Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 Fundamental Ethernet Interface
Configuration Commands
3Com Corporation
2-5
By default, the Ethernet interface is working in auto-negotiation mode.
Connected to a hub, the Ethernet interface on a router must be specified to work in
half-duplex mode. Connected to a network device supporting full-duplex, a LAN Switch
for example, it must be specified to work in full-duplex mode, however.
Note that FE and GE electrical interfaces can support both full-duplex and half-duplex,
whereas FE and GE optical interfaces can only work in full-duplex mode.
Before setting the Ethernet interface to work in auto-negotiation mode, you must make
sure that the connected remote end has been working in auto-negotiation mode. If this
cannot be guaranteed, the two parties are recommended to use the forced setting for
the consistency in operating mode.
Related command: speed, display interface.
Example
# Set the Ethernet interface to work in full duplex.
[3Com -Ethernet0/0/0] duplex full
2.1.3 flow-control
Syntax
flow-control
undo flow-control
View
Ethernet interface view
Parameter
None
Description
Use the flow-control command to enable flow control on the Ethernet interface, which
is useful only when the peer end also supports flow control.
Use the undo flow-control command to restore the default.
By default, flow control is disabled.
When using this command, keep the configuration the same as that of the peer end.
Example
# Enable flow control on GE interface 0/0/0.
<3Com > system-view
[3Com ] interface gigabitethernet 0/0/0
[3Com -GigabitEthernet0/0/0] flow-control negotiation