Alcatel-Lucent 7450 Manual page 220

MPLS Commands
thd under the MPLS context such that a path will only be moved when the difference of the least-
available bandwidth becomes significant enough between the most used links in the equal cost paths.
If that difference is not significant enough, CSPF will select the path with the most overlapping links
instead of selecting a path randomly.
The procedures when the new mbb-prefer-current-hops option is enabled apply to all MBB types.
Thus, it applies to the auto-bandwidth MBB, the configuration change MBB, the soft pre-emption
MBB, the TE graceful shutdown MBB, the delayed retry MBB (for SRLG secondary LSP path), the
path change MBB, the timer resignal MBB, and the manual resignal MBB.
During the FRR global revertive MBB, CSPF selects a random link among the ones available
between the PLR node and the Merge Point node, including the failed link if it has restored in the
meantime. These links cannot be checked for overlap with the current path.
The TE graceful shutdown MBB will still avoid the link or node that is in maintenance and the soft
pre-emption MBB will still avoid the link that is overbooked.
For an inter-area LSP, this feature applies to the subset of the path from the ingress LER to the exit
ABR.
The procedures of this feature are not applied to a zero bandwidth CSFP LSP, including an auto-
bandwidth CSPF LSP while its operational bandwidth is zero, and to a non-CSPF LSP.
resignal-timer
Syntax resignal-timer minutes
no resignal-timer
Context config>router>mpls
Description This command specifies the value for the LSP resignal timer. The resignal timer is the time, in
minutes, the software waits before attempting to resignal the LSPs.
When the resignal timer expires, if the new computed path for an LSP has a better metric than the
current recorded hop list, an attempt is made to resignal that LSP using the make-before-break
mechanism. If the attempt to resignal an LSP fails, the LSP will continue to use the existing path and
a resignal will be attempted the next time the timer expires.
The no form of the command disables timer-based LSP resignalling.
Default no resignal-timer
Parameters minutes — The time the software waits before attempting to resignal the LSPs.
retry-on-igp-overload
Syntax [no] retry-on-igp-overload
Context config>router>mpls
Description
This command enables tearing down LSPs when IGP is in overload state.
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Values 30 — 10080
7450 ESS MPLS Guide