Push the upgrade package to the 2110 device ahead of time to reduce the actual maintenance window duration.
Use the Cisco Secure Firewall Compatibility Guide to ensure your current FTD version can upgrade directly to your target version. cisco firepower 2110 threat defense upgrade
Always take a full backup of both the FMC and the FTD device before starting. Push the upgrade package to the 2110 device
Before initiating the upgrade, verify compatibility and perform essential backups. select the 2110
Upgrading a running Firepower Threat Defense (FTD) is a multi-stage process that requires careful planning to minimize downtime and ensure system stability. 1. Pre-Upgrade Preparation
Navigate to Devices > Device Management , select the 2110, and click Install .
For HA pairs, the FMC will upgrade the standby unit first, perform a failover, and then upgrade the former active unit to maintain traffic flow. Using Firepower Device Manager (FDM)