Reference Guide
656 | Interfaces
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When you configure a speed for the 10/100/1000 interface, you should confirm the 
negotiation auto command setting. Both sides of the link should have auto-negotiation either 
enabled or disabled. For speed settings of 1000 or auto, the software sets the link to 
auto-negotiation and you cannot change that setting.
In FTOS, the command 
speed 100 is an exact equivalent of speed auto 100 in IOS.
Related
Commands
speed (Management interface)
c e
z
Set the speed for the Management interface.
Syntax
speed {10 | 100 | auto}
To return to the default setting, use the 
no speed {10 | 100} command.
Parameters
Defaults
auto
Command Modes
INTERFACE
Command
History
Usage
Information
This command is found on the Management interface only.
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 
speed command. When the speed is set to 10 or 100 Mbps, the duplex 
command can also be executed.
duplex (10/100 
Interfaces)
Configure duplex mode on physical interfaces with the speed set to 10/100.
negotiation auto Enable or disable auto-negotiation on an interface.
10
Enter the keyword 10 to set the interface’s speed to 10 Mb/s.
100
Enter the keyword 100 to set the interface’s speed to 100 Mb/s.
auto
Enter the keyword auto to set the interface to auto-negotiate its speed.
Version 8.3.19.0 Introduced on S4820T.
Version 8.3.11.1 Introduced on Z9000.
Version 8.3.11.1 Introduced on S55, S60, and S4810.
Version 8.1.1.0 Introduced on E-Series ExaScale.
Version 7.5.1.0 Introduced on C-Series.
pre-Version 6.2.1.0 Introduced for E-Series.










