Introduction to Availability
Chris Carthern, William Julius Wilson, Richard Bedwell, Noel Rivera · Apress eBooks · 2015
This chapter discusses how to provide a high availability of systems, including network redundancy and fault tolerance. It covers protocols such as Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), and Gateway Load Balancing Protocol (GLBP) to increase network uptime. High availability is a requirement that companies use to keep mission-critical networks and applications available. Imagine if Amazon or Google had a four-hour outage. How much money would these companies lose because of this outage? Possibly millions of dollars. Thus you see the importance of high availability.