Description: This object contains an unused value for a PM session number on a MEP that can be used for either LM or DM sessions, or a zero to indicate that none exist. This value needs to be read in order to find an available index for row-creation of a PM session on a MEP and then used when a row is created. This value is automatically updated by the SNMP Agent after the row is created.

Referential integrity is necessary, i.e., the index needs to be persistent upon a reboot or restart of a device. The index is never to be reused for other PM sessions on the same MEP while this session is active, or until it wraps to zero. The index value keeps increasing up to that time. This is to facilitate access control based on a fixed index for an EMS, since the index is not reused.

This object is an extension of the dot1agCfmMepTable and the object is automatically added or deleted based upon row creation and destruction of the dot1agCfmMepTable.