DNAME issues (was Re: ip6.int deprecation)

[Niall Murphy]

> Testing is what you do to find problems. If you know the problems are 
> there, it's no longer testing. If it were, then pretty much everything 
> we do could be considered testing. For instance, having a chat with 
> b.root-servers.net:
>
> 13:07:48.739256 IP (tos 0x0, ttl  48, id 0, offset 0, flags [DF], 
> length: 464) 192.228.79.201.53 > 82.192.90.27.59886:  24038*- 13/0/13 
> . NS C.ROOT-SERVERS.NET., .[|domain]
>
> The observant reader will note that on this UDP packet the DF bit is 
> set. A slightly more observant reader will note that in IPv4, setting 
> the DF bit on UDP packets guarantees breakage if the packet encounters 
> a link with an MTU smaller than the packet's size.
I believe 576 is the lowest MTU in IPv4, so I'm not sure what this 
example is intended to demonstrate...

Niall