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Chapter 4 Command-Line Reference 4-87
Default Setting
Enabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
■ Down-link ports SNP0-15 are fixed with auto-negotiation disabled.
■ When auto-negotiation is enabled the switch will negotiate the best settings for
a link based on the capabilites command. When auto-negotiation is
disabled, you must manually specify the link attributes with the speed-
duplex and flowcontrol commands.
■ If auto-negotiation is disabled, auto-MDI/MDI-X pin signal configuration will
also be disabled for the up-link ports. This means that you may have to use a
cross-over cable to connect two switches. However, an alternative is to leave
auto-negotiation enabled (this is the default setting) but reduce the subset of
permitted modes to the single mode that you want to use.
Example
The following example configures port SNP11 to use auto-negotiation.
Related Commands
capabilities (4-87)
speed-duplex (4-85)
flowcontrol (4-89)
4.3.8.5 capabilities
Use this command to advertise the port capabilities of a given interface during auto-
negotiation. Use the no form with parameters to remove an advertised capability, or
the no form without parameters to restore the default values.
Console(config)#interface ethernet SNP11
Console(config-if)#negotiation
Console(config-if)#