MTU VLAN

I have 2 vlan i am bonding, in an mpls network, and i would like to increase my mtu from 1508 to 1600 on the bonding interface i cannot increase the mtu to 1600 as it also need the physical interface mtu increase, is this right way?

thanks,

Your vlan are encapsulated in mpls, and mpls will be encapsed in ethernet. So physical interface MTU must count mpls header, 802.1Q header and so on. Every next logical interface MTU after physical must be lower than previous, because previous carry on headers of following.