Re: different MTU on different VLAN's

On 01/10/2012, at 13:22, James Harper <james.harper@bendigoit.com.au> wrote:

It makes perfect sense. Think of the physical interface as being separate from the eth0 interface, so eth0 is just another vlan:

Physical interface MTU = 9000 (>= largest VLAN MTU) eth0 (vlan1, untagged) MTU = 1500 eth0.12 (vlan12, tagged) MTU = 9000

you could create a eth0.1 vlan iface with 1500 MTU and hope the switch treats it the same as untagged frames. most switches should do this, though I've never tested it