FW-7573 User Manual
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The bypass function is used to link two independent Ethernet ports when the system crashes 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. Different from the previous two generations (Gen1 and Gen2), the Lanner
Bypass Gen 3 employs a programming method to control the bypass function by software. There are
typically two communication statuses for the bypass function; one is “Normal’, and another is “Bypass”
status. Furthermore, the Lanner Bypass software is capable of controlling the bypass status in the following
3 states:
1.
When the system powers off, it can be forced to enable the LAN Bypass function .
2.
When the system is in the just-on state which is a brief moment when it powers up .
3.
When the system is running
And the Lanner bypass possesses the following features:
1.
Communication through SMBUS (I2C)
2.
Independent bypass status control for each pair up to a total of 4 pairs
3.
Lanner Bypass Modules can bypass systems Ethernet 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).
4.
Software programmable bypass or normal mode
5.
Software programmable timer interval:
- 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.
6.
Multiple Watchdog Timers:
-Two for run-time: It is designed to give you a more variety of controls of the bypass on a 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.
For sample LAN bypass code, please download the ZIP file “FW 7573 7571 drivers” from
http://www.lannerinc.com/category/1197-network-appliances
, and “Lanner Bypass Watchdog module-
user guide” from
http://www.lannerinc.com/category/1202-network-appliances
