Defines a table for storing the results of an OAM 'macQuery'
probe operation where a L2 mapping TLV is returned. Only one
downstream and one upstream L2 mapping entry is returned if the
'macQuery' replier has no egress mapping for the requested MAC
address but it does have an SDP binding. Multiple downstream L2
mappings that specify the replier's flooding domain may be returned
if the replier has no bindings for the MAC address.
An entry in this table is created when the result of an OAM
'macQuery'probe is determined.
An entry is removed from this table when its corresponding
tmnxOamPingCtlEntry is deleted.