OpenView Network Node Manager: Designing and Implementing an Enterprise Solution

Traps From Expected and Unexpected Sources

SNMP traps are transmitted to UDP port 162 by default. Sources of SNMP traps include NNM and network devices. NNM generates traps internally (often loosely referred to as events) called enterprise-specific traps. NNM may also generate special SNMP traps in response to ovevent-programmed actions.

Network devices may have one or more trap destinations configured. Trap destinations are usually the IP addresses of network management stations. These IP addresses may be manually configured, or they may be configured automatically by the device’s element manager software running on the NNM system. Multiple trap destinations are desirable when two or more collection stations manage a device because it improves ...