For any SNMP Trap-generating network devices not residing on the same subnet as the network management station, the default Subnet Mask utilized on that device must be altered to match the subnet scheme. In the above example, the default Subnet Mask is modified from
255.255. 255. 0 to 255. 255. 255. 240. For each SNMP Trap-generating device with a modified Subnet Mask, a Default Gateway is assigned. In the event that any of the custom-masked devices generated an SNMP Trap for the network management station, a comparison of the Subnet Mask and the Network ID indicates that the SNMP Trap should be sent to that subnet’s Default Gateway to be routed to the subnet where the network management station resides. The procedures for modifying the Subnet Mask and configuring the Default Gateway through Local Management may be found in Chapter 7 of this User’s Guide, which deals with the Configuration Screen.
