>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?

It came up earlier that some systems don't deal very well with forwarding
packets that have some of the newer TCP options (like timestamps, for example).
If you want, go into /sys/netinet/tcp_subr.c, try changing tcp_do_rfc1323 to 0
and see if that helps any.

--Ken