MPLS and RSVP-TE
190
MPLS Guide
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Use subject to Terms available at: www.nokia.com
3HE 18686 AAAB TQZZA
exclude
Syntax [no] exclude group-name [group-name...(up to 5 max)]
Context config>router>mpls>lsp
config>router>mpls>lsp>primary
config>router>mpls>lsp>secondary
config>router>mpls>lsp-template
Description This command specifies the admin groups to be excluded when an LSP is set up. Up to 5
groups per operation can be specified, up to 32 maximum. The admin groups are defined in
the config>router>if-attribute context.
Use the no form of the command to remove the exclude command.
Default no exclude
Parameters group-name — specifies the existing group name to be excluded when an LSP is set up
fast-reroute
Syntax [no] fast-reroute [frr-method]
Context config>router>mpls>lsp
config>router>mpls>lsp-template
Description This command creates a precomputed protection LSP from each node in the path of the LSP.
If a link or LSP failure occurs between two nodes, traffic is immediately rerouted on the
precomputed protection LSP. When fast-reroute is specified, the default fast-reroute
method is the one-to-one method.
When fast-reroute is enabled, each node along the path of the LSP tries to establish a
protection LSP as follows.
• Each upstream node sets up a protection LSP that avoids only the immediate
downstream node, and merges back onto the actual path of the LSP as soon as
possible.
• If it is not possible to set up a protection LSP that avoids the immediate downstream
node, a protection LSP can be set up to the downstream node on a different interface.
• The protection LSP may take one or more hops (see igp-shortcut) before merging back
onto the main LSP path.
• When the upstream node detects a downstream link or node failure, the ingress router
switches traffic to a standby path if one was set up for the LSP.
FRR is available only for the primary path. No configuration is required on the transit hops of
the LSP. The ingress router will signal all intermediate routers using RSVP-TE to set up their
protection LSP. TE must be enabled for fast reroute to work.
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