I was talking to someone yesterday about some testing that I've been doing with between a pair of computers with Intel GigE NICs. I've been doing some of my testing with a cross-over cable and some other testing going through a GigE switch.
Re. the cross-over cable connection, he said that the NICs may not be able to negotiate Jumbo Frames when they're connected with a cross-over cable, i.e., they needed to be talking to a GigE switch.
Is this true? I haven't heard this before.
Also, re. the GigE switch: In general, assuming that the GigE switch can support Jumbo Frames, do GigE switches need to be configured specifically to enable support for Jumbo Frames? Or, is this usually automatically detected/enabled by the switch(es)?