speed auto-negotiation

Usage Scenario

If an optical interface is configured to work in auto-negotiation mode using the negotiation auto command, the interface cannot negotiate the rate with another interface. You can run the speed auto-negotiation command to configure the auto-negotiation function on the interface.

Prerequisites

Run the negotiation auto command to enable auto-negotiation before using the speed auto-negotiation command on the interface.

Precautions

• The speed auto-negotiation command will make flow control auto-negotiation and internal loopback ineffective.
• After configuring the auto-negotiation function on an interface, if you remove and install a single optical fiber on the interface, the interface may be Up and the remote interface may be down. You can run the shutdown and undo shutdown commands on the remote interface to make the remote interface go Up.
• After auto-negotiation is configured on an interface, if this interface becomes Up and the remote interface becomes Down after the negotiation, run the shutdown and undo shutdown commands on the remote interface or run the undo speed auto-negotiation and speed auto-negotiation commands on this interface to enable the two ends to negotiate their rate again.
• The last four GE optical interfaces of the S5720-36PC-EI, S5720-56PC-EI, S5720-32P-EI, and S5720-52P-EI do not support this command.
• The last four GE optical interfaces of the S5720S-28P-SI, S5720S-52P-SI, S5720-28P-SI, and S5720-52P-SI do not support this command.