[c-nsp] MPLS IP command on tunnel interface - PE to PE tunnel

[Eric]

Alaerte,

I had opened a case on this (as I didn't read the same docs you did ;))
and was said it was related to cef recirculation on some platforms. It
was required on my 2800, but e.g. not on a 7600. For IP VPN traffic to
work on an MPLS tunnel between a 2800 and  7600 I had to enable mpls ip
on the 2800 tunnel interface and allow targetted hello's on the 7600.

Cheers!

Eric
Alaerte.Vidali at nokia.com wrote:
> Tks Crowe,
> 
> Yes, I agree. Do you have any clue way some implementations use it? (or
> just wrong configuration)
> 
> Using it cause IOS to send LDP hellos to remote routers. And establish
> LDP session without need. Any comments? 
> 
> Br,
> Alaerte 
> 
> -----Original Message-----
> From: ext Robert Crowe [mailto:rwcrowe at nc.rr.com] 
> Sent: Thursday, March 15, 2007 1:52 PM
> To: Vidali Alaerte (Nokia-NET/RioDeJaneiro); cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] MPLS IP command on tunnel interface - PE to PE
> tunnel
> 
> Not needed on PE to PE
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Alaerte.Vidali at nokia.com
> Sent: Thursday, March 15, 2007 12:36 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] MPLS IP command on tunnel interface - PE to PE tunnel
> 
> Do you see any reason to enable LDP on tunnel interface when configuring
> MPLS TE between PE routers?
> (configure "mpls ip" under tunnel mode)
> 
> Doing research I found this:
> 
> "TE Tunnels Between P Routers
> The configuration of a TE tunnel to support MPLS VPN traffic between P
> routers is much the same as that for a tunnel between PE routers but
> with one key difference on the head-end router: enabling LDP (or TDP) on
> the tunnel interface."
> 
> But sometimes I saw configurations of MPLS TE between PE routers using
> "mpls ip" under the tunnel.
> 
> Tks,
> Alaerte
> 
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