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Presentation on theme: "These materials are licensed under the Creative Commons Attribution-Noncommercial 3.0 Unported license (http://creativecommons.org/licenses/by-nc/3.0/)"— Presentation transcript:

1 These materials are licensed under the Creative Commons Attribution-Noncommercial 3.0 Unported license (http://creativecommons.org/licenses/by-nc/3.0/) as part of the ICANN, ISOC and NSRC Registry Operations Curriculum. Configuration Management RANCID Guatemala 2010

2 What is RANCID? The ”Really Awesome New Cisco config Differ” – Really! A configuration management tool: Keeps track of changes in the configs of your network equipment (Cisco, HP, Juniper, Foundry, etc.) Works on routers and switches

3 What is RANCID ? Automates retrieval of the configurations and archives them Functions as: Backup tool - ”woops, my router burned” Audit tool - ”how did this error get in?” Blame allocation :) - ”who did it?” The data is stored in a VCS (Version Control System) – supported are: CVS (Concurrent Versions Systems) SVN (SubVersioN) What is RANCID?

4 How does it work ? Run (manually or automated) Lookup list of groups For each device in each list of groups Connect to the equipment (telnet, ssh, …) Run ”show” commands – config, inventory,... Collect, filter/format data Retrieve the resulting config files CVS check-in the changes Generate a diff from the previous version E-mail the diff to a mail address (individual or group) How does it work?

5 What to use it for Track changes in the equipment configuration Track changes in the hardware (S/N, modules) Track version changes in the OS (IOS, CatOS versions) Find out what your colleagues have done without telling you! Recover from accidental configuration errors (anyone have stories?) What to use it for?

6 Post processing Run traditional filtering commands on your configs (grep, sed, for information) Re-use the automated login tools to build your own batch tools or do interactive login On large configurations, you can parallelize operations Post processing

7 Automated checks (verify configs for strange/inconsistent setup) Generate DNS file from equipment list Use IP address adjacency to produce a graph of your network Other applications

8 RANCID Project Home Page http://www.shrubbery.net/rancid/ Subversion (SVN) Home Page http://subversion.apache.org/ Good, Short RANCID Presentation http://www.shrubbery.net/rancid/NANOG29/ RANCID HowTo’s 1.http://www.linuxhomenetworking.com/wiki/index.php/Quick_ HOWTO_:_Ch1_:_Network_Backups_With_Rancid 2.http://gentoo-wiki.com/HOWTO_Rancid 3.http://homepage.mac.com/duling/halfdozen/RANCID- Howto.html References

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