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MPLS and RSVP-TE
pce-computation
Syntax
[no] pce-computation
Context
config>router>mpls>lsp
Description
This command enables a PCE-computed LSP mode of operation for RSVP-TE LSPs and SR-
TE LSPs.
The user can grant only path computation requests (PCE-computed) or both path
computation requests and path update (PCE-controlled) to a PCE for a specific LSP.
The pce-computation option allows the path computation request to be sent to the PCE
instead of the local CSPF. Enabling this option allows the PCE to perform path computations
for the LSP at the request of the PCC router only. This is used in cases where the operator
wants to make use of the PCE-specific path computation algorithm instead of the local router
CSPF algorithm.
The default configuration is no pce-computation. The enabling of the pce-computation
option or pce-control option requires that the cspf option first be enabled; otherwise, this
configuration will be rejected. Conversely, an attempt to disable the cspf option on an
LSP that has the pce-computation option or pce-control option enabled will be rejected.
Default
no pce-computation
pce-control
Syntax
[no] pce-control
Context
config>router>mpls>lsp
Description
This command enables a PCE-controlled LSP mode of operation for RSVP-TE LSPs and SR-
TE LSPs.
The pce-control option means that the PCC router delegates full control of the LSP to the
PCE (PCE-controlled). Enabling PCE control means that the PCE is acting in active stateful
mode for this LSP; the PCE will be able to reroute the path following a failure or reoptimize
the path and update the router without the PCC router requesting the update.
The user can delegate CSPF and non-CSPF LSPs, or LSPs that have the pce-computation
option enabled or disabled. The LSP maintains its latest active path computed by the PCE or
the PCC router at the time it is delegated. The PCE will only make an update to the path at
the next network event or reoptimization.
The default configuration is no pce-control. The enabling of the pce-control option or
pce-computation option requires that the cspf option first be enabled; otherwise, this
configuration will be rejected. Conversely, an attempt to disable the cspf option on an
LSP that has the pce-control option or pce-computation option enabled will be rejected.
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Use subject to Terms available at: www.nokia.com
MPLS Guide
3HE 18686 AAAB TQZZA
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