netplan не изменяет mtu

network:
    ethernets:
        ens3:
            mtu: 9000
            addresses:
            - 198.18.12.15/24
            - 2a01:d0:c353:183::15/64
            dhcp4: false
            gateway4: 198.18.12.1
            gateway6: 2a01:d0:c353:183::1
            nameservers:
                addresses:
                - 198.18.12.3
                - 2a01:d0:c353:183::3
                search: []
    version: 2