H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 12)

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To avoid congestion on GigabitEthernet 1/4, set 100 Mbps as the only option available for speed
negotiation on port GigabitEthernet 1/1, GigabitEthernet 1/2, and GigabitEthernet 1/3. As a result, the
transmission rate on each port connected to a server is limited to 100 Mbps.
Follow these steps to set speed options for auto negotiation on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Set speed options for auto
negotiation
speed auto { 10 | 100 | 1000 } * Optional
NOTE:
•
This function is available only for 1000-Mbps Ethernet interfaces that support speed auto negotiation.
• The speed and speed auto commands supersede each other, and whichever is configured last takes
effect.
Configuring flow control on an Ethernet interface
To avoid packet drops on a link, you can enable flow control at both ends of the link. When traffic
congestion occurs at the receiving end, the receiving end sends a flow control (Pause) frame to ask the
sending end to suspend sending packets
Follow these steps to enable flow control on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Enable TxRx flow control flow-control
Required
By default, Rx flow control is
disabled on an Ethernet interface.
Configuring physical state change suppression on an Ethernet
interface
The physical link state of an Ethernet interface is either up or down. Each time the physical link of a port
goes up or comes down, the physical layer reports the change to the upper layers, and the upper layers
handle the change, resulting in increased overhead.
To prevent physical link flapping from affecting system performance, configure physical state change
suppression to delay the reporting of physical link state changes. The physical layer reports the changes
only when the delay expires.
Follow these steps to configure physical state change suppression on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —