Setting up a threshold alert based on bytes sent/received on specific port on a switch.

Define the event by following these steps:

1. right click on the node, select Alerting-->Edit Node Alerting Policy (note: switch needs to be SNMP enabled)
2. click 'Add' button to add an event
3. from 'SNMP' tab select 'SNMP Performance Threshold'
4. type in a Description or a general name for the event
5. to select counter, click on blue text: 'performance counter'
6. from the 'Performance object' pull down menu, select 'Interfaces'
7. in the left hand list select 'bytes sent' or 'bytes received'
8. in the right hand list under "Select instance from list", select port (example: RMON PORT 3 on UNIT 2)
9. set acceptable value (for example 1000000 bytes) 10 click 'OK' twice
10. now double click on the event you've just defined, to add an action

You've just defined the Event -- now create the alert or action, to see the remainder of the steps see related article: Configuring an Alert or Configuring an Action