Backing up your network with RANCID
RANCID, which its developers say is released under a BSD-like license, will check your network device configurations and back them up if changes have been made. It keeps a history of changes using either Concurrent Version System (CVS) or Subversion. RANCID is written in Perl and Expect. It supports Cisco routers, switches, and firewalls, Juniper routers, Foundry switches, Redback network-attached storage, Alteon and Hewlett-Packard ProCurve switches, and other devices. RANCID is a useful tool not only for backing up device configs, but also for troubleshooting network problems, because it lets you determine what changes were made since the last revision.
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