Step 1: Verify the LSP

Action

To verify the LSP, enter the following command on the ingress, transit, and egress routers:

user@host> show mpls lsp extensive

Sample Output 1

user@R1> show mpls lsp extensive 

Ingress LSP: 1 sessions

10.0.0.6

  From: 10.0.0.1, State: Dn, ActiveRoute: 0, LSPname: R1-to-R6

  ActivePath: (none)

  LoadBalance: Random

  Encoding type: Packet, Switching type: Packet, GPID: IPv4

  Primary                    State: Dn

   24 Oct 21 13:48:01 No Route toward dest[3 times]

   23 Oct 21 13:47:44 Deselected as active

   22 Oct 21 13:47:43 No Route toward dest[2 times]

   21 Oct 21 13:47:43 ResvTear received

   20 Oct 21 13:47:43 Down

   19 Oct 21 13:47:43 10.1.13.2: No Route toward dest[2 times]

   18 Oct 21 13:47:38 Record Route:  10.1.13.2 10.1.36.2

   [...Output truncated...]

  Created: Tue Oct 19 21:22:53 2004

Total 1 displayed, Up 0, Down 1

Egress LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Sample Output 2

user@R3> show mpls lsp extensive

Ingress LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Egress LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Sample Output 3

user@R6> show mpls lsp extensive

Ingress LSP: 1 sessions

10.0.0.1

  From: 10.0.0.6, State: Dn, ActiveRoute: 0, LSPname: R6-to-R1

  ActivePath: (none)

  LoadBalance: Random

  Encoding type: Packet, Switching type: Packet, GPID: IPv4

  Primary                    State: Dn

    Will be enqueued for recomputation in 3 second(s).

   13 Oct 21 14:23:33 CSPF failed: no route toward 10.0.0.1[90 times]

   12 Oct 21 13:39:56 Deselected as active

   11 Oct 21 13:39:56 CSPF: could not determine self

   [...Output truncated...]

  Created: Tue Oct 19 22:28:30 2004

Total 1 displayed, Up 0, Down 1

Egress LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

Transit LSP: 0 sessions

Total 0 displayed, Up 0, Down 0

What It Means

The sample output shows that LSP R1-to-R6 and the reverse LSP R6-to-R1 are down, and there are no LSP sessions on transit router R3.