Alcatel-Lucent 7450 Manual page 221

secondary-fast-retry-timer
Syntax secondary-fast-retry-timer seconds
no secondary-fast-retry-timer
Context config>router>mpls
Description
This command specifies the value used as the fast retry timer for a secondary path. If the first attempt
to set up a secondary path fails due to a path error, the fast retry timer will be started for the secondary
path so that the path can be retried sooner. If the next attempt also fails, further retries for the path will
use the configured value for LSP retry timer.
If retry-timer for the LSP is configured to be less than the MPLS secondary-fast-retry-timer, all retries
for the secondary path will use the LSP retry-timer.
The no form of the command reverts to the default.
Default
no secondary-fast-retry-timer
Parameters seconds — specifies the value, in seconds, used as the fast retry timer for a secondary path
srlg-frr
Syntax srlg-frr [strict]
no srlg-frr
Context config>router>mpls
Description This command enables the use of the Shared Risk Loss Group (SRLG) constraint in the computation
of FRR bypass or detour to be associated with any primary LSP path on this system.
When this option is enabled, CSPF includes the SRLG constraint in the computation of a FRR detour
or bypass for protecting the primary LSP path.
CSPF prunes all links with interfaces which belong to the same SRLG as the interface which is being
protected, i.e., the outgoing interface at the PLR the primary path is using. If one or more paths are
found, the MPLS/RSVP task will select one based on best cost and will signal the bypass/detour. If
not and the user included the strict option, the bypass/detour is not setup and the MPLS/RSVP task
will keep retrying the request to CSPF. Otherwise, if a path exists which meets the other TE
constraints, other than the SRLG one, the bypass/detour is setup.
A bypass or a detour LSP path is not guaranteed to be SRLG disjoint from the primary path. This is
because only the SRLG constraint of the outgoing interface at the PLR the primary path is using is
checked.
When the MPLS/RSVP task is searching for a SRLG bypass tunnel to associate with the primary path
of the protected LSP, it will first check if any configured manual bypass LSP with CSPF enabled
satisfies the SLRG constraints. The MPLS/RSVP skips any non-CSPF bypass LSP in the search as
there is no ERO returned to check the SLRG constraint. If no path is found, it will check if an existing
dynamic bypass LSP satisfies the SLRG and other primary path constraints. If not, then it will make a
request to CSPF.
7450 ESS MPLS Guide
Values
1 — 10
MPLS and RSVP
Page 221