Timer-Based Reversion For Rsvp-Te Lsps - Alcatel-Lucent 7450 Manual

Timer-based Reversion for RSVP-TE LSPs

config
router
If there are no stat indices available when an LSP is instantiated, the assignment is failed and the
egress-statistics field in the show command for the LSP path will be in operational DOWN state
but in admin UP state.
An auto-created mesh LSP can also have ingress statistics enabled on the egress LER as long as
the user specifies the full LSP name following the above syntax.
configure>router>mpls>ingress-statistics>lsp lsp-name sender ip-address
Timer-based Reversion for RSVP-TE LSPs
The following secondary to primary path reversion is supported for RSVP-TE LSPs:
•
•
Normally, an RSVP-TE LSP automatically switches back from using a secondary path to the
primary path as soon as the primary path recovers. In some deployments, it is useful to delay
reversion or allow manual reversion, rather than allowing an LSP to revert to the primary path as
soon as it is available. This feature provides a method to manage fail-overs in the network.
If manual reversion is used, a fall-back timer-based mechanism is required in case a human
operator fails to execute the switch back to the primary path. This function is also useful to stagger
reversion for large numbers of LSPs.
A reversion timer for an LSP is configured using the CLI as follows:
config
router
When configured, the revert timer is started as soon as a primary path recovers. The LSP does not
revert from the currently used secondary path to the primary path until the timer expires. When
configured, the revert-timer is used instead of the existing hold timer.
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[no] mpls
lsp-template template-name mesh-p2p]
no lsp-template template-name
[no] egress-statistics
accounting-policy policy-id
no accounting-policy
[no] collect-stats
Configurable timer-based reversion for primary LSP path
Manual reversion from secondary to primary path
[no] mpls
lsp
[no] revert-timer <timer-value>
7450 ESS MPLS Guide