ADLINK CSA-5100 - Manual (Page 31)

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CSA-5100
5 LAN Bypass Function
The CSA-5100 is equipped with a LAN Bypass function to allow uninterrupted network traffic
in the case of power disruption, system failure, or if a single in-line appliance is shut down or
hangs. The default behaviour of the LAN Bypass function is determined by BIOS setting
Under the following conditions, GPIO signals trigger the LAN bypass mechanism:
• Bypass button on front panel is pushed when the system is powered on.
• System crash occurs (after reboot with Watchdog Timer is running under Linux)
• System is powered on but not running OS (if enabled in BIOS)
• After booting into OS (if enabled in BIOS and Watchdog Timer is not running under
Linux)
• Power turned off or disconnected
5.1 Hardware Description
The CSA-5100 can bypass the LAN port on designated NIMs (CSA-Z4X01, CSA-Z8X10).
CSA-5100 LAN Bypass Hardware Layout
(1) Bypass Button:
Enable/Disable LAN bypass by pushing the Bypass Button when the system is
powered on.
(2) Bypass LED (middle LED) :
Red: Bypass enabled
Off: Bypass disabled
(3) LAN Bypass Port Pairing (CSA-Z4X01)
LAN Bypass Pair 1:
LAN1 & LAN2
LAN Bypass Pair 2: LAN3 & LAN4
2 3 1