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Standby state definition in Master/Slave Mode A PW is considered to be in Standby state when: the PW labels are exchanged between its two endpoints in the control plane, and the status bits sent by the Master endpoint indicate the PW is in Standby state In this state the endpoints MUST NOT forward data traffic over the PW but MAY allow PW OAM packets, e.g., VCCV, to be sent and received in order to test the liveliness of standby PW |