Upgrading S series switch through BootROM

To upgrade S series switches (except S1700 switches) using the BootROM, perform as follows:
1. Prepare the software package to be uploaded, and start the FTP or TFTP software on the PC as an FTP or TFTP server.
2. Connect the PC to the switch through a console cable, and start the terminal software (such as SecureCRT or HyperTerminal).
3. Power off and restart the switch. When the message "Press Ctrl+B to enter BOOTROM menu..." is displayed, press Ctrl+B to enter the BootROM menu. (The default BootROM password of fixed switches is huawei in versions earlier than V100R006C03 and Admin@huawei.com in V100R006C03 and later. The default BootROM password of modular switches is 9300 in versions earlier than V100R006 and Admin@huawei.com in V100R006 and later.)
4. Enter the file system submenu to verify that sufficient space is available for storing the system software.
5. Enter the Ethernet submenu to set FTP or TFTP parameters as prompted and download the system software package for the upgrade from the FTP server.
6. Enter the startup submenu to specify the newly uploaded system software package as the software for next startup.
7. Restart the switch.

Other related questions:
Bootrom upgrade on S series switch
How to upgrade an AC through BootROM
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