Hi Alex,
I've not configured any firewall filters.
Please check the below o/p where the ingress receives PATH_ERROR repeatedly from downstream router. I'm not sure why it signals LSP eventhough CSPF computation has failed.
[scenario - Bring up LSP & later reduce bandwidth on transit link so that it doesn't match LSPs requested bandwidth].
root@mp-m7-1# run show mpls lsp extensive
Ingress LSP: 1 sessions
192.168.20.2
From: 100.2.1.17, State: Up, ActiveRoute: 0, LSPname: test2
ActivePath: pri_link1 (primary)
LSPtype: Static Configured
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary pri_link1 State: Up
Priorities: 7 0
Bandwidth: 100Mbps
SmartOptimizeTimer: 180
Reoptimization in 111 second(s).
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 2)
192.168.10.2 S 192.168.20.2 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt 20=Node-ID):
192.168.10.2 192.168.20.2
16 Jul 17 06:13:03.414 CSPF failed: no route toward 192.168.20.2
15 Jul 17 06:13:03.400 100.2.1.1: Requested bandwidth unavailable[3 times]
14 Jul 17 06:12:50.182 CSPF failed: no route toward 192.168.20.2
13 Jul 17 06:12:50.182 100.2.1.1: Requested bandwidth unavailable[4 times]
12 Jul 17 06:12:34.501 CSPF failed: no route toward 192.168.20.2
11 Jul 17 06:12:30.973 100.2.1.1: Requested bandwidth unavailable[2 times]
10 Jul 17 06:12:21.345 CSPF failed: no route toward 192.168.20.2
9 Jul 17 06:12:21.344 100.2.1.1: Requested bandwidth unavailable
8 Jul 17 06:12:04.540 CSPF failed: no route toward 192.168.20.2[2 times]
7 Jul 17 06:11:36.784 100.2.1.1: No Route toward dest
6 Jul 17 06:07:41.876 Selected as active path
5 Jul 17 06:07:41.864 Record Route: 192.168.10.2 192.168.20.2
4 Jul 17 06:07:41.842 Up
3 Jul 17 06:07:41.585 Originate Call
2 Jul 17 06:07:41.585 CSPF: computation result accepted 192.168.10.2 192.168.20.2
1 Jul 17 06:07:12.294 CSPF failed: no route toward 192.168.10.2[4 times]
Created: Sat Jul 17 06:05:41 2010
Total 1 displayed, Up 1, Down 0
Egress LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
[edit]
root@mp-m7-1#
Thanks,
Vijaykumar Arumugam