Hi Matt,
LDP and OSPF are not related to each other.
LDP sends labels for every route in the routing table, and in our case, for
R6 the connected route fo Lo0 is /24.
By default OSPF will send all Loopback routes as /32.
To populate the LFIB, R2 will try to match every route in it routing table
with LDP advertisement. In our case, R2 have a /32 route for R6's Lo0 but R6
is sending /24 LDP advertisement. So now, L2 do not know what label to push
when sending packets to R6's Lo0.
The solution is to configure OSPF on R6 to send the original mask for Lo0
using the OSPF p2p network command.
HTH,
Dan #13685 (RS/Sec/SP)
The CCIE troubleshooting blog: http://dans-net.com
Blogs and organic groups at http://www.ccie.net
Received on Sat Jan 01 2011 - 22:10:13 ART
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