You can upgrade firmware on all nodes in a cluster from the primary node.
The following process occurs when you perform the HA upgrade procedure:
After the upgrade process is completed, the system determines whether the original node becomes the primary node, according to the HA Override setting:
Reboot times vary by the appliance model, and also by differences between the original firmware version and the firmware version you are installing.
The administrator procedure for an HA cluster is similar to the procedure for installing firmware on a standalone appliance. To ensure minimal interruption of service to clients, use the following steps. The same procedure applies to both active-active and active-passive clusters.
If downgrading to a previous version, do not use this procedure. The HA daemon on a member node might detect that the primary node has older firmware, and attempt to upgrade it to bring it into sync, undoing your downgrade. Instead, switch out of HA, downgrade each node individually, then switch them back into HA mode. |
Before you begin:
admin
administrator. After the new firmware has been installed, the system reboots.
When you update software, you are also updating the web UI. To ensure the web UI displays the updated pages correctly:
In most environments, press Ctrl-F5 to force the browser to get a new copy of the content from the web application. See the Wikipedia article on browser caching issues for a summary of tips for many environments: |