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Flowcontrol, Flowcontrol 4-170 – SMC Networks SMC Tiger 10/100 SMC6128PL2 User Manual

Page 478

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Command Line Interface

4-170

4

Command Usage

When auto-negotiation is enabled with the negotiation command, the switch
will negotiate the best settings for a link based on the capabilites command.
When auto-negotiation is disabled, you must manually specify the link
attributes with the speed-duplex and flowcontrol commands.

Example

The following example configures Ethernet port 5 capabilities to 100half, 100full and
flow control.

Related Commands

negotiation (4-168)
speed-duplex (4-167)
flowcontrol (4-170)

flowcontrol

This command enables flow control. Use the no form to disable flow control.

Syntax

[no] flowcontrol

Default Setting

Disabled

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

Console(config)#interface ethernet 1/5
Console(config-if)#capabilities 100half
Console(config-if)#capabilities 100full
Console(config-if)#capabilities flowcontrol
Console(config-if)#