Ethernet speed.

[Steve Bui]

Our users complain that connection to our linux lpar is slow,
and they want to know our ethernet speed.  Our datacom says
that our connection speed to the switch is 100Mb, but I can't
find any command that display the ethernet connection speed in
linux.  Does anyone know how to find it in SuSE linux 8.0
(kernel 2.4.19)?  Thanks.