SG13 IP work Y.17oam - OAM and protection switching for IP- based networks Y.1540 - IP packet transfer and availability performance parameters Y.1541 - IP performance objectives and allocations Y.1311 - IP VPN Y.1311.1 - IP VPN over MPLS Y.satip - Satellite IP networking architecture Y.123qos - IP access quality of service Y.ipbypass - IP bypass in access networks