Hi Shraddha,
On 26/07/2021 22:16, Shraddha Hegde wrote:
WG,
Regarding Peter’s comment on the mic that TI-LFA can divert from post
convergence path when SRLG is used for computation I would like to clarify > that an operator is expected to do planning for the post convergence
path accounting for the SRLG failures.
TI-LFA does not always guarantee that backup path follows the
post-convergence path.
It depends on what is the type of the backup computed and what is the
actual failure. When the two do not match, we can not guarantee the
backup path being equal to post convergence one.
An example is when you are calculating a node protecting backup, but the
actual failure is a link failure, your backup path may not be the same
as the post convergence one.
thanks,
Peter
draft-hu-spring-segment-routing-proxy-forwarding-14 is proposing a
mechanism which will
divert the traffic based on nodes being upgraded to support the
protection. The paths
could be quite divergent from post-convergence path and an operator
would be expected
to do planning to ensure these paths have sufficient bandwidth to take
on traffic.
Rgds
Shraddha
Juniper Business Use Only
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