Work with a basic hierarchy

You can create more than one Channel Selector object, but a basic configuration calls for a single Channel Selector object with child Device Selector objects representing individual devices. This typical configuration is common for the following reasons:

• Traps are received from the port specified in the Channel Selector settings, with port 162 as the default. To receive traps correctly, only one Channel Selector can be bound to the specified port. If multiple channel selectors share the same port, only one of them will receive traps.

• In real world applications, traps are sent to port 162 by default when using SNMP Windows Agents or devices (PLCs routers, printers etc. that support SNMP). You can specify any valid port, but in most cases when talking to real devices with SNMP, the port 162 is used. Hence, the default value for the TRAP port has been configured to 162.

  However, in some cases you can change the default trap port that the device or machine can send traps to.

• The same conditions, guidelines, and recommendations apply if you want to clone multiple instances of the SNMP Communication Driver on the same machine. Traps will function only in the first activated instance of any SNMP Communication Driver running on the same machine. Any subsequent instances of the SNMP server will not receive any trap packets.