Interworking on Static Routing as IGP

[attrgautam]

Was testing interworking between Vlan over ethernet and FR. As long as my LDP was on static routing, I couldnt reach end-to-end. The moment i configured OSPF as my routing protocol it came up. Can anyone let me know what the reason could be ?

[Harold Ritter]

It should work with static routes as well as with dynamic routing protocols.

Make sure that you have connectivity between the loopback addresses of the two PEs and between loopback addresses of each LDP (or TDP) neighbors.

Let me know if I answered your question,

[attrgautam]

The issue was with non recursive routing in my P router. I added non recursive routes and it was fine. Suprised this issue isnt solved even in 12.0(28)s

[Harold Ritter]

Can you elaborate on what you recursive routes were?

Thanks,

[attrgautam]

for my remote loopback, there were static routes in my P router

For eg

Initial Config

ip route x.x.x.x 255.255.255.255 S0/0

Working config

ip route x.x.x.x 255.255.255.255 S0/0 192.168.1.2

[Harold Ritter · Accepted solution]

Gautam,

This is actually normal behavior.

Before the label learnt via an LDP peer is coupled to a route in the FIB, the next-hop IP address of the route needs to match one of the interface IP addresses bound to the LDP peer (see below). So basically it will not work without a next IP address.

r2#sh mpls ldp nei

Peer LDP Ident: 3.3.3.3:0; Local LDP Ident 2.2.2.2:0

TCP connection: 3.3.3.3.11004 - 2.2.2.2.646

State: Oper; Msgs sent/rcvd: 27/27; Downstream

Up time: 00:15:07

LDP discovery sources:

Serial3/0, Src IP addr: 192.168.23.3

Addresses bound to peer LDP Ident:

3.3.3.3 192.168.34.3 192.168.23.3 <++++++ the route next hop has to match one of these addresses.

Hope this helps,