Advertising MPLS labels in OSPF
2013
Historically MPLS label distribution was driven by protocols like LDP,
RSVP and LBGP. All of those protocols are session oriented. In order
to obtain label binding for a given destination FEC from a given
router one needs first to establish an LDP/RSVP/LBGP session with that
router. Advertising MPLS labels in IGPs [I-D.gredler-rtgwg-igp-label-
advertisement] describes several use cases where utilizing the
flooding machinery of link-state protocols for MPLS label distribution
allows to obtain the binding without requiring to establish an
LDP/RSVP/LBGP session with that router. This document describes the
protocol extension to distribute MPLS label bindings by the OSPFv2 and
OSPFv3 protocol.
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