interfaces {
    ge-2/0/0 {
        flexible-vlan-tagging;
        encapsulation flexible-ethernet-services;
        unit 1100 {
            encapsulation vlan-vpls;
            vlan-tags outer 100 inner 1100;
            family vpls;
        }
        unit 1101 {
            encapsulation vlan-vpls;
            vlan-tags outer 100 inner 1101;
            family vpls;
        }
    }