Reference Guide

Interfaces | 449
For 10/100/1000 Ethernet interfaces, the negotiation auto command is tied to the speed command.
Auto-negotiation is always enabled when the
speed command is set to 1000 or auto. In FTOS, the
command
speed 100 is an exact equivalent of speed auto 100 in IOS.
To discover whether the remote and local interface require manual speed synchronization, and to manually
synchronize them if necessary, use the following command sequence as shown in the second example:
FTOS#show interfaces status
Port Description Status Speed Duplex Vlan
Gi 0/0 Up 1000 Mbit Auto --
Gi 0/1 Down Auto Auto 1
Gi 0/2 Down Auto Auto 1
Gi 0/3 Down Auto Auto --
Gi 0/4 Force10Port Up 1000 Mbit Auto 30-130
Gi 0/5 Down Auto Auto --
Gi 0/6 Down Auto Auto --
Gi 0/7 Up 1000 Mbit Auto 1502,1504,1506-1508,1602
Gi 0/8 Down Auto Auto --
Gi 0/9 Down Auto Auto --
Gi 0/10 Down Auto Auto --
Gi 0/11 Down Auto Auto --
Gi 0/12 Down Auto Auto --
[output omitted]
In the example above, several ports display “Auto” in the Speed field, including port 0/1. In the following
example, the speed of port 0/1 is set to 100Mb and then its auto-negotiation is disabled.
FTOS#configure
Step Task Command Syntax Command Mode
1 Determine the local interface status. Refer
to the example below.
show interfaces [interface | linecard
slot-number] status
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.
config
EXEC Privilege
4 Access the port. interface interface slot/port CONFIGURATION
5 Set the local port speed. speed {10 | 100 | 1000 | auto} INTERFACE
6 Optionally, set full- or half-duplex. duplex {half | full} INTERFACE
7 Disable auto-negotiation on the port. If the
speed was set to 1000, auto-negotiation
does not need to be disabled.
no negotiation auto
INTERFACE
8 Verify configuration changes.
show config
INTERFACE
Note: The show interfaces status command displays link status, but not administrative status. For link and
administrative status, use show ip interface [interface | brief | linecard slot-number] [configuration].