Question

An engineer configures SNMPv3 informs to be sent from a router to an NMS at 10.1.1.50. Polling with the same SNMPv3 user works correctly, but the NMS never receives any inform notifications. The relevant configuration is: 'snmp-server group ADMIN v3 priv', 'snmp-server user NETMON ADMIN v3 auth sha AuthPass1 priv aes 128 PrivPass1', 'snmp-server host 10.1.1.50 informs version 3 priv NETMON', and 'snmp-server enable traps'. What is the most likely cause of the missing informs?

Accepted Answer

The remote engine ID of the NMS has not been configured, so the router cannot authenticate the inform with the receiver's engine ID

Answer

Informs require the group to be configured with the 'notify' view before any notifications can be generated

Answer

The 'snmp-server host' command must specify 'traps' instead of 'informs' when using SNMPv3 priv

Answer

AES 128 encryption is not supported for SNMPv3 informs and must be downgraded to DES