A cdsgIfExtClassifierEntry extends a corresponding
dsgIfClassifierTable entry.
This entry provides additional information for a particular
ADSG classifier of the DSG-IF-MIB dsgIfClassifierEntry.
For example, the configuration of the fully qualified
domain name (FQDN) of ADSG classifier multicast group
and source addresses.
An entry in this table exists for each configured
ADSG classifier in DSG-IF-MIB dsgIfClassifierTable.