3Com Switch 7750 Configuration Guide

174 CHAPTER 22: PORT BASIC CONFIGURATION
Configuring Port
Auto-Negotiation Speed
You can configure an auto-negotiation speed for a port by using the speed auto
command.
Take a 10/100/1000 Mbps port as an example.
■ If you expect that 10 Mbps is the only available auto-negotiation speed of the
port, you just need to configure speed auto 10.
■ If you expect that 10 Mbps and 100 Mbps are the available auto-negotiation
speeds of the port, you just need to configure speed auto 10 100.
■ If you expect that 10 Mbps and 1000 Mbps are the available auto-negotiation
speeds of the port, you just need to configure speed auto 10 1000.
Table 106 Duplex mode setting for an Ethernet port
Port type Duplex mode setting
100 Mbps electrical Ethernet port It can work in full-duplex mode, half-duplex
mode or auto-negotiation mode as required.
Gigabit electrical Ethernet port It can work in full-duplex mode, half-duplex
mode or auto-negotiation mode. However, if
the rate is set to 1000 Mbps, its duplex mode
can be set to full or auto.
100 Mbps optical Ethernet port It works in full-duplex mode and its duplex
mode can be set to full or auto.
Gigabit optical Ethernet port It works in full-duplex mode and its duplex
mode can be set to full or auto.
10,000 Mbps optical Ethernet port Its duplex mode can be set to full only.
Management port Its duplex mode cannot be set.
Table 107 Rate setting for an Ethernet port
Port type Rate setting
100 Mbps electrical Ethernet port Its rate can be set to 10 Mbps or 100 Mbps as
required.
Gigabit electrical Ethernet port Its rate can be set to 10 Mbps, 100 Mbps or
1000 Mbps as required. If its duplex mode is
set to full or half, its rate cannot be set to
1000 Mbps.
100 Mbps optical Ethernet port Its supports the rate of 100 Mbps. Its rate can
be set to 100 Mbps or auto.
Gigabit optical Ethernet port Its supports the rate of 1000 Mbps. Its rate
can be set to 1000 Mbps or auto.
10,000 Mbps optical Ethernet port Its rate can be set to 10,000 Mbps only.
Management port Its rate cannot be set.
Table 108 Configure auto-negotiation speeds for a port
Operation Command Remarks
Enter system view system-view -
Enter Ethernet interface view interface interface-type
interface-number
-