Planet GS-5220 Series User Manual page 162

Flow Control
•
• PFC
• Maximum Frame Size
• Excessive Collision
Mode
When Auto Speed is selected on a port, this section indicates the flow
control capability that is advertised to the link partner.
When a fixed-speed setting is selected, that is what is used. The
Current Rx column indicates whether pause frames on the port are
obeyed, and the Current Tx column indicates whether pause frames on
the port are transmitted. The Rx and Tx settings are determined by the
result of the last Auto-Negotiation.
Check the configured column to use flow control. This setting is related
to the setting for Configured Link Speed.
When PFC (802.1Qbb Priority Flow Control) is enabled on a port then
flow control on a priority level is enabled. Through
the Priority field, range (one or more) of priorities can be
configured, e.g. '0-3,7' which equals '0,1,2,3,7'. PFC is not supported
through auto negotiation. PFC and Flowcontrol cannot both be enabled
on the same port.
Enter the maximum frame size allowed for the switch port, including
FCS. The allowed range is 1518 bytes to 10056 bytes.
Configure port transmit collision behavior.
Discard: Discard frame after 16 collisions (default).

Restart: Restart back off algorithm after 16 collisions.

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User's Manual of GS-5220 LCD Series