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Hierarchy Level


Define a unique identifier for an SNMPv3 engine by configuring the suffix of the engine ID. The engine ID is used for identification only and not for addressing. There are two parts of an engine ID: the prefix and the suffix. The prefix is formatted according to the specifications defined in RFC 3411, An Architecture for Describing Simple Network Management Protocol (SNMP) Management Frameworks and cannot be configured. The suffix is configured here.


SNMPv3 authentication and encryption keys are generated based on the associated user passwords and the engine ID. If you configure or change the engine ID, you must commit the user passwords and new engine ID before you configure SNMPv3 users, or the authentication will fail.

By default the use-mac-address option is enabled. This causes the engine ID suffix to be based on a MAC address.

Starting with Junos OS release 14.1X53-D43, QFX Series switches use the chassis MAC address for the engine ID suffix. On OCX Series, the MAC address of the management interface continues to be used.

You can override the default behavior by using the local engine-id-suffix option, or by using the use-default-ip-address option.




local engine-id-suffix

The engine ID suffix is set based on the data entered.


The engine ID suffix is generated from the default IP address.


The engine ID suffix is generated from the MAC address of the management interface on the switch.

Required Privilege Level

snmp—To view this statement in the configuration.

snmp-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 11.1.