A string of three bits corresponding to the OAM
Configuration field (see Table 57-7) in the most recently
received Information OAMPDU. The first bit corresponds to
the OAM Mode bit in the OAM Configuration field. The
second bit corresponds to the Unidirectional Support bit
in the OAM Configuration field. The third bit corresponds
to the Loopback Support bit in the OAM Configuration
field.
This value is updated on reception of a valid frame, with
(1) destinationField equal to the reserved multicast
address for Slow_Protocols specified in CROSS REF Table
43B-1, (2) lengthOrType field value equal to the reserved
Type for Slow_Protocols as specified in CROSS REF Table
43B-2, (3) a Slow_Protocols subtype value equal to the
subtype reserved for OAM as specified in Table 43B-3, (4)
the OAM code equals the OAM Information code.