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17-46 Riverstone Networks RS Switch Router User Guide Release 8.0
Configuring L3 Label Switched Paths MPLS Configuration
If the link between R1 and R4 becomes unavailable, the configured primary path for the dynamic LSP cannot be used.
The configured secondary path is then used for the LSP. A message like the following is displayed:
The secondary path ‘dp2l’ is now used for the LSP, as shown by the
mpls show label-switched-paths d1
verbose
command at R1. Note that the explicit path ‘dp1,’ the configured primary path, is now down and the
configured secondary path ‘dp2l’ is now both up and active.
hop-limit: 255 opt-int: 0 sec.
ott-index: 1 ref-count: 1
explicit-path: dp2l num-hops: 2
200.135.89.4 - loose
16.128.11.7 - loose
2001-04-06 16:13:24 %MPLS-I-LSPPATHSWITCH, LSP "d1" switching to Secondary Path "dp2l".
R1# mpls show label-switched-paths d1 verbose
Label-Switched-Path: d1
to: 3.3.3.3 from: 1.1.1.1
state: Up lsp-id: 0x9
proto: <rsvp> protection: secondary
setup-pri: 7 hold-pri: 0
attributes: <POLICY PRI SEC>
Protection-Path "dp1": <Primary>
State: Down lsp-id: 0x1000001
attributes: <>
Path-Signalling-Parameters:
attributes: <STANDBY RETRYING NO-CSPF>
inherited-attributes: <>
retry-limit: 5000 retry-int: 3 sec.
retry-count: 5000 next_retry_int: 600 sec.
bps: 0 preference: 7
hop-limit: 255 opt-int: 0 sec.
ott-index: ref-count: 1
mtu: 0
explicit-path: dp1 num-hops: 4
hop: 200.135.89.73 - strict
hop: 200.135.89.76 - strict
hop: 201.135.89.130 - strict
hop: 201.135.89.197 - strict
Protection-Path "dp2l": <Active, Secondary>
State: Up lsp-id: 0x1000002