Re: AD comments on draft-ietf-rohc-hcoipsec-10

Carsten Bormann skrev:
> On May 18, 2009, at 15:21, Magnus Westerlund wrote:
> 
>> some consideration
>> on what to do with it.
> 
> So what would you want the compressor to do?
> Run PLPMTUD (probes can be done by occasionally compressing badly*) on
> the tunnel and reject (ICMP unreachable/Frag needed) all DF/IPv6
> packets that would not fit with worst-case expansion?
> Probably safe, but somewhat expensive.
> 
> Gruesse, Carsten
> 
> *) Yes, this needs way more text.
> You would need to compress badly whenever compressing a packet that,
> badly compressed, would not fit the currently established safe PMTU. 
> That unfortunately tends to shrink while compressing well, which ROHC
> tends to do :-)
> 
> 


Please join the discussion on the TSV-area list. It at least got the
attention of some TCP folk, but I think there needs to be some ROHC
input into this discussion also.

cheers

Magnus Westerlund

IETF Transport Area Director & TSVWG Chair
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