Flow Control; Interface Ethernet - Digitalchina Networks DCS-3950 series Manual

Example: Set ports 0/1/1,0/2/1 to fiber-forced
Switch(Config)#interface ethernet 0/1/1;0/2/1
Switch(Config-Port-Range)#combo-forced-mode sfp-forced

7.2.1.2.5 flow control

Command: flow control
no flow control
Function: Enable the flow control function for the port: the 'no flow control' command
disables the flow control function for the port.
Command mode: Interface 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. The switch's ports support IEEE802.3X flow control;
the ports work in half-duplex mode, supporting back-pressure flow control.
Note: When enable the port flow control function, speed and duplex mode of both ends
should be the same.
Example: Enable the flow control function in ports 1/1-8.
Switch(Config)#interface ethernet 0/0/1-8
Switch(Config-Port-Range)#flow control

7.2.1.2.6 interface ethernet

Command: interface ethernet <interface-list>
Function: Enter Ethernet Interface Mode from Global Mode.
Parameters: <interface-list> stands for port number. Formats and ranges for the port
numbers are described in the ports introduction section of this chapter.
Command mode: Global Mode
Usage Guide: Run the exit command to exit the Ethernet Interface Mode to Global Mode.
Example: Enter the Ethernet Interface Mode for ports 0/0/1, 0/0/4-5, 0/0/8.
Switch(Config)#interface ethernet 0/0/1;0/0/4-5;0/0/8
Switch(Config-Port-Range)#
7.2.1.2.7 loopback
Command: loopback
no loopback
Function: Enable the loopback test function in an Ethernet port; the 'no loopback'
command disables the loopback test on an Ethernet port.
Default: Loopback test is disabled in Ethernet port by default.
Command mode: Interface Mode
Usage Guide: Loopback test can be used to verify the Ethernet ports are working
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