Re: Jumbo frames between vlans

Hi Henderson

You have the set the max MTU value globally using the below mentioned command, this command will apply for all VLANs and then if required change the MTU for other VLANs.

If Global MTU size is less than the individual interface VLAN MTU size, you will get error while committing stating " Family MTU is too large relative to device MTU"

root@CE1# set interfaces vlan mtu 9216 --> To set the max MTU value globally
root@CE1# show interfaces vlan
mtu 9216; --> This applies for all VLANs
unit 10 {
family inet {
address 10.10.10.1/24 {
arp 10.10.10.2 mac 00:1f:12:37:65:41;
}
}
}
unit 20 {
family inet {
address 20.20.20.1/24;
}
}
unit 30 {
family inet {
mtu 2000; --> VLAN interface specific MTU, This should be less than Global MTU value
address 30.30.30.1/24;
}
}
unit 100 {
family inet {
mtu 3000;
}
}

{master:0}[edit]
root@CE1#



Thanks
Arul