Patch

This section describes how to upload, load, and uninstall patches.

Context

There are two types of patches: cold patch and hot patch. A cold patch takes effect only after the switch restarts and a hot patch takes effect immediately after it is loaded to the switch. On the Patch page, you can load or uninstall hot patches only. You can load or uninstall cold patches on the Upgrade page.

A patch is a kind of software compatible with the system software. It is used to remove critical bugs of the system software. A patch file can contain a maximum of 20 patches. The extension name of the patch file is .pat.
Before loading patches, you need to save patch files to the storage device of the switch. Patch files are uploaded to the switch using HTTP.
After a patch is uninstalled, delete the patch from the memory.

Procedure

Choose Maintenance > System Maintenance > Patch. The Patch page is displayed.

Table 1 describes the parameters on the Patch page.

**Table 1** Parameters on the **Patch** page
Item	Description
Patch Information	Displays the following information about patches: Patches that have been loaded Patch version Running status of the patch
Uninstall Patch	Uninstall the running patch.
Upload Patch	Select the patch file to be uploaded. The file name is a string of characters without spaces and the file name extension is .pat.
Load patch	Select the patch file to be loaded.

Click Browse under Upload Patch, select the patch file to be uploaded, and click Upload.
Select the patch that you want to load from the Load patch drop-down list box and click Load patch. The currently loaded patch file is displayed under Patch Information.