Topology change notification

Enabling topology change notification on a switch port and then connecting or disconnecting an LLDP-MED endpoint on that port causes the switch to send an SNMP trap to notify the designated management stations. The port number included in the trap corresponds to the internal number the switch maintains for the designated port, and not the port's external (slot/number) identity. To match the port's external slot/number to the internal port number appearing in an SNMP trap, use the walkmib ifDescr command, as shown in Matching internal port numbers to external slot/port numbers.

Matching internal port numbers to external slot/port numbers