DELL S50V User Manual

Interfaces | 455

Setting speed and duplex mode of Ethernet Interfaces

By default, auto-negotiation of speed and duplex mode is enabled on 10/100/1000 Base-T Ethernet 
interfaces. Only 10GE interfaces do not support auto-negotiation. When using 10GE interfaces, verify that 
the settings on the connecting devices are set to no auto-negotiation. 

The local interface and the directly connected remote interface must have the same setting, and 
auto-negotiation is the easiest way to accomplish that, as long as the remote interface is capable of 
auto-negotiation.

Note: As a best practice, Dell Force10 recommends keeping auto-negotiation enabled. Auto-negotiation 
should only be disabled on switch ports that attach to devices not capable of supporting negotiation or 
where connectivity issues arise from interoperability issues.

For 10/100/1000 Ethernet interfaces, the 

 command is tied to the 

 command. 

Auto-negotiation is always enabled when the 

 command is set to 

 or 

. 

To discover whether the remote and local interface require manual speed synchronization, and to manually 
synchronize them if necessary, use the following command sequence (see 

Note: Starting with FTOS 7.8.1.0, when a copper SFP2 module with catalog number GP-SFP2-1T is used 
in the S25P model of the S-Series, its speed can be manually set with the 

 command. When the 

speed is set to 10 or 100 Mbps, the 

 command can also be executed.

1

Determine the local interface status. See 

 [

 | 

 

] 

EXEC Privilege

2

Determine the remote interface status.

[Use the command on the remote system 
that is equivalent to the above command.]

EXEC 
EXEC Privilege

3

Access CONFIGURATION mode.

EXEC Privilege

4

Access the port.

 

 

/

CONFIGURATION

5

Set the local port speed.

 {

 | 

 | 

 | 

}

INTERFACE

6

Optionally, set full- or half-duplex.

 {

 | 

}

INTERFACE

7

Disable auto-negotiation on the port. If the 
speed was set to 1000, auto-negotiation 
does not need to be disabled.

INTERFACE

8

Verify configuration changes.

INTERFACE