This document describes the Simple Network Management Protocol (SNMP) trap to monitor Enhanced Interior Gateway Routing Protocol (EIGRP) adjacency change in Nexus 7000. The Nexus only supports two traps for EIGRP-MIB, cEigrpAuthFailureEvent and cEigrpRouteStuckInActive, but no SNMP traps for EIGRP neighbors up/down (cEigrpNbrDownEvent).
A viable workaround to generate SNMP traps to monitor EIGRP adjacency changes would be to configure two EEM scripts - one for Neighbor Up and one for Neighbor Down - triggered based on the syslog pattern.
Note: Pre NX-OS 7.x does not give us the option to configure snmp-server enable traps syslog which will in turn allow you to monitor the entire logging log itself then filter for the EIGRP messages. This feature was added in releases, 7.x and later.