[Lsr] Temporary addition of links to flooding topology in dynamic flooding

[Robert Raszuk <[e-mail]>]

Hi,

As of now at the event of failure of any of the FT enabled link additional
links are being added in more or less random fashion by nodes directly
connected to the failed links.

In the event of 100s of links on such nodes and advisable rate limiting
addition of those links it seems that repair of FT may take some time.

In order to reduce such time interval better then random addition of
remaining links seems recommended. How about we hint participating nodes to
execute purely in control plane of FT an LFA algorithm for possible future
event of active link failure and use results of the LFA computation to
prioritize links which will be first temporary additions upon active
flooding links failures ?

Such optimization is local and optional and does not require any changes to
proposed protocol signalling.

*Therefor how about just one sentence addition to section 6.7.1
of draft-ietf-lsr-dynamic-flooding:*

*Temporary additions of links to flooding topology could be more educated
if given node runs a pure control plane LFA ahead of any FT failure on
active FT links completely detached from potential LFA runs for data plane
topology. *

Kind regards,
R.