On 19 mei 2009, at 23:14, Joe Touch wrote:
Didn't you just suggest to just send enough of the original packet to
make ROHC do its thing? That piece of the packet should be small
enough
to always fit.
Yes, except that I also suggested sending the packet without any
ROHC on
it too.
Yes, but then you would still almost never have full-size packets so
the ROHC only saves bandwidth, not packets. Basically this will buy
you a 1 byte larger MTU, not worth the trouble because the IPsec
header already exposes you to PMTUD blackholes anyway.
Ideally, the decapsulator can tell the encapsulator what to do because
the decapsulator knows about whether it's behind a NAT with
fragmentation issues. But then there would have to be signaling that
carries this information.
