JunOS - Committing and Rolling-back

One can apply a configuration using a rollback timer as per the below example, which commits with an automatic rollback timer of 1 minute unless the second "commit" statement is entered:

$ ssh r1
user@r1> monitor start messages 
user@r1> configure
user@r1# load set test-config
user@r1# show | compare
user@r1# commit check
user@r1# commit confirmed 1 comment "commit with 1 minute rollback timer"
user@r1# commit
user@r1# exit
user@r1> monitor stop messages 
user@r1> exit

The pending config can be rolled back sooner if needed by using "rollback 1":

user@r1# commit check
user@r1# commit confirmed 1 comment "commit with 1 minute rollback timer"
user@r1# rollback 1
user@r1# commit

One can view rollbacks using "show system rollback":

# This shows what was added 2 commits ago, when compared to the current running config:
user@r1> show system rollback 0 compare 2    
[edit groups LAB-CONFIG system login]
+     user labuser {
+         uid 10;
+     }

# This shows what would be removed from the running config, by rolling back 2 commits:
user@r1> show system rollback 2 compare 0        
[edit groups LAB-CONFIG system login]
-     user labuser {
-         uid 10;
-     }

# This produces the same output as: 
user@r1> configure 
Entering configuration mode

{master}[edit]
user@r1# rollback 2 
load complete

{master}[edit]
user@r1# show | compare 
[edit groups LAB-CONFIG system login]
-     user labuser {
-         uid 10;
-     }

{master}[edit]
user@r1# rollback 0 
load complete

{master}[edit]
user@br1# exit 
Exiting configuration mode

 

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