Hi,
In a bit of off-list discussion, we had two threads:
1. would it be practical to assume that the RFC 3544
protocol would be present for IPHC/CRTP eCRTP? The answer
is that the implementations are not restricting themselves
to that design, so Kristofer Sandlun's thoughtful codepoint
suggestion isn't an option.
2. are there some very pressing reasons why vendors cannot
use eCRTP and find themselves using CRTP? The answer to
this turns out to be yes, and turns out to be
sometimes IPR, which is certainly not an unknown finding
for IETF...
I agreed to put cRTP back in the registrations with a note
that reflects that the use of cRTP has to be an informed tradeoff
(because the later IETF documents say that cRTP has risks for
general use). I've cc'd the AVT chairs because they may want
to take the new protocol takeup info into account. Of course,
no specifics - that's also not unknown for IETF.
Here's Yet Another List of these - maybe we are looking at our last one :)
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0x001A ROHC Transport Header-compressed Packets [RFC3095,
draft-ietf-rohc-over-reordering-03.txt]
0x001B eCRTP Transport Header-compressed Packets [RFC3545]
0x001C IPHC Transport Header-compressed Packets [RFC2507]
0x001D cRTP Transport Header-compressed Packets [RFC2508][Note 1]
[Note 1] Although CRTP is viewed as having risks for a number
PW environments due to misordering and loss, it is registered
because of markets where commercial issues lead to its choice
In these circumstances, it must be implemented and deployed
with care.
-- Add Informational Reference to draft-ietf-rohc-over-reordering-03.txt
------
I added the i-d that gives the advice about improving ROHC for
reordering to the references for ROHC. This was a good idea derived
from Kristopher's email.
I couldn't decide there was urgency to record Kristofer's additional guidance
IPHC and eCRTP here. But his expertise on these convinced me that IPHC can
be there without causing trouble,
So I hope this is it for this material.
Now, about part 1 of my Discuss, if Luca or the group will respond, I'd
love to settle this.
Allison