This read-only value reports the UDP port the SNMPv1/v2 manager is listening on for forwarded traps from this proxy agent, the companion setting to v1v2ManagerHost that completes the destination address for trap forwarding. An administrator checks this alongside v1v2ManagerHost to fully confirm where traps are being sent, since a mismatched port would mean traps are sent to the right host but never actually received by the manager's listening process. With the default value of 162, the standard SNMP trap port, traps are forwarded there unless this has been reconfigured to match a manager listening on a non-standard port.