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Hitachi HF-BX1000 Instruction Manual page 75

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• Adaptive Inter-Frame Spacing
This compensates for excessive Ethernet packet collisions by dynamically controlling
back-to-back timing.
• Flow Control
This enables adapters to generate or respond to flow control frames, which help regulate
network traffic. The default setting of the flow control is different depending on the OS
and the type of LAN adapter in use. You must configure the flow control setting
according to the network you are using.
< NOTE >
• If the LAN driver stops due to a system failure such as an OS deadlock,
broadcast frames from other devices may not be able to be processed and the
receive queue may get full.
If Rx Enabled or Rx & Tx Enabled is specified for Flow Control, flow control
frames are continuously sent from this equipment under such a condition. If this
happens, that may affect the whole network connected to the equipment.
Specify Disabled for Flow Control at this equipment or at the connected hub
as required.
• If Disabled is specified for Flow Control and if the device receives frames
quicker than it can process, the device gets overloaded, and the frames receive
will be discarded until the device recovers from the overload condition. You
have to design the network appropriately to avoid such an overload condition.
• In LAN A (82579LM), flow control frames may be sent continuously in the event
of a blue screen even if you set Flow Control to OFF. To prevent this
operation, configure the equipment so it is restarted automatically after a
memory dump of a blue screen, or set Flow Control to OFF if the connected
hub allows this setting change.



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