Technical Summary
To facilitate the establishment of Label Switched Paths (LSP) that
would span multiple IGP areas in a given Autonomous System (AS), this
document proposes a new optional label mapping procedure for the
Label Distribution Protocol (LDP).
This procedure allows the use of a label if the Forwarding
Equivalence Class (FEC) Element matches an entry in the routing table
(RIB). Matching is defined by an IP longest match search and does not
mandate an exact match.
Working Group Summary
No controversy reported. This has been reviewed by people who know
LDP very well, including senior implementers.
Document Quality
There is at least one known implementation.
The shepherding AD (Ross Callon), who also happens to be co-author of
the MPLS Architecture (but not of the LDP document), sort of wonders
why we didn't do it this way in the first place (IMHO this cleans up
a small oversight in the original documentation).
Personnel
Loa Andersson is the document shepherd (and wrote the PROTO writeup
that is available as a comment in the tracker), but both WG co-chairs
(Loa and George) have reportedly reviewed the draft. Ross Callon
is the responsible area director. There are no IANA actions needed.