Chapter 26: Interface Commands
– 929 –
C
OMMAND
U
SAGE
This command allows you to disable a port due to abnormal behavior
(e.g., excessive collisions), and then re-enable it after the problem has
been resolved. You may also want to disable a port for security reasons.
E
XAMPLE
The following example disables port 5.
Console(config)#interface ethernet 1/5
Console(config-if)#shutdown
Console(config-if)#
speed-duplex
This command configures the speed and duplex mode of a given interface
when auto-negotiation is disabled. Use the
no
form to restore the default.
S
YNTAX
speed-duplex
{
1000full
|
100full
|
100half
|
10full
|
10half
}
no speed-duplex
1000full
- Forces 1000 Mbps full-duplex operation
100full
- Forces 100 Mbps full-duplex operation
100half
- Forces 100 Mbps half-duplex operation
10full
- Forces 10 Mbps full-duplex operation
10half
- Forces 10 Mbps half-duplex operation
D
EFAULT
S
ETTING
•
Auto-negotiation is enabled by default.
•
When auto-negotiation is disabled, the default speed-duplex setting is
100full for 1000BASE-T ports.
C
OMMAND
M
ODE
Interface Configuration (Ethernet, Port Channel)
C
OMMAND
U
SAGE
•
The 1000BASE-T standard does not support forced mode. Auto-
negotiation should always be used to establish a connection over any
1000BASE-T port or trunk. If not used, the success of the link process
cannot be guaranteed when connecting to other types of switches.
•
To force operation to the speed and duplex mode specified in a
speed-
duplex
command, use the
no
command to disable auto-
negotiation on the selected interface.
•
When using the
command to enable auto-negotiation, the
optimal settings will be determined by the
command. To set
the speed/duplex mode under auto-negotiation, the required mode
must be specified in the capabilities list for an interface.
Summary of Contents for SSE-G2252
Page 42: ...44 General IP Routing on page 627...
Page 603: ...Chapter 16 IP Configuration Setting the Switch s IP Address IP Version 6 609...
Page 883: ...Chapter 24 General Security Measures Port based Traffic Segmentation 894...
Page 989: ...Chapter 30 Congestion Control Commands Automatic Traffic Control Commands 1000 Console...
Page 1007: ...Chapter 33 Address Table Commands 1019...
Page 1137: ...Chapter 38 Quality of Service Commands 1150...