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Verify the LSP Again
Purpose
After taking the appropriate action to correct the error, the label-switched path (LSP) needs to be checked again to confirm that the problem in the RSVP layer has been resolved.
Action
To verify that the LSP is up and traversing the network as expected, enter the following command from the ingress, egress, and transit 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: Up, ActiveRoute: 1 , LSPname: R1-to-R6
ActivePath: (primary)
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary State: Up
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 20)
10.1.13.2 S 10.1.36.2 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt):
10.1.13.2 10.1.36.2
5 Oct 21 15:52:07 Selected as active path
4 Oct 21 15:52:07 Record Route: 10.1.13.2 10.1.36.2
3 Oct 21 15:52:07 Up
2 Oct 21 15:52:07 Originate Call
1 Oct 21 15:52:07 CSPF: computation result accepted
Created: Thu Oct 21 15:52:06 2004
Total 1 displayed, Up 1 , Down 0
Egress LSP: 1 sessions
10.0.0.1
From: 10.0.0.6, LSPstate: Up, ActiveRoute: 0
LSPname: R6-to-R1 , LSPpath: Primary
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: -
Resv style: 1 FF, Label in: 3, Label out: -
Time left: 142, Since: Thu Oct 21 15:41:59 2004
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 2 receiver 39082 protocol 0
PATH rcvfrom: 10.1.13.2 (so-0/0/2.0) 17 pkts
Adspec: received MTU 1500
PATH sentto: localclient
RESV rcvfrom: localclient
Record route: 10.1.36.2 10.1.13.2 <self>
Total 1 displayed, Up 1 , 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: 2 sessions 10.0.0.1 From: 10.0.0.6, LSPstate: Up, ActiveRoute: 1 LSPname: R6-to-R1 , LSPpath: Primary Suggested label received: -, Suggested label sent: - Recovery label received: -, Recovery label sent: 3 Resv style: 1 FF, Label in: 100528, Label out: 3 Time left: 125, Since: Thu Oct 21 15:29:26 2004 Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500 Port number: sender 2 receiver 39082 protocol 0 PATH rcvfrom: 10.1.36.2 (so-0/0/3.0) 17 pkts Adspec: received MTU 1500 sent MTU 1500 PATH sentto: 10.1.13.1 (so-0/0/2.0) 17 pkts RESV rcvfrom: 10.1.13.1 (so-0/0/2.0) 17 pkts Explct route: 10.1.13.1 Record route: 10.1.36.2 <self> 10.1.13.1 10.0.0.6 From: 10.0.0.1, LSPstate: Up, ActiveRoute: 1 LSPname: R1-to-R6 , LSPpath: Primary Suggested label received: -, Suggested label sent: - Recovery label received: -, Recovery label sent: 3 Resv style: 1 FF, Label in: 100544, Label out: 3 Time left: 147, Since: Thu Oct 21 15:39:33 2004 Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500 Port number: sender 1 receiver 47963 protocol 0 PATH rcvfrom: 10.1.13.1 (so-0/0/2.0) 4 pkts Adspec: received MTU 1500 sent MTU 1500 PATH sentto: 10.1.36.2 (so-0/0/3.0) 4 pkts RESV rcvfrom: 10.1.36.2 (so-0/0/3.0) 4 pkts Explct route: 10.1.36.2 Record route: 10.1.13.1 <self> 10.1.36.2 Total 2 displayed, Up 2, 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: Up, ActiveRoute: 1, LSPname: R6-to-R1
ActivePath: (primary)
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary State: Up
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 20)
10.1.36.1 S 10.1.13.1 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt):
10.1.36.1 10.1.13.1
18 Oct 21 15:34:18 Selected as active path
17 Oct 21 15:34:17 Record Route: 10.1.36.1 10.1.13.1
16 Oct 21 15:34:17 Up
15 Oct 21 15:34:17 Originate Call
14 Oct 21 15:34:17 CSPF: computation result accepted
[...Output truncated...]
Created: Tue Oct 19 22:28:30 2004
Total 1 displayed, Up 1, Down 0
Egress LSP: 1 sessions
10.0.0.6
From: 10.0.0.1, LSPstate: Up, ActiveRoute: 0
LSPname: R1-to-R6 , LSPpath: Primary
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: -
Resv style: 1 FF, Label in: 3, Label out: -
Time left: 126, Since: Thu Oct 21 15:44:25 2004
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 1 receiver 47963 protocol 0
PATH rcvfrom: 10.1.36.1 (so-0/0/3.0) 4 pkts
Adspec: received MTU 1500
PATH sentto: localclient
RESV rcvfrom: localclient
Record route: 10.1.13.1 10.1.36.1 <self>
Total 1 displayed, Up 1, Down 0
Transit LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
Meaning
Sample Outputs 1 and 3 from ingress router R1 and egress router R6 show that the LSP is now traversing the network along the expected path, from R1 through R3 to R6, and the reverse LSP, from R6 through R3 to R1. In addition, Sample Output 2 from transit router R3 shows that there are two transit LSP sessions, one from R1 to R6, and the other from R6 to R1.
