On Tue, 1 May 2007, Bob wrote:

I tried to look this up with google, but didn't find any sensible answers.
I.e. I'm building a gigabit network at home, and I now have an 100Base-TX
network here. I would like to add a gigabit network to it. This gigabit
network will ofcourse run with jumbo frames. Now my question is basically,
can I plug an em and a fxp network cards into a machine and configure it to
run with brconfig? Will the bridge fragment oversized packets from the
gigabit network when talking to the 100Base-TX network? I'm running ofcourse
OpenBSD 4.1-current on the machine that acts as a bridge.

This is not possible. The bridge just takes a paket from one interface and puts it on the other interface(s). So jumbo frames are no option if a 100Base-TX network is connected.

You could route between the two networks, then the router would fragment the pakets if they are too large.

Greetings
  Markus

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