[Bridge] MTU Question

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> I have a bridge that has gigabit interfaces. The machine in question has
> the
> fun job of being a Bridge, Firewall and SMB server. Both of the Gigabit
> interfaces are connected to workstations directly via Xover cable (well
> MDI-X to be exact). My question is, if I enable jumbo frames on the
> gigabit
> interfaces will that make any difference in overall transfer rate of the
> bridge? I was thinking it might because even though the NIC is enslaved,
> it
> IS the device that the workstations communicate to. But also it might not
> because when applications talk to the network they're using BR(n) at
> 1500bytes.. can a bridging guru shed some light on this for me?
>
> -Thank you in advance
> Chris

The bridge does not care about frame size at all. It should be able
to handle large frames, provided:
* all interfaces in the bridge can handle the same big mtu, there is
  no way a bridge can fragment.
* also, the mtu of the bridge itself will always appear as 1500, but
  you could change that with ifconfig.  Thought about having bridge mtu
  appear as min(ports mtu), but don't think that is in the current version.




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