Each row contains the mapping from an input DSCP value to
an output DSCP value. When the entry for csqDscpMutationMapName
in the csqDscpMutationTable is created, corresponding entries
in this table are initialized with a default mapping which is
the identity function. When the entry for
csqDscpMutationMapName in the csqDscpMutationTable is removed,
corresponding entries in this table will also be deleted.