The operational multicast IP address for this CASA
Entity. This is used to listen for Wildcard Affinities
in the case of a Forwarding Agent, or for sending
Wildcard Affinities in the case of a Service Manager.
When cCasaState is set to casaEnabled, this object
attains the value contained in
cCasaCfgMcastAddress.
A get on this object when cCasaState is casaNotEnabled
returns a noSuchObject exception.