Cisco Catalyst 3550 series Software Configuration Manual page 254

Configuring Ethernet Interfaces
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Note For details on the command settings and the resulting flow control resolution on local and remote ports,
refer to the flowcontrol interface configuration command in the command reference for this release.
Beginning in privileged EXEC mode, follow these steps to configure flow control on an interface:
Command
Step 1 configure terminal
Step 2
no mls qos
Step 3
interface interface-id
Step 4 flowcontrol {receive | send} {on | off | desired} Configure the flow control mode for the port.
Step 5
end
Step 6
show interfaces interface-id
Step 7 copy running-config startup-config
To disable flow control, use the flowcontrol receive off and flowcontrol send off interface configuration
commands.
This example shows how to turn off all flow control on Gigabit Ethernet interface 0/1:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# flowcontrol receive off
Switch(config-if)# flowcontrol send off
Switch(config-if)# end
Catalyst 3550 Multilayer Switch Software Configuration Guide
10-16
receive on (or desired) and send desired: The port can receive pause frames and can send pause
frames if the attached device supports flow control.
receive on (or desired) and send off: The port cannot send pause frames but can operate with an
attached device that is required to or can send pause frames; the port can receive pause frames.
receive off and send on: The port sends pause frames if the remote device supports flow control but
cannot receive pause frames from the remote device.
receive off and send desired: The port cannot receive pause frames but can send pause frames if the
attached device supports flow control.
receive off and send off: Flow control does not operate in either direction. In case of congestion, no
indication is given to the link partner, and no pause frames are sent or received by either device.
Chapter 10
Purpose
Enter global configuration mode
Disable QoS on the switch.
Enter interface configuration mode and the physical interface to
be configured.
The send keyword is not available for 10/100 Mbps ports.
Note
Return to privileged EXEC mode.
Verify the interface flow control settings.
(Optional) Save your entries in the configuration file.
Configuring Interface Characteristics
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