Description: The Destination Port Bit Map = the set of ports to which the incoming packet is to be forwarded. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 0 through 7, the second octet specifying ports 8 through 15, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the switch is represented by a single bit within the value of this object. If that bit has a value of <1> then that port is included in the set of ports; the port is not included if its bit has a value of <0>. (Note that the setting of the bit corresponding to the port from which a frame is received is irrelevant). Port 0 means the SNMP agent. The default value of this object is a string of ones of appropriate length, except for the source port bit and the SNMP agent port(port 0). Modifing this fields is rellevant only for customFilter(2) type of entries. Deleting the filter for a specific source port means writing the default value - all 1's.