What is a patch of a WLAN device

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

Patch classification:

- Hot patch

Hot patches do not interrupt running services of a WLAN device and can repair software defects of the current system without restarting the device.

- Cold patch

Cold patches repair software defects of the current system only after a device restart.

SPH indicates a hot patch, while SPC indicates a cold patch. The patch file uses .pat as the file name extension.

Other related questions:
Downloading patch files for WLAN devices
To download a patch file of a WLAN device, perform the following operations: 1. Visit http://support.huawei.com/enterprise/en/index.html. 2. Click Software Download. Under By Product, click WLAN. 3. Select a WLAN device model. 4. Select the latest patch file ending with SPHxxx, and download the related patch release notes and patch installation guide.

How can I delete patches from a WLAN device
Run the following command to delete patches from a WLAN device: patch delete all //Delete all patches. Delete patches when the following situations occur: - If you find errors in patches that have been loaded to the system, run this command to delete the patches to prevent patch errors from affecting system operating. - If the patch installation fails and a rollback procedure is necessary, run this command to delete all patches.

What should I do if an error message is displayed when a patch is installed on a WLAN device
If a patch fails to be installed due to various reasons and needs to be removed, run the patch delete all command to delete the patch, and check whether the patch is correct or compatible with the current software version.

Common problems on a WLAN
Problems on a WLAN are classified into the following types: - Network-side problems - Insufficient bandwidth - Link faults - License restraints (only for ACs) - Incorrect configurations - AP-side problems - Incorrect AP working mode - Power supply failures - Faults of network cables connected to APs - Radio coverage problems - Co-channel interference - Improper channel distribution - Insufficient antenna coverage - Faults of components in an indoor distributed WLAN system

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