MPLS LDP Router ID

Hello All,

I'm hoping someone can clear up my lack of understanding on MPLS LDP router
ID subnetting.

If your LDP router ID is a loopback address that is other than a /32 and you
have the interface set to a point to point type OSPF interface, you see the
"no host route" in the show output:

R6#sh mpls ldp discovery
 Local LDP Identifier:
    6.6.6.6:0
    Discovery Sources:
    Interfaces:
        Serial1/1 (ldp): xmit/recv
            LDP Id: 3.3.3.3:0; *no host route
*
Does the "no host route" even matter though? I have a dynamips lab that has
that scenario and everything appears to be functioning fine. The CEs can
ping each other across the VPN.

If I take off the "ip ospf network point-to-point" from the loopback
interface then I get the following error message:

**Mar 1 01:23:58.131: %BGP-4-VPNV4NH_MASK: Nexthop 6.6.6.6 may not be
reachable from neigbor 3.3.3.3 - not /32 mask
*
Then the VPN no longer works. I see the routes on the CEs but traceroutes
die at the directly connected PE.

Is this the expected behavior and is there a workaround? Also, is there a
"debug ip packet" type command that is vrf specific?

Thanks,
Matt

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Received on Mon Apr 25 2011 - 15:12:28 ART