User’s Manual
WIN Enterprises, Inc.
Sept., 2010
67
Appendix B: LAN Bypass Programming Guide
WIN PL-80160 provides LAN bypass functionality to ensure that data can still pass
through the device, even when it is powered off. This feature helps ensure the
continuous flow of data through the device in the event of a hardware failure. For
network security appliances deployed at the gateway, for example, it is crucial that
they provide LAN bypass functionality to ensure that hardware failure on these
appliances will not bring down the entire network. Related BIOS settings are in the
“Super IO Configuration” section.
The PL-80160 provides two pair bypass function between CN28 / CN29 and CN31 /
CN32 LAN ports on motherboard. (Refer to Page 10.). The BIOS “Power on/off
Bypass” settings control the bypass function through GPIO pins.
End
1. LAN Bypass Definition
There are two bypass settings in BIOS setup.
Power off Bypass: Enable/Disable
Power on Bypass: Enable/Disable
Note: If “Power off Bypass” set to “Disable”, the “Power on Bypass” also set to
“Disable” and it can not allow to be changed or selected.
The table and figures below are the explanation for the behavior of LAN Bypass
function.
Power status
BIOS Bypass setting
Bypass Behavior
Power off Bypass: Disable
Power on Bypass: Disable
A
Power off Bypass: Enable
Power on Bypass: Disable
A
ON
Power off Bypass: Enable
Power on Bypass: Enable
* Note
B
Power off Bypass: Disable
Power on Bypass: Disable
A
Power off Bypass: Enable
Power on Bypass: Disable
B
OFF
Power off Bypass: Enable
B
