Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.1.x
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Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.1.x
Updated: April 10, 2026
Outlines Cisco In-Service Software Upgrade concepts, procedures, requirements, and best practices to enable seamless software upgrades on Cisco devices without impacting live traffic or causing service disruptions.
Explains how In-Service Software Upgrades (ISSUs) allow network administrators to upgrade Cisco wireless controllers without disrupting network packet forwarding.
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