System information

Troubleshooting
A-2
Upgrading Firmware via the Serial Port
You can upgrade system firmware by connecting your computer to the serial port on
the switch, and using a console interface package that supports the XModem
protocol. (See “Required Connections” on page 1-1.)
1. Restart the system by using the Restart System command or resetting the power
by pulling out the power cord, waiting five seconds, and plugging it back in.
2. When the system initialization screen appears as shown below, press “D” to
download system firmware, and then indicate the code type (1: Runtime, 2:
POST, 3: Mainboard).
For example, if you select 1 (for downloading agent firmware), the system will
display the following message:
3. Change your baud rate to 115200 bps, and press Enter to enable download
mode. From the terminal emulation program, select the file you want to
download, set the protocol to XModem, and then initialize downloading.
Notes: 1. If you use Windows HyperTerminal, disconnect and reconnect to
enable the new baud rate.
2. The download file should be a CheetahSwtich Workgroup-3726M binary file
from Accton; otherwise the agent will not accept it. The file naming
convention is:
Runtime program: Agent-Vx.yz,
POST program: Boot-Vx.yx, and
Mainboard program: 8051-Vx.yz
850 POST for L2, 06/07/2001
LOADER Version V1.02
POST Version V1.11
------ Performing the Power-On Self Test (POST) ------
EPROM Checksum Test ....................... PASS
Testing the System SDRAM .................. PASS
CPU Self Test ............................. PASS
EEPROM Checksum Test ...................... PASS
SEEPROM Checksum Test ..................... PASS
MAC Address ..............00-10-b5-fd-84-bb
------------ Power-On Self Test Completed ------------
(D)ownload System Image or (S)tart Application: [S]
(D)ownload System Image or (S)tart Application: [S]
Select the Firmware Type to Download (1)Runtime (2)POST
(3)Mainboard [1]: 1
Your Selection: Runtime Code
Download code to FlashROM address 0x02880000