Lanner FW-7540 - Manual (Page 42)

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Programming LAN Bypass
Appendix D
Network Application Platforms
Appendix D:
Programming LAN Bypass
The bypass function is used to link two independent
Ethernet ports when the system fails or powers off. This
means if your system is equipped with a LAN Bypass
function, a system failure or power-off event will not
interrupt your network traffic. There are typically two
statuses for the bypass, one is “Normal” state and the
other is “Bypass” status. Lanner provides three methods to
enable the LAN Bypass function:
Note: This Bypass in FW-7540 complies with
Lanner Generation 2 bypass
With the BIOS menu 1.
Bypass Settings
System Status
LAN Bypass for Port1 and Port 2 LAN Bypass
1&2 when
power off
PWR ON Enabled Disabled Enabled
Bypass Non-Bypass
PWR OFF Bypass Bypass
Bypass Settings
System Status
LAN Bypass for Port1 and Port 2 LAN Bypass
1&2 when
power off
PWR ON Enabled Disabled Disabled
Non-Bypass Non-Bypass
PWR OFF Non-Bypass Non-Bypass
A sample program to control the GPIO 2.
A watchdog timer can also be used to control the LAN 3.
Bypass function when the system fails or powers off.
For sample code, look for the LAN_Bypass_Watchdog
directory under Driver and Manual CD.
Follow these procedures to run the program:
1. Compile source code on Linux platform first with the
following command:
# gcc wdbp.c -o wdbp
2. Execute the program:
#./wdbp
3. Commands:
Enable the bypass
# wdbp.exe –f
Set
Watchdog Timer. This command will set the time
interval at which the counter will start count down.
# wdbp.exe -wl xxx (xxx: 1-255 sec for timer count down)
Reset Watchdog Timer. This command will reset the
watchdog timer’s counter and the bypass status to non-
bypass.
#wdbp.exe -wr xxx (xxx: 1-255 sec for timer count down)
Note: For more information, refer to the README
file contained within the program’s folder.