Performing In-Service Patch Installation

Performing in-service patch installation on a device allows the current system software on the device to be upgraded without service interruption.

Applicable Environment

You can use either of the following methods to install patches:

• Performing in-service patch installation: The patch files take effect after a command is run, without having to restart the device.
• Performing patch installation that takes effect at the next startup: The installed patch files take effect after the device is restarted. For details, see Performing Patch Installation that Takes Effect at the Next Startup.

This feature is supported only on the Admin-VS but takes effect on all VSs.

Pre-configuration Tasks

Before performing in-service patch installation, complete the following task:

• Logging in to a device to be upgraded

Installing a Patch File

After a patch file has been uploaded to the storage medium of a device, the patch file needs to be installed to the patch area in the memory.

Verifying the Configuration of In-Service Patch Installation

This section describes how to check whether a patch file has been installed onto a device.