The MAC address of the peer OAM entity. The MAC address is
derived from the most recently received OAMPDU. This value is
initialized to all zeros (0x000000000000). This value is
invalid if the h3cDot3OamPeerStatus is inactive.
An OAMPDU is indicated by a valid frame with (1) destination
MAC address equal to that of the reserved MAC address for Slow
Protocols (See 43B of [802.3ah]), (2) a lengthOrType field
equal to the reserved type for Slow Protocols, (3) and a Slow
Protocols subtype equal to that of the subtype reserved for
OAM.