Re: 10.0.0

[John Hawkinson <jhawk () bbnplanet com>]

> I've noted several providers, including a couple of better-known ones,
> using RFC1597 addresses internally. While not a Really Optimal Solution, it
> does work, and if you find yourself with only a couple of class C's to work
> with.. I'd probably rather preserve them for my customers, and go with
> whatever I had to internally, as long as packets still got from A to B.
>
> The only services that should be affected by the use of such "bogus"
> addresses will be traceroute and any routing information passed by the
> device. 

Unfortunately that's not quite true.

There are a variety of services which rely on messages received from
intermediate hops that would break if the the sending host happened
to filter out RFC1918 addresses and a part of the network
were using them.

Probably the best example is Path MTU Discovery.

--jhawk