The value of tmnxGsmpGrpNbrPrioMarkType specifies the priority
remarking type to be used.
If 'dscp' is specified the dcsp code-point to be used is
specified by the object tmnxGsmpGrpNbrPrioMarkDscp.
If 'prec' is specified, the precedence value to be used is specified
by the object tmnxGsmpGrpNbrPrioMarkPrec.