Addressing ECMP Loadsharing IP PW Packets need to follow the same path with PW OAM ones OAM Packets directed based on Labels and I/f Disambiguate the PW packets from an IP flow by using a CW CW’s 0000 instead of IPv4 VC Label Control Word Tunnel Label OAM Payload VCCV Ping, BFD Local Header PPP DLL Protocol Number | reserved | 0 0 0 1 4 Bytes (OAM) PID VC Label Control Word Tunnel Label Native Service (IP) Payload Local Header Sequence | Length | FRG | Flags | 0 0 0 0 4 Bytes CW MUST use CW to avoid that OAM and PW IP payload take different path |