[c-nsp] GSR no ldp all of a sudden

[Mark Tech]

Hi
I have a couple of GSR's and 7600'2 running ldp in an an MPLS test environment. All of a sudden 1 GSR has lost all its LDP neighours. I have cleared the mpls ldp neighours, and finally ended up rebooting the router with no success

Here is an brief output of some ldp commands:


---------here the LDP suddenly dropped--------
Nov  6 14:44:45 GMT: %SYS-5-CONFIG_I: Configured from console by vty0 (5.14.64.1)
Nov  6 14:47:05 GMT: %LDP-5-GR: GR session 5.14.95.243:0 (inst. 3): interrupted--recovery pending
Nov  6 14:47:05 GMT: %LDP-5-NBRCHG: LDP Neighbor 5.14.95.243:0 (0) is DOWN (Session KeepAlive Timer expired)
Nov  6 14:47:28 GMT: %LDP-5-GR: GR session 5.14.95.245:0 (inst. 2): interrupted--recovery pending
Nov  6 14:47:28 GMT: %LDP-5-NBRCHG: LDP Neighbor 5.14.95.245:0 (0) is DOWN (Session KeepAlive Timer expired)
Nov  6 14:47:37 GMT: %LDP-5-GR: GR session 5.14.95.244:0 (inst. 1): interrupted--recovery pending

rt-lon-12#sh mpls ldp neighbor

rt-lon-12#sh mpls ldp discovery
 Local LDP Identifier:
    5.14.95.246:0
    Discovery Sources:
    Interfaces:
        Port-channel1 (ldp): xmit/recv
            LDP Id: 5.14.95.243:0
        Port-channel2 (ldp): xmit/recv
            LDP Id: 5.14.95.244:0
        Port-channel3 (ldp): xmit/recv
            LDP Id: 5.14.95.245:0

rt-lon-12#sh mpls interfaces
Interface              IP            Tunnel   Operational
GigabitEthernet0/0/0   Yes           No       Yes
GigabitEthernet0/0/1   Yes           No       Yes
GigabitEthernet0/0/2   Yes           No       Yes
GigabitEthernet0/0/3   Yes           No       Yes
GigabitEthernet0/0/4   Yes           No       Yes
GigabitEthernet0/0/5   Yes           No       Yes
Port-channel1          Yes (ldp)     No       Yes
Port-channel2          Yes (ldp)     No       Yes
Port-channel3          Yes (ldp)     No       Yes

Anyone have any ideas? This has been working for over a month now and all other routers are up and using LDP successfully. In fact the other GSR this is connected to is a carbon-copy, bar IP addresses

Regards

Mark