Each port contained in the chassis (that is known to the LLDP agent) is uniquely identified by a port number. A port number has no mandatory relationship to an InterfaceIndex object (of the interfaces MIB, IETF RFC 2863). If the LLDP agent is a IEEE 802.1D, IEEE 802.1Q bridge, the LldpPortNumber will have the same value as the dot1dBasePort object (defined in IETF RFC 1493) associated corresponding bridge port. If the system hosting LLDP agent is not an IEEE 802.1D or an IEEE 802.1Q bridge, the LldpPortNumber will have the same value as the corresponding interface's InterfaceIndex object. Port numbers should be in the range of 1 and 4096 since a particular port is also represented by the corresponding port number bit in LldpPortList.