Dell PowerConnect 7048P User Manual - Page 335

Configuring SNMP (CLI) This section provides information about the commands you use to manage and view SNMP features on the switch. For more information about these commands, see the PowerConnect 7000 Series CLI Reference Guide. Configuring the SNMPv3 Engine ID To use SNMPv3, the switch must have engine ID. You can specify your own ID or use the default string that is generated using the MAC address of the switch. If the SNMPv3 engine ID is deleted, or if the configuration file is erased, then SNMPv3 cannot be used. Since the EngineID should be unique within an administrative domain, the following guidelines are recommended: • For standalone switches use the default keyword to configure the Engine ID. • For a stack of switches, configure your own EngineID, and verify that is unique within your administrative domain. Changing the value of SNMP EngineID has important side-effects. A user's password (entered on the command line) is converted to an MD5 or SHA security digest. This digest is based on both the password and the local engine ID. The command line password is then destroyed, as required by RFC 2274. Because of this deletion, if the local value of engineID changes, the security digests of SNMPv3 users will be invalid, and the users will have to be reconfigured. Beginning in Privileged EXEC mode, use the following commands to configure an engine ID for SNMP. Command Purpose configure Enter Global Configuration mode snmp-server engineID local {engineid-string | default} Configure the SNMPv3 Engine ID. • engineid-string - The character string that identifies the engine ID. The engine ID is a concatenated hexadecimal string. Each byte in hexadecimal character strings is two hexadecimal digits. Each byte can be separated by a period or colon. (Range: 6-32 characters) • default - The engineID is created automatically, based on the device MAC address. Configuring SNMP 335