[c-nsp] Cisco 10K MPLS VPN

[Oliver Boehmer (oboehmer)]

Hi,

I've never ran any form of MPLS without LDP on the interface, but if
you're using RSVP-TE, LDP on the physical interfaces should not be
needed. Can you show your working and your not-working config?

The decision which path (LDP or RSVP-TE signalled path) is taken by the
headend depends on the routing and tunnel setup. So if you just use
autoroute on the tunnel, we'll send all traffic towards the BGP
next-hops over the tunnel. If the BGP next-hop (for MPLS-VPN) is equal
to the MPLS-TE router-ID of the tail (i.e. if this is a PE-PE tunnel),
there is no need to enable LDP on the tunnel itself. Otherwise LDP needs
to run over the tunnel (i.e. enable "mpls ip" on the TE tunnel
interface).

Not sure if this answers your question, though :-)

	oli

FAHAD ALI KHAN <> wrote on Monday, March 17, 2008 8:55 AM:

> Guys
> Im stuck in configuring MPLS L3VPN in Cisco + juniper in my test lab
> environment.
> 
> I have Cisco 10K as PE connected to DSL IPoA client, Cisco 7206VXR as
> another PE connected with other IPoA client. MPLS P routers are of
> Juniper (J4300).
> for MPLS L3VPN there is no need to run LDP on core facing interfaces
> if we r using RSVP as TE LSP. i have configured every thing right
> (a/c to me)....and check that vpn-v4 routes are shared b/w both PEs.
> Tunnels are also UP. but traffic is carrying though MPLS...core.
> 
> As i enable LDP on juniper core facing interfaces, as it is enabled by
> default on Cisco routers.....traffic flow start.
> 
> This is amazed me. Kindly suggest me about this scenario. any sample
> configuration is welcome.
> 
> Also, one more thing i check while enabling LDP & RSVP both, i have
> received routes from LDP paths not RSVP...and VPN routes are avaiable
> though LDP path...means...there is no traffic engineering. is there
> any way to check the route-prefernce of LDP and RSVP on Cisco....as
> it is 7 for RSVP & 9 for LDP on Juniper.
> 
> Is there any way that LDP is got tunneled over RSVP?
> 
> 
> Regards
> 
> Fahad
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/