Troubleshooting Mpls Configuration - 3Com 8807 Configuration Manual

526 C 48: MPLS B
HAPTER
Troubleshooting MPLS
Configuration
C C
ASIC APABILITY ONFIGURATION
# Configure IP address and enable LDP and MPLS for VLAN interface 202.
[SW8800] vlan 202
[3Com-vlan202] port gigabitethernet 2/1/1
[3Com-vlan202] quit
[SW8800] interface Vlan-interface 202
[3Com-Vlan-interface202] ip address 100.10.1.1 255.255.255.0
[3Com-Vlan-interface202] mpls
[3Com-Vlan-interface202] mpls ldp enable
[3Com-Vlan-interface202] quit
# Enable OSPF on the interface connecting Switch C with Switch B.
[SW8800] Router id 100.10.1.1
[SW8800] ospf
[3Com-ospf-1] area 0
[3Com-ospf-1-area-0.0.0.0] network 100.10.1.0 0.0.0.255
4 Configure Switch D
# Configure LSR ID and enable MPLS and LDP.
[SW8800] mpls lsr-id 172.17.1.2
[SW8800] mpls
[3Com-mpls] quit
[SW8800] mpls ldp
# Configure IP address and enable MPLS and LDP for VLAN interface 203.
[SW8800] vlan 203
[3Com-vlan203] port gigabitethernet 2/1/3
[3Com-vlan203] quit
[SW8800] interface vlan-interface 203
[3Com-Vlan-interface203] ip address 172.17.1.2 255.255.0.0
[3Com-Vlan-interface203] mpls
[3Com-Vlan-interface203] mpls ldp enable
# Enable OSPF on the interface connecting Switch D with Switch B.
[SW8800] Router id 172.17.1.2
[SW8800] ospf
[3Com-ospf-1] area 0
[3Com-ospf-1-area-0.0.0.0] network 172.17.0.0 0.0.255.255
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.