Verifying Path Protection in an MPLS Network
To verify that path protection is working correctly on EX Series switches, perform the following tasks:
Verifying the Primary Path
Purpose
Verify that the primary path is operational.
Action
user@switch> show mpls lsp extensive
ingress
Ingress LSP: 2 sessions
127.1.8.8
From: 127.1.9.9, State: Up, ActiveRoute: 0, LSPname: lsp_to_240
ActivePath: primary_path_lsp_to_240 (primary)
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary primary_path_lsp_to_240 State: Up
Priorities: 7 0
SmartOptimizeTimer: 180
Exclude: red
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 2)
10.3.3.2 S 10.3.4.2 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt 20=Node-ID):
10.3.3.2 10.3.4.2
6 Mar 11 23:58:01.684 Selected as active path: due to 'primary'
5 Mar 11 23:57:00.750 Record Route: 10.3.3.2 10.3.4.2
4 Mar 11 23:57:00.750 Up
3 Mar 11 23:57:00.595 Originate Call
2 Mar 11 23:57:00.595 CSPF: computation result accepted 10.3.3.2 10.3.4.2
1 Mar 11 23:56:31.135 CSPF failed: no route toward 10.3.2.2[25 times]
Standby secondary_path_lsp_to_240 State: Up
Standby secondary_path_lsp_to_240 State: Up
Priorities: 7 0
SmartOptimizeTimer: 180
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 1)
10.3.5.2 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node 10=SoftPreempt 20=Node-ID):
10.3.5.2
7 Mar 11 23:58:01.684 Deselected as active: due to 'primary'
6 Mar 11 23:46:17.298 Selected as active path
5 Mar 11 23:46:17.295 Record Route: 5.5.5.2
4 Mar 11 23:46:17.287 Up
3 Mar 11 23:46:16.760 Originate Call
2 Mar 11 23:46:16.760 CSPF: computation result accepted 10.3.5.2
1 Mar 11 23:45:48.095 CSPF failed: no route toward 10.5.5.5[2 times]
Created: Wed Mar 11 23:44:37 2009
[Output truncated]
Meaning
As indicated by the ActivePath in the output, the LSP primary_path_lsp_to_240 is active.
Verifying the RSVP-Enabled Interfaces
Purpose
Verify the status of Resource Reservation Protocol (RSVP)-enabled interfaces and packet statistics.
Action
user@switch> show rsvp interfaces
RSVP interface: 1 active
Active Subscr- Static Available Reserved Highwater
Interface State resv iption BW BW BW mark
ge-0/0/20.0 Up 2 100% 1000Mbps 1000Mbps 0bps 0bps
Meaning
This output verifies that RSVP is enabled and operational on interface ge-0/0/20.0.
Verifying a Secondary Path
Purpose
Verify that a secondary path is established.
Action
Deactivate a switch that is critical to the primary path and then issue the following command:
user@switch> show mpls lsp extensive
Ingress LSP: 1 sessions
127.0.0.8
From: 127.0.0.1, State: Up, ActiveRoute: 0, LSPname: lsp_to_240
ActivePath: secondary_path_lsp_to_240 (secondary)
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
Primary primary_path_lsp_to_240 State: Dn
Priorities: 7 0
SmartOptimizeTimer: 180
Exclude: red
Will be enqueued for recomputation in 8 second(s).
51 Mar 8 12:23:31.268 CSPF failed: no route toward 127.0.0.11[11420 times]
50 Mar 4 15:35:25.610 Clear Call: CSPF computation failed
49 Mar 4 15:35:25.610 CSPF: link down/deleted: 127.0.0.2(127.0.0.1:0)(127.0.0.1)->
0.0.0.0(127.0.0.20:0)(127.0.0.20)
48 Mar 4 15:35:25.576 Deselected as active
47 Mar 4 15:35:25.550 No Route toward dest
46 Mar 4 15:35:25.550 ?????
45 Mar 4 15:35:25.549 127.0.0.12: Down
44 Mar 4 15:33:29.839 Selected as active path
43 Mar 4 15:33:29.837 Record Route: 127.0.0.20 127.0.0.40
42 Mar 4 15:33:29.835 Up
41 Mar 4 15:33:29.756 Originate Call
40 Mar 4 15:33:29.756 CSPF: computation result accepted 127.0.0.20 127.0.0.40
39 Mar 4 15:33:00.395 CSPF failed: no route toward 127.0.0.11[7 times]
38 Mar 4 15:30:31.412 Clear Call: CSPF computation failed
37 Mar 4 15:30:31.412 CSPF: link down/deleted: 127.0.0.2(127.0.0.1:0)(127.0.0.1)->
0.0.0.0(127.0.0.20:0)(127.0.0.20)
36 Mar 4 15:30:31.379 Deselected as active
35 Mar 4 15:30:31.350 No Route toward dest
34 Mar 4 15:30:31.350 ?????
33 Mar 4 15:30:31.349 127.0.0.12: Down
32 Mar 4 15:29:05.802 Selected as active path
31 Mar 4 15:29:05.801 Record Route: 127.0.0.20 127.0.0.40
30 Mar 4 15:29:05.801 Up
29 Mar 4 15:29:05.686 Originate Call
28 Mar 4 15:29:05.686 CSPF: computation result accepted 127.0.0.20 127.0.0.40
27 Mar 4 15:28:35.852 CSPF failed: no route toward 127.0.0.11[132 times]
26 Mar 4 14:25:12.113 Clear Call: CSPF computation failed
25 Mar 4 14:25:12.113 CSPF: link down/deleted: 0.0.0.0(127.0.0.20:0)(127.0.0.20)->
0.0.0.0(10.10.10.10:0)(10.10.10.10)
*Standby secondary_path_lsp_to_240 State: Up
Priorities: 7 0
SmartOptimizeTimer: 180
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 1)
[Output truncated]Meaning
As indicated by the ActivePath in the output, the LSP secondary_path_lsp_to_240 is active.
Related Topics
- Configuring Path Protection in an MPLS Network (CLI Procedure)
- Understanding MPLS and Path Protection on EX Series Switches
- For information on the show mpls lsp and show rvsp interfaces commands, see the Junos OS MPLS Applications Configuration Guide at http://www.juniper.net/techpubs/software/junos/index.html.
