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Flow Control
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.
NOTICE: The 100FX standard doesn't support Auto Negotiation, so when in 100FX mode the flow control
capabilities will always be shown as "disabled".
PFC
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 Flow control cannot both be
enabled on the same port.
Maximum Frame Size
Enter the maximum frame size allowed for the switch port, including FCS. The range is 1518-10240 bytes.
Excessive Collision Mode
Configure port transmit collision behavior.
Discard
: Discard frame after 16 collisions (default).
Restart
: Restart back off algorithm after 16 collisions.
Frame Length Check
Configures if frames with incorrect frame length in the EtherType/Length field shall be dropped. An Ethernet
frame contains a field EtherType which can be used to indicate the frame payload size (in bytes) for values of
1535 and below. If the EtherType/Length field is above 1535, it indicates that the field is used as an
EtherType (indicating which protocol is encapsulated in the payload of the frame). If "frame length check" is
enabled, frames with payload size less than 1536 bytes are dropped, if the EtherType/Length field doesn't
match the actually payload length. If "frame length check" is disabled, frames are not dropped due to frame
length mismatch. Note: No drop counters count frames dropped due to frame length mismatch
Buttons
Submit
: Click to submit changes.
Reset
: Click to undo any changes made locally and revert to previously saved values.
Refresh
: Click to refresh the page. Any changes made locally will be undone.