3Com Switch 7750 Configuration Guide Guide

Ethernet Port Configuration 167
Ethernet Port
Configuration
Initially Configuring a
Port
Pay attention to the following points when setting the duplex mode and rate of an
Ethernet port.
Table 96 Initially configure a port
Operation Command Description
Enter system view system-view -
Enter Ethernet port view
interface interface-type
interface-number
-
Enable the Ethernet port undo shutdown
Optional
By default, the port is
enabled.
Use the shutdown command
to disable the port.
Set the description of the
Ethernet port
description text
Optional
By default, no description is
defined for the port.
Set the duplex mode of the
Ethernet port
duplex { auto | full | half }
Optional
By default, the duplex mode
of the port is auto
(auto-negotiation).
Set the speed of the Ethernet
port
speed { 10 | 100 | 1000 |
10000 | auto }
Optional
By default, the speed of the
port is auto
(auto-negotiation).
Set the medium dependent
interface (MDI) attribute of
the Ethernet port
mdi { across | auto | normal
}
Optional
Be default, the MDI attribute
of the port is auto.
Allow jumbo frames to pass
through the Ethernet port
jumboframe enable [
jumboframe-value ]
Optional
By default, jumbo frames that
are larger than 1518 bytes
and smaller than 1536 bytes
are allowed to pass through
the port.
Table 97 Precautions in duplex mode setting
Port type Precautions in 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.