Lanner FW-8750 - Manual (Page 42)

FW-8750
42
E. Appendix E: LAN Bypass Function
E.1 Introduction
The bypass function is used to link (or short) two independent Ethernet
ports when the system crash or powers off. This means if your system is
equipped with a LAN Bypass function, a condition in your system will not
interrupt your network traffic. There are typically two communication states
for the bypass function, one is “Normal” state and another is “Bypass” state.
Lanner provides three methods for enabling the LAN Bypass function.
1. When the system powers off, it will be forced to enable the LAN Bypass
function directly..
2. User can enable or disable the LAN Bypass function by programming
which Control by GPIO.
3. A watchdog timer（WDT）can be used to control the LAN Bypass
function via programming.
Please refer to the Intel 82573L datasheet on the Manual/ Driver CD under
the path// LAN_Bypass. Lanner also provides sample code for reference.