After studying this chapter you should be able to: Understand high availability, implement high availability, describe high availability monitoring options, describe switch supervisor redundancy, describe gateway redundancy protocols, configure and verity Cisco IOS server load balancing. | Chapter 5: Implementing High Availability and Redundancy in a Campus Network CCNP SWITCH: Implementing IP Switching 1 Cisco Networking Academy Program CCNP SWITCH: Implementing IP Switching Chapter 5: Implementing High Availability and Redundancy in a Campus Network Chapter 5 Objectives Understand high availability. Implement high availability. Describe high availability monitoring options. Describe switch supervisor redundancy. Describe gateway redundancy protocols. Configure and verity Cisco IOS server load balancing. 2 Chapter 5 Objectives Understanding High Availability A network with high availability provides an alternative means that enables constant access to all infrastructure paths and key servers. High availability is not just about adding redundant devices. It implies planning to understand where the points of failure occur and designing the network so that an alternative solution exists to compensate for the loss of these points of failure. This chapters provides an . | Chapter 5: Implementing High Availability and Redundancy in a Campus Network CCNP SWITCH: Implementing IP Switching 1 Cisco Networking Academy Program CCNP SWITCH: Implementing IP Switching Chapter 5: Implementing High Availability and Redundancy in a Campus Network Chapter 5 Objectives Understand high availability. Implement high availability. Describe high availability monitoring options. Describe switch supervisor redundancy. Describe gateway redundancy protocols. Configure and verity Cisco IOS server load balancing. 2 Chapter 5 Objectives Understanding High Availability A network with high availability provides an alternative means that enables constant access to all infrastructure paths and key servers. High availability is not just about adding redundant devices. It implies planning to understand where the points of failure occur and designing the network so that an alternative solution exists to compensate for the loss of these points of failure. This chapters provides an overview on how to implement a high-availability solution according to a given network design and requirements. This includes building a resilient network with optimal redundancy for high availability. Monitoring the network using SNMP, Syslog, and IP SLA are key elements to ensure the high availability of the network. This chapter also covers supervisor redundancy options such as RPR, RPR+, SSO, and NSF. For ensuring first hop gateway redundancy, the Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP) and Gateway Load Balancing Protocol (GLBP) are needed. First hop redundancy protocols (FHRP) allow for nondisruptive failover between available redundant gateways. HSRP/VRRP allow for one primary router per subnet with other routers acting as standby/backup. GLBP allows load balancing across multiple gateways for the same subnet. The first hop redundancy protocols are explained in detail in this chapter. High availability is technology that enables networkwide .
