Junos OS

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  • 1.  Accessing a previous config

    Posted 02-18-2009 11:22

    hey all, is there a command to view a coniguration that was runnign on the router, say a week ago?


    i do not want to rollback. i just want to view the configuration.




  • 2.  RE: Accessing a previous config
    Best Answer

    Posted 02-18-2009 12:01

    List the rollback revisions:


    root@fenrir# rollback ?



    View a particular revision:

    root@fenrir> show system rollback x


    where x  is the revision you want to view



    Compare a revision to the current revision:


    root@fenrir# show | compare rollback x


    One could also use Subversion, etc to keep copies of the config files off-router as well.

  • 3.  RE: Accessing a previous config

    Posted 02-18-2009 12:10

    JUNOS software makes a copy of the running configuration, and keeps it in an archive of 50 previous configurations (default). The following commands to help you out ....


    jahil@R1> file list /var/db/config/ recursive

    jahil@R1> file list /config/ recursive


    You will get the output as shown below which is quite enough to identify whatever configuration you are looking for..


    -rw-r-----  1 root  wheel       2760 Feb 19 00:24 juniper.conf.10.gz
    -rw-r-----  1 root  wheel       2755 Feb 19 00:19 juniper.conf.11.gz
    -rw-r-----  1 root  wheel       2722 Feb 19 00:18 juniper.conf.12.gz
    -rw-r-----  1 root  wheel       2727 Feb 19 00:18 juniper.conf.13.gz
    -rw-r-----  1 root  wheel       2723 Feb 19 00:16 juniper.conf.14.gz
    -rw-r-----  1 root  wheel       2748 Feb 19 00:16 juniper.conf.15.gz

    JUNOS way to display file on your screen.


    jahil@R1> file show /var/db/config/juniper.conf.10.gz




    Message Edited by masoodnt10 on 02-19-2009 01:12 AM

  • 4.  RE: Accessing a previous config

    Posted 02-18-2009 13:42

    Adding to what others have already provided.  You can request arbitrary diffs between versions, with the following command in operational command mode (not edit).


     show system rollback compare <config1> <config2>


    Where <config1> and <config2> are the numbers output by "show system commit".  This can help you narrow down exactly when a particular change was made.