MPLS and RSVP
7450 ESS MPLS Guide Page 265
• MBB of secondary path due to an update to primary path SRLG.
• MBB due to FRR Global Revertive procedures on the primary path.
• Manual re-signaling of an LSP path or of all LSP paths by the user.
During a manual re-signaling of an LSP path, MPLS will always re-signal the path regardless of
whether the new path is exactly the same or different than the current path and regardless or whether
the metric of the new path is different or not from that of the current path.
During a timer-based re-signaling of an LSP path which has the least-fill option enabled, MPLS will
only re-signal the path if the metric of the new path is different than the one of the current path.
The user deletes a specific node entry in this database by executing the no form of this command.
Default no least-fill. The path of an LSP is randomly chosen among a set of equal cost paths.
ldp-over-rsvp
Syntax [no] ldp-over-rsvp [include | exclude]
Context config>router>mpls>lsp
Description This command configures an LSP so that it can be used by the IGP to calculate its SPF tree.
The IGP (OSPF/ISIS) will subsequently provide LDP with all ECMP IGP next-hops and tunnel
endpoints that it considers to be the lowest cost path to its destination.
If an IGP calculation and an LDP-over-RSVP indicate the same cost then LDP will always prefer an
LDP-over-RSVP tunnel over an IGP route and ECMP between the two types is not considered.
The type and number of tunnels considered by LDP depends on the IGP metrics (the lowest metric
between the tunnel endpoint and the target is selected) assuming that each LSP has a TLDP session
established between the endpoints.
Enter the command ldporsvp include to make the associated LSP available to be used by the LDP-
over-RSVP feature.
The no form of the command reverts to default operation.
Default ldporsvp exclude
include
Syntax [no] include group-name [group-name...(up to 5max)]
Context config>router>mpls>lsp
config>router>mpls>lsp>primary
config>router>mpls>lsp>secondary
Description This command specifies the admin groups to be included when an LSP is set up. Up to 5 groups per
operation can be specified, up to 32 maximum.
The no form of the command deletes the specified groups in the specified context.
Default no include
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