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Ethernet topology for mixing different MTUs

Last Modified: 2012-06-27
Say I've got a small LAN.  Some devices use GigE NICs with Jumbo Frame support (i.e. 9000 byte MTU).  Others are Fast Ethernet, and thus support an MTU of only up to 1500 bytes.  What is the simplest network configuration that will let the machines with Gigabit NICs use Jumbo Frames to talk to each other, but still let all devices communicate?

I've read something about using a VLAN, for this.  Do I just buy a gigabit switch with VLAN support and Jumbo frame support and I'm done?  If so, what sort of scheme do I use for configuring it (e.g. put all 1500 byte MTU devices on one VLAN, and all 9000 byte MTU devices on another)?

All I'm looking for is a high-level explanation to point me in the right direction.  I can work out all the specifics, later.
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