Businesses and consumers that rely on intranet and Internet services for their mission-critical communications require and expect their networks and applications to be continuously available to them. A network with high availability provides an alternative means by which all infrastructure paths and key servers can be accessed at all times. It is important for you as a Cisco administrator to know how to implement high availability using Cisco IOS software. Features such as Hot Standby Router Protocol (HSRP) provide Layer 3 redundancy to network hosts. Virtual Router Redundancy Protocol (VRRP) and Gateway Load Balancing Protocol (GLBP) are used to provide additional Layer 3 redundancy features such as load balancing. This course covers how to configure Layer 3 redundancy with HSRP, VRRP and GLBP.

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