The advertised admin forwarding status of active/standby reflects the status of the local Epipe SAP in BGP-MH instance. If the SAP is not part of an MC-LAG instance or a BGP-MH instance, the forwarding status of Active is always advertised.
When the SAP in endpoint X is part of a BGP-MH instance, a node must send T-LDP forwarding status bit of SAP active/standby over all Y endpoint spoke-SDPs, except the ICB spoke-SDP, whenever this (BGP-MH designated forwarder) status changes. The status bit sent over the ICB is always zero (Active by default).
When the SAP in endpoint X is not part of an MC-LAG instance or BGP-MH instance, then the forwarding status sent over all Y endpoint spoke-SDPs should always be set to zero (Active by default).
The received SAP active/standby status is saved and used for selecting the active transmit endpoint object Pseudowire Redundancy procedures.