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Juniper Useful Commands

In Juniper you have the concept of active and candidate configurations. Active configuration is the current committed configuration of a device. Candidate configuration is a working copy of the configuration that allows users to make configurational changes without causing any operational changes until this copy is committed. Rollback allows you to return to a previously committed configuration. Rollback #0 (Active configuration) Rollback #1 (Prior active config) Rollback #2 (Prior 2 commit config) Rescue is the well-known configuration that recovers a device from a configuration that denies management access. You set a current committed configuration to be the rescue configuration through the CLI. request system configuration rescue save Commit commit check verify that the candidate configuration is syntactically correct, but do not commit the changes. comment "comment-string: Include a comment describing changes to the committed configuration. Enclose the comment in quotation marks and include it on a single line. To view commit comments, issue the show system commit operational mode command. synchronize Synchronize the commit on both Routing Engines. The Routing Engine on which you execute this command copies and loads its candidate configuration to the other Routing Engine. Both Routing Engines perform a syntax check on the candidate configuration file. If no errors are found, the configuration is activated and becomes the current operational configuration on both Routing Engines. confirm clear system commit show system commit Show | compare Show configuration | compare rollback 2 Show system users (show users login into the switch)