Re: [mpls] [Idr] Fwd: Working Group adoption poll on draft-rosen-mpls-rfc3107bis

[Robert Raszuk <[e-mail]>]

Hi Eric,

While adoption call is sort of encouragement for further input before I
respond to Loa's mail I would like to get one additional answer from
3107bis authors and WGs members.

Those who spend years in mpls deployment know quite well that the biggest
issue with today's 3107 deployment is lack of the clear definition of its
interaction with SAFI-1. While one would hope that 3107bis with new
capability will clean this mess section 5 of your document rather sweeps it
all under the carpet stating that it is just local policy. IMO it is not a
matter of local policy nor it is implementation detail.

Local policy can be to choose which RIB (or sequence of RIBs) should be
used for resolution of specific SAFIs and not how to mix SAFI-1 with
SAFI-4. It's not a local matter at all to have deployment resulting in
inconsistent IBGP best paths across given domain.

To me cleanest is to separate those two SAFIs completely from each other by
the spec both in BGP (done) as well as local RIB and FIB/LFIB.

Likewise I do not quite agree that SAFI-4 should be "convertible" to
SAFI-1. And we all realize that opposite direction is rather hard.

Another perhaps minor clarification would be to get an explicit
confirmation that SAFI-4 can be recursive over SAFI-4 or for that matter
SAFI-1 (MPLS in GRE or SR in IP).

Thx,
R.