Speed - Cisco Catalyst 3750 Command Reference Manual

speed

speed
Use the speed interface configuration command on the switch stack or on a standalone switch to specify
the speed of a 10/100 Mbps or 10/100/1000 Mbps port. Use the no or default form of this command to
return the port to its default value.
For speed configuration restrictions on small form-factor pluggable (SFP) module ports, see the "Usage
Note
Guidelines" section.
Syntax Description
10
100
1000
auto
nonegotiate
Defaults The default is auto.
Command Modes
Interface configuration
Command History Release
12.1(11)AX
12.2(20)SE1
Usage Guidelines You can configure the Fast Ethernet port speed as either 10 or 100 Mbps. You can configure the Gigabit
Ethernet port speed as 10, 100, or 1000 Mbps.
You cannot configure speed on SFP module ports, but you can configure the speed to not negotiate
(nonegotiate) if connected to a device that does not support autonegotiation.
When a 1000BASE-T SFP module is in the SFP module slot, you can configure the speed as 10, 100,
1000, or auto, but not to nonegotiate.
You cannot configure speed on the 10-Gigabit Ethernet ports.
Catalyst 3750 Switch Command Reference
2-544
speed {10 | 100 | 1000 | auto [10 | 100 | 1000] | nonegotiate}
no speed
Port runs at 10 Mbps.
Port runs at 100 Mbps.
Port runs at 1000 Mbps. This option is valid and visible only on 10/100/1000
Mbps-ports.
Port automatically detects the speed it should run at based on the port at the other
end of the link. If you use the 10, 100, or 1000 keywords with the auto keyword, the
port only autonegotiates at the specified speeds.
Autonegotiation is disabled, and the port runs at 1000 Mbps. This option is valid and
visible only on SFP module ports when a 1000BASE-T SFP module is not inserted
in the SFP module slot.
Modification
This command was introduced.
Support for the 10, 100, and 1000 keywords with the auto keyword was added.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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