Network Device Configuration Management

by Anshuman Kanwar, Sys Admin Magazine

Your most elaborate disaster recovery plans are only as good as your backups. In the context of routers (and most firewalls), all configuration is normally stored as a plain-text file in flash memory or some sort of NVRAM. Creating a replica of a router in case of catastrophic failure is simply a matter of physically plugging in a cold standby and copying the configuration from some backup medium onto the new device.

Rancid (Really Awesome New CIsco config Differ) is a tool that automates the process of backing up device configuration. In this article, I will discuss how to install and maintain rancid and also explore the benefits that result from having a working, up-to-date rancid repository. More (offsite link)…