Interface Commands
27-4
27
negotiation
This command enables autonegotiation for a given interface. Use the no form to
disable autonegotiation.
Syntax
[no] negotiation
Default Setting
Enabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• 1000BASE-T and 10GBASE-T do not support forced mode. Auto-negotiation
should always be used to establish a connection over any 1000BASE-T or
10GBASE-T port or trunk.
• When auto-negotiation is enabled the switch will negotiate the best settings
for a link based on the capabilities command. When auto-negotiation is
disabled, you must manually specify the link attributes with the speed-duplex
and flowcontrol commands.
• If autonegotiation is disabled, auto-MDI/MDI-X pin signal configuration will
also be disabled for the RJ-45 ports.
Example
The following example configures port 11 to use autonegotiation.
Related Commands
capabilities (27-4)
speed-duplex (27-3)
capabilities
This command advertises the port capabilities of a given interface during
autonegotiation. Use the no form with parameters to remove an advertised
capability, or the no form without parameters to restore the default values.
Syntax
[no] capabilities {10000full | 1000full | 100full | 100half | 10full | 10half |
flowcontrol | symmetric}
• 10000full - Supports 10 Gbps full-duplex operation
• 1000full - Supports 1 Gbps full-duplex operation
• 100full - Supports 100 Mbps full-duplex operation
• 100half - Supports 100 Mbps half-duplex operation
Console(config)#interface ethernet 1/11
Console(config-if)#negotiation
Console(config-if)#
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