I'm running a pair of NetBSD systems that are nearly connected to each other,
and I've noticed the following:

When they're on ethernet together, they're fast (~300k/s).

When one of them talks to a linux box through ethernet, it's fast (~300k/s).

When one of them talks to a linux box through ppp, it's tolerable (~1.5k/s on
a 14.4 line).

When one of them talks to the other *through* the linux box, it's horrid
(~3k/minute), and I get 10-15 second lags on telnet connections.

They're both okay to decent even talking to machines halfway across the Net.

Am I missing something obvious?

Also, when I'm telnetted from one to the other through linux, vi does
strange and mysterious things; it doesn't seem to successfully send
vt100 clear to end of lines... I can't figure out why.  ???

None of these problems occur telnetting to or from either system to
anything *else*.

I'm wondering if the machine that's ethernetted to the linux box is maybe
assuming that it's using ethernet, or something similar?  I don't know
how the TCP/IP stuff goes well enough to make coherent suggestions.

-s