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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter11 Configuring Interface Characteristics
Configuring Ethernet Interfaces
•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 th e
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.
Note For details about 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 privi leged EXEC mode, fol l ow t h ese steps to configure flow control on an interface:
To disable flow control, use the flowcontrol receiv e off and flowcontrol send off interface configuration
commands.
This example shows how to turn off all flow control on a port and to display the re sult s:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# flowcontrol receive off
Switch(config-if)# flowcontrol send off
Switch(config-if)# end
Switch# show running-config
Adding a Description for an Interface
You can add a description about an interface to help you re member its f unctio n. The desc ription ap pears
in the output of these commands: show configuration, show running-config, and show interfaces.
Beginning in privileged EXEC mode, follow these steps to add a description for an interface:
Command Purpose
Step1 configure terminal Enter global configuration mode
Step2 interface interface-id Enter interface configuration mode and the physical interface to
be configured.
Step3 flowcontrol {receive | send} {on | off | desired} Configure the flow control mode for the port.
Step4 end Return to privileged EXEC mode.
Step5 show interfaces interface-id Verify the interface flow control settings.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode
Step2 interface interface-id Enter interface configuration mode, and enter the interface for which
you are adding a description.
Step3 description string Add a description (up to 240 characters) for an interface.
Step4 end Return to privileged EXEC mode.