CLI Guide

Layer 2 Switching Commands 436
Syntax
speed {10 | 100 | 1000 | 10000 | 25000 | 40000 | { auto [ 10 | 100 | 1000 |
2500 | 5000 | 10000 | 25000 | 40000 [10 | 100 | 1000 | 2500 | 5000 |
10000| 25000 | 40000] … } }
no speed
• auto—Enable the port for auto-negotiation.
• 10—Enable the port for 10 Mbps operation.
• 100—Enable the port for 100 Mbps operation.
• 1000—Enable the port for 1 Gbps operation.
• 2500—Enable the port for 2.5 Gbps operation.
• 5000—Enable the port for 5 Gbps operation.
• 10000—Enable the port for 10 Gbps operation.
• 25000—Enable the port for 25 Gbps operation.
• 40000—Enable the port for 40 Gbps operation.
Default Configuration
Auto-negotiation is enabled by default on copper ports and SFP ports.
Command Mode
Interface Configuration (Ethernet) mode
User Guidelines
Not all interfaces are capable of supporting all speeds. Refer to the Hardware
Overview section of the Users Configuration Guide for a description of the
capabilities of a particular interface.
Use the auto parameter to enable auto-negotiation on an interface. Auto-
negotiation on copper interfaces selects a clock master, performs link training
to tune the pre-emphasis settings to the individual switch and cable,
negotiates the internal media, and may enable a decision feedback equalizer
(DFE) to correct burst errors if the PHY has the capability. To disable auto-
negotiation on a port, it is necessary to enter the speed command without
using the auto parameter. Disabling auto-negotiation on 1G copper ports
may lead to random frame loss as the clock master and media have not been