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Thread: HOW TO: Automating Cisco Router, Switch, and Firewall backups

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  1. #1
    Join Date
    Jun 2005
    Albuquerque, New Mexico
    Ubuntu Development Release
    HOW TO: Automating Cisco Router, Switch, Firewall backups.

    Step 1: Download and install rancid.

    For additional information on rancid's complete functionality see the following site.

    Install rancid, build-essential, and expect.

    sudo apt-get install rancid-core rancid-util build-essential expect
    Step 2: Create .cloginrc file in the rancid directory.

    Opend a terminal and type the following.

    sudo gedit /var/lib/rancid/.cloginrc
    Add entries for each router, switch, pix firewall you'd like to backup by using the following format.

    add password    IPADDRESS       {telnetpassword}      {enablepassword}
    IPADDRESS = the actual ip address of the device you want to backup.
    telnetpassword = the actual telnet password for the device you want to backup.
    enablepassword = the actual enable password for the device you want to backup.

    The "{}" are required. At the bottom of the .clogin add the following line if you require SSH access to your equipment.

    add method     *    telnet ssh
    With this clogin will first try to telnet then ssh to your equipment.

    Step 3: Protect the .cloginrc file.

    sudo chmod 640 /var/lib/rancid/.cloginrc
    Step 4: Create a backup directory for backup configs.

    sudo mkdir /var/lib/rancid/backups/

    Step 5: Change ownership of the /usr/lib/rancid/backups/ directory.

    sudo chown -R rancid.rancid /var/lib/rancid/backups/

    Step 6: Change permissions to the rancid directory.

    sudo chmod 770 /var/lib/rancid/
    Step 7: Set password for rancid account

    sudo passwd rancid
    Step 8: Test .cloginrc

    As the user rancid test accessing your equipment.

    su rancid
    Now using once of the network devices that you've put in the .cloginrc for rancid type the following in the open terminal.

    /usr/lib/rancid/bin/clogin  IPADDESSOFDEVICE
    You should see the clogin telnet (or ssh) to the device in question and switch to enable mode on the device. If everything works the proceed on to step 8. Otherwise take a look at your /var/lib/rancid/.cloginrc .

    Step 9: Test grabing a backup config from the same device.


    As rancid run the following test to make sure that you have everything setup correctly.

    /usr/lib/rancid/bin/clogin  -c 'write term' IPADDESSOFDEVICE > /var/lib/rancid/backups/test.cfg

    Verify the output:

    less /var/lib/rancid/backups/test.cfg

    If everthing checks out move on to step 10.

    Step 10: Create the bash script for the backups

    Here's a sample script for you to copy and paste into a file (i.e. and to tweak, add, or change for your needs. But save the script somewhere the rancid user can access and execute the script from (i.e./var/lib/rancid/). If you are planning on backing up a various types of routers, switches, firewalls etc you may want to create serveral differnet scripts.

    # Variables 
    tdy=`date +%m%d%Y` 
    #backup network device 
    $clogin -c 'write term' > $path/foo-$tdy.cfg
    NOTE: When rancid is installed the default shell for the rancid user is csh. So for the script above to work the "#!/bin/bash' is needed.

    Step 11: Make the script executable to rancid.

    sudo chmod 700 /path/to/script

    Step 12: Test the backup script.

    Test your script logged in as rancid.

    su rancid

    Now from wherever you put the backup script verify that it works before adding it as a cron job. For this example I'm going to use the following location /var/lib/rancid/.scripts/ with the output path being /var/lib/rancid/backups/.

    verify the config file that was generated to the output path you specified.

    less /var/lib/rancid/backups/foo-12202005.cfg

    Step 13: Add script to CRON.

    As rancid add your script to CRONTAB.
    su rancid
    Now add an entry for your script.

    crontab -e
    To backup your equipment every Friday at 5pm should look like...

    0 17 * * 5 /var/lib/rancid/.scripts/ >/dev/null 2>&1

    Save the entry (crtl+x).

    Verify the entry in crontab is correct.

    crontab -l
    For more infor on CRONTAB see the following post.

    You're all set... enjoy!
    Last edited by GrammatonCleric; January 15th, 2006 at 01:31 AM.
    "Nice jail. Looks strong."
    - H. Houdini


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