The MaintenanceDomain table. Each row in the table represents a different maintenance domain. A Maintenace domain is described in 802.1ag (3.22) as the network or the part of the network for which faults in connectivity are to be managed, belonging to a single administration. The boundary of a Maintenance Domain is defined by a set DSAPs, each of which may become a point of connectivity to a Service Instance. The index of this table is hwCfmMaintenanceDomainIndex. Need bond hwCfmMaintenanceDomainIndex,hwCfmMaintenanceDomainNameFormat, hwCfmMaintenanceDomainName,hwCfmMaintenanceDomainLevel and hwCfmMaintenanceDomainRowStatus when create MD. Need bond hwCfmMaintenanceDomainIndex and hwCfmMaintenanceDomainRowStatus when delete MD.