This object is used to add and delete an entry.
When an entry of the table is created, the following
objects are mandatory:
cmgwIpConfigIfIndex
cmgwIpConfigVpi
cmgwIpConfigVci
cmgwIpConfigAddress
cmgwIpConfigSubnetMask
These objects can not be modified after the value of this
object is set to 'active'.
Modification can only be done by deleting and re-adding the
entry again.
After the system verify the validity of the data, it
will set the cmgwIpConfigRowStatus to 'active'.