Cisco recommends that you have knowledge of these topics:
VCS/Expressway deployment or configuration.
The information in this document is based on these software and hardware versions:
Putty or similar application.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.
If your VCS/Expressway are clustered, you must always upgrade the Primary node first followed by secondary nodes.
Do check Upgrade Prerequisites and Software Dependencies from release notes here.
To check the status of services after reboot or to troubleshoot in case of any issues you can make use of the VMware ESXI portal to take console access to the server.
Step 1. Navigate to Maintenance > Backup and Restore as shown in the image.
Step 2. Then enter the password for the backup file under Encryption password, Encryption password confirmation, and then select on Create system backup file in order to download backup as shown in the image.
Collect xConfiguration backup: (This will help in order to easily re-configure the VCS/Expressway Server if loses configuration)
Step 1. Use putty (or similar application) take SSH access VCS/Expressway Servers (one after another) you wish to upgrade.
Step 2. In order to save the session output your system and run the command,
Note: If you wish to upgrade to a new major release, for example from X7.x to X8.x, you first need to obtain a new release key from Cisco. The key is required during the upgrade process.
Step 3. Navigate to Maintenance > Maintenance mode and then set Maintenance mode to On, select Save and Ok on the confirmation dialog.
Step 4. Wait for all calls to clear and registrations to timeout.
Note: If necessary, manually remove any calls or registrations if they do not clear automatically from Status > Calls and Status > Registrations > By device.
Step 5. Then Navigate to Maintenance > Upgrade to select upgrade file followed by the Upgrade button in order to upgrade the server as shown in the image.
Note: The web browser interface can timeout during the restart process after the progress bar has reached the end. This can occur if the Cisco VCS/Expressway carries out a disk file system check - which it does approximately once every 30 restarts.
Step 1. Navigate to Expressway GUI > Status > Overview in order to validate the upgraded version as shown in the image.
Step 2. Navigate to Status > Alarms in order to check if there are any alarms raised and act accordingly based on details provided at Expressway admin guides here.