RFC 2338 
This memo defines the Virtual Router Redundancy Protocol.

RFC 2787 
RFC Definitions of Managed Objects for the Virtual Router Redundancy Protocol.

Configuring VRRP With a Cisco VPN 3000 Series Concentrator
VRRP eliminates the single point of failure inherent in the static default routed environment.

PracticallyNetworked.com
PracticallyNetworked.com provides easy-to-understand help for small-network builders. The site contains how-to information for setting up and debugging home-office and small-business networks. Users can also find extensive troubleshooting information, tips on getting applications to work through firewalls, product reviews on network hardware and software, and more.