Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 Fundamental Ethernet Interface
Configuration Commands
3Com Corporation
2-9
Parameter
10: Forces the Ethernet interface to work at 10 Mbps.
100: Forces the Ethernet interface to work at 100 Mbps.
1000: Forces the Ethernet interface to work at 1000 Mbps (only applied to GE
interfaces).
negotiation: Sets the Ethernet interface to work in auto-negotiation mode.
Description
Use the speed command to set the operating speed of the Ethernet interface.
Use the undo speed command to restore the default operating speed of the Ethernet
interface.
By default, the Ethernet interface is working in auto-negotiation mode.
Before setting the Ethernet interface to work in auto-negotiation mode, make sure that
the connected end is working in auto-negotiation mode. If you cannot make sure,
manually set the same operating mode at the two ends.
You can set the rate of FE electrical interface to 10 Mbps, 100 Mbps or auto-sensing
and the rate of GE electrical interface to 10 Mbps, 100 Mbps, 1000 Mbps or
auto-sensing. Nevertheless, the rate of FE optical interface is fixed to 100Mbps and the
rate of GE optical interface is fixed to 1000Mbps, which cannot be changed by using
commands.
 Note:
As for GE electrical interface, the operating rate of 1000Mbps and the mode of
half-duplex are mutually exclusive. Do not set these two values at the same time.
Related command: duplex, display interface.
Example
# Set the FE interface to work in 10Base-T mode.
[3Com -Ethernet0/0/0] speed 10