Article Overview
The serial number of a Huawei fiber optic switch can be found on the physical device label, via CLI commands, or through the web management interface.
Physical Label
The serial number is typically printed on a label attached to the rear, bottom, or side of the switch chassis. For rack-mounted units, the label may be on the side and partially hidden. The serial number is usually a 20-character barcode starting with "21" (e.g., 210235383610C3000006) and is clearly marked as the device SN .
Command-Line Interface (CLI)
You can retrieve the serial number using the switch console, Telnet, or SSH:
display esn: Shows the equipment serial number (ESN) of the switch .display elabel slot slot-id: Displays the electronic label information for a specific slot, including the serial number under theBarCodefield .display device manufacture-info [slot slot-id]: Provides manufacturing information, including the serial number and manufacturing date. This command is supported in V200R003 and later versions .
Web Management Interface
If the switch has the web NMS enabled:
- EasyOperation Web System (V200R005 and later): Log in, click Monitor on the toolbar, and view the device information, including the serial number .
- Classic Web System: Log in, click Device Summary, and check the card information to find the serial number .
- Navigate to System Management > Device Information in the web GUI to see the serial number field clearly displayed . By using any of these methods, you can accurately locate the serial number for warranty verification, technical support, or network management purposes.
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