Lanner FW-7582 User Manual download pdf (Page 40)

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 Generation 3 bypass

utility provides software for controlling the LAN Bypass

function:

Lanner ‘s Bypass Modules include WDT (Watch Dog Timer)

controller and Bypass switch.

Our Bypass Modules also include a software development

kit that enables system designer to efficiently design

systems to support bypass functionality. Lanner Bypass

Modules with watchdog control have the following

features:

Communication through SMBUS (I2C)1.

Independent bypass status control for each pair up to 2.

a total of 4 pairs

Lanner Bypass Modules can bypass systems Ethernet 3.

ports on a host system during three instances: Just-on

(Just-on is the brief moment when the internal power

supply turns on and booting process starts), system

off, or upon software request (during run-time).

Software programmable bypass or normal mode4.

Software programmable timer interval:5.

- JUST-ON watchdog timer, used during JUST-ON, has

timer setting of 5~1275 seconds of timer interval.

- Run-Time watchdog timer, used during run-time, has

setting of 1~255 seconds of timer interval.

Multiple Watchdog Timers:6.

-Two for run-time: It is designed to give you a more

variety of controls of the bypass on port basis. By

using dedicated watchdogs for different pairs of

bypass, you have the flexibility to manage the bypass

status for them differently.

-One for just-on: It is designed to give you the precise

control of the bypass during this phase. You can use

this timer to delay enabling the bypass in just-on

state.

Note:

For sample LAN bypass code and the Bypass 1.

Manual, see the LAN_Bypass folder on the

Driver and Manual CD or the Lanner Assist

Website at http://assist.lannerinc.com. And

browse the support center and look for Lanner

LAN Bypass Module Manual under Software

Utility Manuals folder.

For a description of the physical LAN ports 2.

equipped with this function, refer to Front Panel

Features in Chapter 1 Introduction.

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