Flowcontrol - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

flowcontrol

To configure a Gigabit Ethernet interface to send or receive pause frames, use the flowcontrol command.
To disable the flow control setting, use the no form of this command.
Syntax Description
receive
send
off
on
desired
Defaults
The default settings for Gigabit Ethernet interfaces are as follows:
•
•
•
•
Table 2-3
Table 2-3
Module
All modules except
WS-X4418-GB and
WS-X4416-2GB-TX
WS-X4418-GB
WS-X4418-GB
WS-X4412-2GB-TX
WS-X4412-2GB-TX
WS-X4416-2GB-TX
Command Modes Interface configuration mode
Command History Release
12.1(8a)EW
OL-25342 -01
flowcontrol {receive | send} {off | on | desired}
no flowcontrol {receive | send} {off | on | desired}
Specifies that the interface processes pause frames.
Specifies that the interface sends pause frames.
Prevents a local port from receiving and processing pause frames from remote ports or
from sending pause frames to remote ports.
Enables a local port to receive and process pause frames from remote ports or send
pause frames to remote ports.
Obtains predictable results whether a remote port is set to on, off, or desired.
Sending pause frames is off—Non-oversubscribed Gigabit Ethernet interfaces.
Receiving pause frames is desired—Non-oversubscribed Gigabit Ethernet interfaces.
Sending pause frames is on—Oversubscribed Gigabit Ethernet interfaces.
Receiving pause frames is desired—Oversubscribed Gigabit Ethernet interfaces.
shows the default settings for the modules.
Default Module Settings
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
Ports
All ports except for the
oversubscribed ports
Uplink ports (1–2)
Oversubscribed ports (3–18) On
Uplink ports (13–14)
Oversubscribed ports (1–12) On
Uplink ports (17–18)
Send
Off
Off
Off
Off
flowcontrol
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