Re: transmech editorial comments

[Erik Nordmark <Erik.Nordmark@sun.com>]

> This would be good independently, but the big picture is:
> 
>   IPv6-over-IPv4 tunnels are modeled as "single-hop".  That is, the
>    IPv6 hop limit is decremented by 1 when an IPv6 packet traverses the
>    tunnel.  The single-hop model serves to hide the existence of a
>    tunnel.  The tunnel is opaque to users of the network, and is not
>    detectable by network diagnostic tools such as traceroute.
> 
>    The single-hop model is implemented by having the encapsulators and
>    decapsulators process the IPv6 hop limit field as they would if they
>    were forwarding a packet on to any other datalink.  That is, they
>    decrement the hop limit by 1 when forwarding an IPv6 packet.  (The
>    originating node and final destination do not decrement the hop  
>    limit.)
> 
> ... wouldn't we just be repeating the second paragraph in a bit shorter 
> fashion?

The text actual reads as the first paragraph introduces the concept of
the single-hop tunnel and I think that one becomes a bit thin if the 2nd
sentence is dropped. I'll suggest other ways of making the concept
more clear.
The second paragraph is then about the implementation of the concept.

> Btw, maybe one should reword "implemented", because that isn't really 
> "implementation-specific", to avoid that connotation.  Maybe use 
> "achieved" ?

I'll find a better word.

  Erik