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3.2.1.2.3 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 ports of ES4626/ES4650 support 802.3X fallback
flow control ; the ports work in half duplex mode, supporting fallback flow control. If the
fallback control may result in serious HOL, the switch will automatically start HOL control
(discard 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 user needs 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: Enable the flow control function in ports 1/1-8.
Switch(Config)#interface ethernet 1/1-8
Switch(Config-Port-Range)#flow control
3.2.1.2.4 interface ethernet
Command: interface ethernet <interface-list>
Function: Enter Ethernet Interface Mode from Global Mode.
Parameter: <interface-list> stands for port number.
Command mode: Global Mode
Usage Guide: Run exit command will exit the Ethernet Interface Mode to Global Mode.
Example: Enter the Ethernet Interface Mode for port 1/1, 2/4-5, 3/8.
Switch(Config)#interface ethernet 1/1;2/4-5;3/8
Switch(Config-Port-Range)#
3.2.1.2.5 loopback