPNv4 route (either via "bgp next-hop Loopback1" in the "ip vrf"
definition in newer releases), or using a route-map, and point a static
route to this next-hop over the tunnel. This way, all VRFs configured
this way will be sent over the tunnel, all other traffic will be sent
via regular IGP shortest path. You need to run LDP over the tunnel for
this to work so the headend will see the imp-null LDP for this next-hop.

	oli