Re: [rohc] Path MTU discovery when having varying MTU

On 19 mei 2009, at 20:14, Joe Touch wrote:

> Does ROHC allow through packets that are not ROHC-tagged?

> 	a) send the packet without ROHC

> 	b) send a copy of the packet with no payload
> 	with the ROHC tags

That doesn't help much, because the only thing you save here is the  
"hey set up state for what follows" indicator in ROHC. Being  
unfamiliar with ROHC I'll go out on a limb and assume this is only a  
byte or so.

Assuming that we can predict if and how well a certain flow will  
compress, we could also simply drop a) and send back a too big with  
the size that will compress to what fits inside the MTU and just send  
b) through the tunnel.