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E. appendix e: lan bypass function, E.1 introduction – Lanner FW-8892 User Manual

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FW-8892

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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. (You can control this functioin by BIOS to enable or
Disable it).

[BIOS] Æ [Advanced] Æ [LAN Bypass when power off] Æ[Enable/Disable]

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 Manual/ Driver CD under the path//Sample_code. Lanner

also provides sample code for reference.