Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 Fundamental Ethernet Interface
Configuration Commands
3Com Corporation
2-6
2.1.4 force-link
Syntax
force-link
undo force-link
View
GE interface view
Parameter
None
Description
Use the force-link command to enable the GE interface to work in force mode.
Use the undo force-link command to restore the default operating mode.
The default operating mode is negotiation.
GE optical interfaces provide two operating modes: negotiation and force. In
negotiation mode, the interface chip checks negotiation code, negotiating the format of
the PAUSE frame and the peer state (that is, whether it is faulty). In force mode, no
negotiation stream is present on the line. The interface chip decides whether an
interface can be brought up depending on how much light intensity it reads.
You must set the two ends to work in the same operating mode. Any inconsistency can
prevent the interface adopting negotiation mode from going up.
Example
# Enable negotiation on the GE interface 0/0/0.
[Router-GigabitEthernet0/0/0] force-link
2.1.5 loopback (Ethernet/GE Interface)
Syntax
loopback
undo loopback
View
Ethernet interface view
Parameter
None