June 2004
Intermediate to advanced
840 pages
39h 47m
English
Content preview from The Internet and Its Protocols
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9.4 Label Distribution Protocol (LDP) 421
Fioure
9.30 LDP message flows for Downstream Unsolicited label advertisement.
which is able to respond at once with a Label Mapping message. LSR B updates
its tables and does not need to tell LSR A about any changes.
A Label Release message can also be used by an upstream LSR to show that
it no longer wishes to use a label that was previously advertised to it. As with
the Label Withdraw message, the unit of currency on the Label Release message
is the FEC so that the upstream node is saying that it is no longer interested in
reaching the specified FEC(s) and ...
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