What are Rolling Stack Upgrades (RSU) and In-Service Software Upgrades (ISSU) and how should you use them? In this blog post, let’s take a look at the basics of network software high availability.
Tags: catalyst, Demystify the Catalyst, eFSU, HA, High Availability, In-Service Software Upgrade, ios basics, ISSU, Rolling Stack Upgrade, RSU, Switching 101, upgrading fixed switches, zero down time