I
NTERFACE
C
OMMANDS
3-87
speed-duplex
Use this command to configure the speed and duplex mode of a given
interface when autonegotiation is disabled. Use the no form to restore the
default.
Syntax
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
Default Setting
• Auto-negotiation is enabled by default.
• When auto-negotiation is disabled, the default speed-duplex setting is
100half for 100BASE-TX ports and 1000full for Gigabit Ethernet
ports.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• To force operation to the speed and duplex mode specified in a
speed-duplex command, use the no negotiation command to
disable auto-negotiation on the selected interface.
• When using the negotiation command to enable auto-negotiation,
the optimal settings will be determined by the capabilities command.
To set the speed/duplex mode under auto-negotiation, the required
mode must be specified in the capabilities list for an interface.
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