The MPLS WG Archive

["M.N.V.Suryanarayana" <suryam@future.futsoft.com>]

Hi,

In case of FA-LSP, the head-end LSR originates a TE LSA corresponding
to FA. Should the tail-end LSR also originate a TE LSA corresponding
to the FA? If so, how does the tail-end LSR knows that the LSP is
a FA-LSP in case of dynamically established FA-LSPs?

In section 7.2 of draft-ietf-mpls-lsp-hierarchy-05.txt, the following
statement
is not very clear.

"The LSR does this by looking up the interface
switching capabilities of the previous hop and
the next hop in its IGP database, and comparing
them using the relation defined in   Section 7.2"

>From Section 6.1, I understood that the LSR should compare the
near end ISC and far end ISC of the outgoing DC and if near end
ISC is < far end ISC then the LSR is an edge LSR. Does the above
statement imply the same.

Thanks & Regds,
Surya




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