Re: An ethernet frame with two IP packets inside?

[Darren Reed <darrenr () reed wattle id au>]

In some email I received from cbrenton, sie wrote:
> On Sat, 24 Oct 1998, Keller wrote:
>
> > what happens if one ethernet frame contains two IP packets?
>
> There are actually quite a few instances where this is useful. Check out
> IP type 4 (IP over IP), IP type 47 (GRE) and IP type 18 (multiplexing).
> These are the most popular.

IP over IP is essentially IP in IP, so I'd argue that it isn't two
frames, just one with a wrapper around it to allow transportation
across a network which may not deal with it in the "right" way (IPSEC
works this way and hence some VPN products too).

Darren