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Example
The following example configures Ethernet port 5 capabilities to 100half,
100full and flow control.
flowcontrol
Use this command to enable flow control. Use the no form to disable
flow control.
Syntax
flowcontrol
no flowcontrol
Default Setting
Flow control enabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• Flow control can eliminate frame loss by “blocking” traffic from end
stations or segments connected directly to the switch when its buffers
fill. When enabled, back pressure is used for half-duplex operation and
IEEE 802.3x for full-duplex operation.
• To enable flow control under autonegotiation, flowcontrol must be
included in the capabilities list for any port.
• To force operation to the mode specified in a flowcontrol
command, use the no negotiation command to disable
auto-negotiation on the selected interface.
• Flow control should not be used if a port is connected to a hub.
Otherwise flow control signals will be propagated throughout the
segment.
Console(config)#interface ethernet 1/5
Console(config-if)#capabilities 100half
Console(config-if)#capabilities 100full
Console(config-if)#capabilities flowcontrol
Console(config-if)#