This document provides information about using X.509 digital certificates issued by a Cisco IOS CA
server to authenticate VPN tunnels between Cisco routers. It provides design considerations,
step-by-step configuration instructions, and basic management options for VPN crypto devices using
X.509 digital certificates. This document is written for Cisco system engineers and assumes that you
have a working knowledge of Cisco IOS routers, as well as a basic understanding of IPSec,
ISAKMP/IKE, and X.509 digital certificates....