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Local and Remote Interfaces Have Different Duplex Modes, Rates, and Negotiation modes
Troubleshooting Procedure
- Run the display interface [ interface-type [ interface-number ] ] command to check the duplex mode, speed, and negotiation mode of the interface.
- View the Negotiation field.
- ENABLE: indicates that the interface works in auto-negotiation mode.
- DISABLE: indicates that the interface works in non-auto negotiation mode.
The two interfaces must work in the same negotiation mode. Run the negotiation auto command in the interface view to enable auto negotiation on the interfaces. If the fault persists, disable auto negotiation and forcibly set the same rate and duplex mode on the interfaces.
- View the Speed field. If the two interfaces work at different rates in non-auto negotiation mode, run the speed command in the interface view to set the same rate on the two interfaces.
- View the Duplex field. If the two interfaces work in different duplex modes in non-auto negotiation mode, run the duplex command in the interface view to set the same duplex mode on the two interfaces.
- View the Negotiation field.