Patch

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.

A patch is a kind of software compatible with the system software. It is used to remove critical bugs of the system software. 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

Manage patches of the parent.

Choose Maintenance > System Maintenance > Patch and click the Parent Patch Management tab,

Table 1 describes the parameters on the page.

**Table 1** **Parent Patch Management**
Item	Description
Upload the Parent Patch	Allows you to select the patch file to be uploaded.
Load a Patch to Parent	Allows you to select the patch file to be loaded.
Parent Patch Status	Indicates patch information: Current patch file Version number Status

Click to select the patch file to be uploaded and click Upload.
Select the patch file to be loaded and click Load. The system will display the currently loaded patch file in Parent Patch Status.

Manage patches of ASs.

Choose Maintenance > System Maintenance > Patch and click the AS Patch Management tab,

Table 2 describes the parameters on the page.

**Table 2** **AS Patch Management**
Item	Description
Upload the Patch File to the Parent	Allows you to select the patch file to be uploaded. You can upload the locally stored patch file to the parent.
Configure the FTP/SFTP Account Used to Load the Patch File on the AS	Configures the loading mode, account and password. NOTE: FTP is not a secure protocol, so SFTP is recommended. Before using the SFTP loading mode, enable the SFTP services on the Maintenance > System Maintenance > System > Service Management page. Configuring the SFTP loading mode will create an administrator account and configure the SSH account. To modify the accounts, go to the Maintenance > System Maintenance > Administrator page.
Load the Parent's Patch File to the AS	Allows you to select the required patch file based on the AS type. To load files of the parent to the AS or unload files from the AS, click Load or Uninstall. You can also view the loading progress and failure cause in the Upload Result column.
AS Patch Status	Displays patch status information.

Click and select the required patch file.
Click Upload to upload the patch file.
Configure the loading mode, account and password used to upload the patch file of an AS and click Apply.
Select the required patch file based on the AS type and click Load.
In the dialog box that is displayed, click OK.
View patch status information in AS Patch Status.