This object specifies the maintenance domain name
to be used by the Auto-Ethernet-CFM operation.
The Auto-Ethernet-CFM operation discovers all the MEPs
participating in the VLAN specified by ipslaEthernetGrpCtrlVLAN
within this maintenance domain and create IP SLA operations
for each MEP corresponding to value specified in
ipslaEthernetGrpCtrlRttType.
As long as the value of this object is specified, the value of
ipslaEthernetGrpCtrlDomainNameType must be set to 'charString'.