I wrote that based on a conversation a while back with Carsten (before he was 
chair) 
in which he said this was not typically done. 

Carsten, care to elaborate?

As for the effect on the draft, we can just delete this text if there's any 
objection.
It was just meant as background info and has no normative weight whatsoever.

-gabriel

--- David Green <[EMAIL PROTECTED]> wrote:


---------------------------------
draft-ietf-6lowpan-format-01.txt section 8: 
 
"Given the very limited packet sizes, it is highly desirableto
      integrate layer 2 with layer 3compression, something typically
      notdone."
 
Actually link-layer assist is quite commonly done - see:

RFC 3242 - RObust Header Compression (ROHC): A Link-LayerAssisted Profile for 
IP/UDP/RTP
 
Also, I have a draft written on point-to-multipoint headercompression that you 
may find
useful for this section. 
 
-David Green
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