Users Guide

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 EMC Networking recommends keeping auto-negotiation enabled. Only disable auto-
negotiation on switch ports that attach to devices not capable of supporting negotiation or where connectivity issues
arise from interoperability issues.
NOTE: If the interface does not come up when you configure 10/100/1000G speed, configure the interface speed using the
speed command manually on both the ends and disable autonegotiation if it is enabled.
Setting the speed to 10/100/1000 Mbps on SFP-1G-T transceiver
Dell EMC Networking OS allows you to disable the auto-negotiation on the SFP-1G-T transceiver connected interface and set
the speed manually to 10/100/1000 Mbps. You can disable the auto-negotiation using no negotiation auto command and
enable setting the interface speed using the speed command at the INTERFACE mode.
Setting the Speed of Ethernet Interfaces
To discover whether the remote and local interface requires manual speed synchronization, and to manually synchronize them if
necessary, use the following command sequence.
1. Determine the local interface status. Refer to the following example.
EXEC Privilege mode
show interfaces [interface | stack—unit stack-unit-number] status
2. Determine the remote interface status.
EXEC mode or EXEC Privilege mode
[Use the command on the remote system that is equivalent to the first command.]
3. Access CONFIGURATION mode.
EXEC Privilege mode
config
4. Access the port.
CONFIGURATION mode
interface interface-type
5. Set the local port speed.
INTERFACE mode
speed {10 | 100 | 1000 | 10000 | auto}
NOTE:
If you use an active optical cable (AOC), you can convert the QSFP+ port to a 10 Gigabit SFP+ port or 1 Gigabit
SFP port. You can use the speed command to enable the required speed.
6. Optionally, set full- or half-duplex.
INTERFACE mode
duplex {half | full}
7. Disable auto-negotiation on the port.
INTERFACE mode
no negotiation auto
If the speed was set to 1000, do not disable auto-negotiation.
8. Verify configuration changes.
INTERFACE mode
show config
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Interfaces