Troubleshooting Mpls Configuration - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide

36.6 Troubleshooting MPLS Configuration

Symptom: Session cannot be setup with the peer after LDP is enabled on the interface.
Troubleshooting:
Cause 1: Loop detection configuration is different at the two ends.
Solution: Check loop detection configuration at both ends to see if one end is
configured while the other end is not (this will result in session negotiation failure).
Cause 2: Local machine cannot get the route to peer LSR ID, so TCP connection
cannot be set up and session cannot be established.
Solution: The default address for session transfer is MPLS LSR ID. The local machine
should issue the LSR ID route (often the loopback address) and lean the peer LSR ID
route.
Chapter 36 MPLS Basic Capability Configuration
36-15