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MPLS and RSVP-TE
Description
This command specifies the maximum number of hops that an LSP can traverse, including
the ingress and egress routers. An LSP is not set up if the hop limit is exceeded. This value
can be changed dynamically for an LSP that is already set up, with the following implications:
The no form of this command returns the parameter to the default value.
Default
255 (LSP and LSP mesh template)
2 (one-hop template)
Parameters
number — specifies the number of hops the LSP can traverse, expressed as an integer
igp-shortcut
Syntax
igp-shortcut [lfa-protect | lfa-only] [relative-metric [offset]]
no igp-shortcut
Context
config>router>mpls>lsp
config>router>mpls>lsp-template
Description
This command enables the use of an RSVP-TE LSP by OSPF or IS-IS routing protocols as
a shortcut or as a forwarding adjacency for resolving IGP routes.
When the rsvp-shortcut or the advertise-tunnel-link command is enabled at the OSPF or
IS-IS instance level, all RSVP-TE LSPs originating on this node are eligible by default as long
as the destination address of the LSP, as configured with the config>router>mpls>lsp>to
command, corresponds to a router ID of a remote node.
If the command is used with no options, and the rsvp-shortcut command is enabled, the LSP
is included in the main SPF but not in the LFA SPF algorithm. If the advertise-tunnel-link
command is enabled, the tunnel is advertised as a point-to-point link if it has the best LSP
metric, is included in the main SPF if advertised, but is not included in the LFA SPF algorithm.
If the command is used with the lfa-protect option, and the rsvp-shortcut command is
enabled, an LSP can be included in both the main SPF and the LFA SPF algorithm. If the
advertise-tunnel-link command is enabled, the tunnel is advertised as a point-to-point link
if it has the best LSP metric, is included in the main SPF if advertised, and is included in the
LFA SPF algorithm whether it is advertised or not.
194
• If the new value is less than the current number of hops of the established LSP, the LSP
is brought down. The 7705 SAR then tries to re-establish the LSP within the new
hop-limit number. If the new value is equal to or greater than the current number of hops
of the established LSP, the LSP is not affected.
Values
2 to 255
Use subject to Terms available at: www.nokia.com
© 2022 Nokia.
MPLS Guide
3HE 18686 AAAB TQZZA
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