This object is used to add and delete an entry.
When an entry is created, the following objects
are mandatory:
cmgwConfigDomainName
cmgwConfigDomainNameEntity
When deleting domain name of DNS name server
(cmgwConfigDomainNameEntity is dnsServer (2)), the
cMediaGwDnsIpConfigTable should be empty.
Adding/deleting entry with cmgwConfigDomainNameEntity
of 'mgc' will cause adding/deleting entry in
cMgcConfigTable (CISCO-MGC-MIB) automatically.
The cmgwConfigDomainName and cmgwConfigDomainNameEntity
can not be modified if the value of this object is
'active'.