![background image](http://html1.mh-extra.com/html/smc-networks/6724al2/6724al2_management-manual_1300175279.webp)
I
NTERFACE
C
OMMANDS
3-91
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 force flow control on or off (with the
flowcontrol
or
no
flowcontrol
command), use the
no negotiation
command to
disable auto-negotiation on the selected interface.
• When using the
negotiation
command to enable auto-negotiation,
the optimal settings will be determined by the
capabilities
command.
To enable flow control under auto-negotiation, “flowcontrol” must be
included in the capabilities list for any port.
• Avoid using flow control on a port connected to a hub unless it is
actually required to solve a problem. Otherwise back pressure jamming
signals may degrade overall performance for the segment attached to
the hub.
Example
The following example enables flow control on port 5.
Related Commands
negotiation (3-89)
capabilities (flowcontrol, symmetric) (3-90)
Console(config)#interface ethernet 1/5
Console(config-if)#flowcontrol
Console(config-if)#no negotiation
Console(config-if)#
Summary of Contents for 6724AL2
Page 2: ......
Page 404: ...COMMAND LINE INTERFACE 3 216 ...
Page 406: ...TROUBLESHOOTING A 2 ...
Page 418: ...GLOSSARY Glossary 8 ...
Page 422: ...INDEX Index 4 ...
Page 423: ......