SNMP Command Reference
Page 174 7705 SAR OS System Management Guide
SNMP System Commands
snmp
Syntax snmp
Context config>system
Description This command creates the context to configure SNMP parameters.
engineID
Syntax [no] engineID engine-id
Context config>system>snmp
Description This command sets the SNMP engine ID to uniquely identify the SNMPv3 node. By default, the
engine ID is generated using information from the system backplane.
If the SNMP engine ID is changed in the config>system>snmp>engineID engine-id context, the
current configuration must be saved and a reboot must be executed. If the configuration is not saved
and the system is not rebooted, the previously configured SNMP communities and logger trap-
destination notify communities will not be valid for the new engine ID.
This command could be used, for example, when a chassis is replaced. Use the engine ID of the first
system and configure it in the new system to preserve SNMPv3 security keys. This allows
management stations to use their existing authentication keys for the new system.
Ensure that the engine IDs are not used on multiple systems. A management domain can only have
one instance of each engine ID.
The no form of the command reverts to the default setting.
Default The engine ID is system-generated.
Parameters engine-id — an identifier from 10 to 64 hexadecimal digits (5 to 32 octet number), uniquely
identifying this SNMPv3 node. This string is used to access this node from a remote host with
SNMPv3.
Caution: In conformance with IETF standard RFC 2274, User-based Security Model
(USM) for version 3 of the Simple Network Management Protocol (SNMPv3),
hashing algorithms that generate SNMPv3 MD5 or SHA security digest keys use the
engine ID. Changing the SNMP engine ID invalidates all SNMPv3 MD5 and SHA
security digest keys and may render the node unmanageable. If the SNMP engine
ID is changed, the SNMP hash keys must be reconfigured.
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