You can poll the status of each Ethernet interface via SNMP requests. The details of the OIDs corresponding to the Ethernet interfaces are given below:
 

EDR-903 Series

The EDR-903 MIB contains seven IfOperStatus OIDs. You can check the port status using the read-only OIDs IfOperStatus.5 to IfOperStatus.7 (1.3.6.1.2.1.2.2.1.8.5 to .1.3.6.1.2.1.2.2.1.8.7) as follows:

• IfOperStatus.5 = LAN port
• IfOperStatus.6 = WAN2 port
• IfOperStatus.7 = WAN1 port

The values indicate the following status:

• Value 1 = up
• Value 2 = downThe the IfOperStatus for the OD is 1 or “up”, it means that the PC is connected to the LAN RJ45 port and the port is enabled.

  EDR-G902 Series

  For the EDR-G902, you can check the OIDs IfOperStatus.5 to IfOperStatus.6 (1.3.6.1.2.1.2.2.1.8.5 to .1.3.6.1.2.1.2.2.1.8.7) as follows:

• IfOperStatus.5 = LAN port
• IfOperStatus.6 = WAN port

Monitoring Updates to the IfOperStatus Values

A network management software (NMS) can be used to periodically get updates on the status of a switch. The periodicity varies for each NMS; it is 60 secs in the case of MXview. To continuously monitor the status of network devices, enable the SNMP trap service.