July 2022
Intermediate to advanced
656 pages
19h 56m
English
book
Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers
by Nicolas Darchis, Simone Arena, Francisco Sedano Crippa, Sudha Katgeri
Content preview from Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers
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Chapter 10
C9800 High Availability
High availability (HA) refers to the capability of a network system to maintain uptime and provide service even in case of failure. Typically, this effect is achieved by setting up two or more systems that match capabilities to operate in a load-balanced fashion or in a redundant fashion. Catalyst 9800 wireless LAN controllers—specifically the C9800-L, C9800-40, C9800-80, and C9800-CL on the private cloud (ESXi, KVM and HyperV)—support one-to-one box-to-box redundancy. In other words, only two chassis, in the case of C9800-40, C9800-80, and C9800-L, or two instances, in the case of the C9800-CL, form the redundant pair to provide always-on service. Continuity of service is expected for both planned and unplanned ...