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Command mode:
Port Mode.
Default:
Port flow control is disabled by default.
Usage Guide:
After the flow control function is enabled, the port will notify the sending device to slow down the sending speed to
prevent packet loss when traffic received exceeds the capacity of port cache. Ports support IEEE802.3X flow control;
the ports work in half-duplex mode, supporting back-pressure flow control. If flow control results in serious HOL, the
switch will automatically start HOL control (discarding some packets in the COS queue that may result in HOL) to
prevent drastic degradation of network performance.
Note:
Port flow control function is not recommended unless the users need a slow speed, low performance network
with low packet loss. Flow control will not work between different cards in the switch. When enable the port flow
control function, speed and duplex mode of both ends should be the same.
Example:
Enabling the flow control function in ports 1/1-8.
Switch(config)#interface ethernet 1/1-8
Switch(Config-If-Port-Range)#flow control
4.1.5 interface ethernet
Command:
interface ethernet
<interface-list>
Function:
Enters Ethernet Port Mode from Global Mode.
Parameters:
<interface-list>
stands for port number.
Command mode:
Global Mode
Usage Guide:
Run the
exit
command to exit the Ethernet Port Mode to Global Mode.