>
> >At a minimum, implementations should be able to convert the=20 ICMP
> >errors happening from within the IPv4 tunnel back to ICMPV6
> error and
> >send it back to the original sender (IPv6 sender in case of
> IPv6 over
> >IPv4 tunnels). Otherwise path mtu discovery will never work assuming
> >you set the DF bit in the IPv4 header. if you do this, storing the
> >state is not really complex I guess.
>
> if you don't set DF bit on IPv4 packet (after encapsulation),
> it is not mandatory to convert ICMPv4 to ICMPv6
> (actually, you won't
> see ICMPv4 need fragment). simpler the better.
>
I am not really sure how much more simpler it would be (it is extra
lines of code). But you are arguing that doing path mtu discovery
is not useful because it would make the code complex which I
don't understand.
-mohan
> itojun
>
