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

[David Freedman]

control plane overloaded by traffic? are you doing control plane policing?

Mark Tech wrote:
> 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
> 
> 
>       
> 
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