A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : MPLS Multicast Encapsulations
Author(s) : T. Eckert, et al.
Filename : draft-rosen-mpls-multicast-encaps-00.txt
Pages : 9
Date : 2005-4-8
RFC 3032 established two data link layer codepoints for MPLS: one to
indicate that the data link layer frame is carrying an MPLS unicast
packet, and the other to indicate that the data link layer frame is
carrying an MPLS multicast packet. This specification updates
RFC3032 by redefining the meaning of these two codepoints. The
former "multicast codepoint" is now to be used only on multiaccess
media, and it is to mean "the top label of the following label stack
is an upstream-assigned label". The former "unicast codepoint" is to
be used in all other cases. Whether the data link layer payload is a
unicast MPLS packet or a multicast MPLS packet is now to be
determined by looking up the top label, rather than by the codepoint.
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