(S,G) flag on first hop router

From: Jian Gu (guxiaojian@gmail.com)
Date: Fri Jan 20 2006 - 03:40:25 GMT-3


Hi, all,
Assuming a multicast group is running sparse mode, what could be flag for
(S,G) entry on first hop router? I think it should always be FT,
it will have F flag because the group needs to register with RP, it will
also have "T" flag because it is always in shortest path tree. However, in
one or my lab setup, a (S,G) entry on first hop router only has "T" flag,
why?

Thanks,
Jian



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