[j-nsp] LSPs flapping

[Eric Loos]

Hello all,

I am having problems with several LSP's which are flapping every 10-20
minutes, then they stay down for a while, after which they will come
back again.
All these LSP's are crossing one particular router and in the reason for
failing I get there is no route towards the IP listed in the path.
The router also disappears from the ted database.
So MPLS traffic comes in on a sonet interface and goes out to the
termination point of some of the LSP's on a gigethernet port
The LSP's to both this router and the router behind it are failing at
some point.
This router is running 7.3R1.6.
I have debugged RSVP and I get the following results which in my view
are indicating why the routes are no longer present in the ted:
Nov  3 12:13:25 task_send_msg: task RSVP socket 18 length 52 flags
MSG_DONTROUTE(4) to 0.0.0.0 out interface so-1/2/0.0
Nov  3 12:13:32 task_send_msg: task RSVP socket 18 length 52 flags
MSG_DONTROUTE(4) to x.x.x.89 out interface ge-0/3/0.0

Now this seems pretty straightforward, however neither of the interfaces
has any interface flaps, RSVP, LDP, ISIS neighbors/adjacencies are all
up for several weeks too. Nothing else in the logs...
r1-xxxx> show rsvp interface
RSVP interface: 3 active
                  Active Subscr- Static      Available   Reserved
Highwater
Interface   State resv   iption  BW          BW          BW          mark
ge-0/3/0.0  Up         2   100%  700Mbps     700Mbps     0bps        3Mbps
so-1/2/0.0  Up         0   100%  622Mbps     622Mbps     0bps        0bps
t3-1/0/0.0  Up         0   100%  40Mbps      40Mbps      0bps        0bps
r1-xxxx> show rsvp neighbor
RSVP neighbor: 2 learned
Address            Idle Up/Dn LastChange HelloInt HelloTx/Rx MsgRcvd
x.x.x.89        5  3/2  20w0d 14:36:25        9 2786720/2786701 1995374
x.x.x.190       5 20/19 1w6d 13:26:40        9 1415096/1415046 1835890
r1-xxxx> show isis adjacency detail
r1-AMSIX1
  Interface: ge-0/3/0.0, Level: 2, State: Up, Expires in 26 secs
  Priority: 64, Up/Down transitions: 1, Last transition: 20w0d 14:37:46 ago
  Circuit type: 2, Speaks: IP, IPv6, MAC address: 0:90:69:9d:84:db
  Topologies: Unicast
  Restart capable: Yes
  LAN id: r1-AMSIX2.02, IP addresses: x.x.x.89
  IPv6 addresses: fe80::290:69ff:fe9d:84db
[snip]
r2-STH2
  Interface: so-1/2/0.0, Level: 2, State: Up, Expires in 24 secs
  Priority: 0, Up/Down transitions: 27, Last transition: 1w6d 13:27:40 ago
  Circuit type: 2, Speaks: IP, IPv6
  Topologies: Unicast
  Restart capable: Yes
  IP addresses: x.x.x.190
r1-xxxx> show ldp session detail | match "^Address|Up"
Address: x.x.y.97, State: Operational, Connection: Open, Hold time: 26
  Up for 1w6d 13:29:10
Address: x.x.x.2, State: Operational, Connection: Open, Hold time: 26
  Up for 15w0d 19:41:38
Address: x.x.x.64, State: Operational, Connection: Open, Hold time: 27
  Up for 20w0d 14:17:28
Address: x.x.x.67, State: Operational, Connection: Open, Hold time: 24
  Up for 44w1d 21:27:42
Address: x.x.x.68, State: Operational, Connection: Open, Hold time: 26
  Up for 15w5d 21:13:36
Address: x.x.x.72, State: Operational, Connection: Open, Hold time: 23
  Up for 00:13:54

Any thoughts on this matter would be greatly appreciated.

Cheers!
Eric