This sets the destination IP address, paired with cdmipIpRouteDestMaskLen, that this route table entry matches traffic against. The MIB explicitly warns against using this to add multicast routes for Vipersat Multicast addresses, meaning this object is intended for regular unicast or multicast destination routing but must not be used for Vipersat's own internal multicast control traffic, which is presumably handled separately by the Vipersat networking logic itself. Setting this to 10.5.0.0 with a /16 mask would match all traffic destined for the 10.5.0.0/16 range and forward it according to this route's next-hop and interface settings.