Description: Indicate the mask to be logical-ANDed with the destination address before being compared to the value in the cIpForwardDest field. For those systems that do not support arbitrary subnet masks, an agent constructs the value of the cIpForwardMask by reference to the IP Address Class.

Any assignment (implicit or otherwise) of an instance of this object to a value x must be rejected if the bitwise logical-AND of x with the value of the corresponding instance of the cIpForwardDest object is not equal to cIpForwardDest.