General switch administration using the Command Line Interface
181
To enable flow control using the CLI, see the following sections:
•
"flowcontrol command" (page 181)
•
"no flowcontrol command" (page 181)
•
"default flowcontrol command" (page 182)
flowcontrol command
Use the
flowcontrol
command only on Gigabit Ethernet ports to control
the traffic rates during congestion.
The syntax for the
flowcontrol
command is
flowcontrol [port <portlist>] {asymmetric | symmetric | auto
| disable}
Run the
flowcontrol
command in Interface Configuration mode.
"Flowcontrol parameters" (page 181)
describes the parameters for this
command.
Flowcontrol parameters
Parameters and
variables
Description
port <portlist>
Specify the port numbers to configure for flow control.
Note: If you omit this parameter, the system uses the
ports you specified in the
interface
command but
only those ports that have speed set to 1000/full.
asymmetric |
symmetric | auto |
disable
Set the mode for flow control:
•
asymmetric: PAUSE frames can flow only in one
direction.
•
symmetric: PAUSE frames can flow in either
direction.
•
auto: Set the port to automatically determine the
flow control mode (default).
•
disable: Disable flow control on the port.
no flowcontrol command
Use the
no flowcontrol
command only on Gigabit Ethernet ports to
disable flow control.
The syntax for the
no flowcontrol
command is
Nortel Ethernet Routing Switch 4500 Series
Overview — System Configuration
NN47205-500
02.01
Standard
5.0
23 February 2007
Copyright © 2007, Nortel Networks
Nortel Networks Confidential
.