SNMP trap receivers

Use the snmp-server host command to configure a trap receiver that can receive SNMPv1 and SNMPv2c traps, and (optionally) Event Log messages. When you configure a trap receiver, you specify its community membership, management station IP address, and (optionally) the type of Event Log messages to be sent.

If you specify a community name that does not exist—that is, has not yet been configured on the switch—the switch still accepts the trap receiver assignment. However, no traps are sent to that trap receiver until the community to which it belongs has been configured on the switch.

To replace one community name with another for the same IP address, you must first enter the

no snmp-server host <community-name> {< ipv4-address | ipv6-address >}
command to delete the unwanted community name. Otherwise, if you add a new community name with an IP address that is already used with a different community name, two valid community name entries are created for the same management station.

If you do not specify the event level ([none|all|not-info|critical|debug]), the switch does not send Event Log messages as traps. However, "well-known" traps and threshold traps (if configured) are still sent.