Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 4 Fundamental Logical Interface
Configuration Commands
3Com Corporation
3-7
3.1.8 loopback
Syntax
loopback
undo loopback
View
Ethernet port view
Parameter
None
Description
Use the loopback command to enable loopback on the Ethernet port for test purpose.
Use the undo loopback command to disable loopback on the Ethernet port.
By default, loopback is disabled.
Related command: display interface.
Example
# Enable loopback on port Ethernet 1/0/1.
[3Com -Ethernet1/0/1] loopback
3.1.9 mac-address timer aging
Syntax
mac-address timer aging {age-time | no-age }
undo mac-address timer aging
View
Ethernet port view
Parameter
age-time: Address aging time on the port, in the range 10 to 1000000 seconds. It
defaults to 300 seconds.
no-age: The MAC addresses are never aged out of the table on the port.
Description
Use the mac-address timer aging command to set the aging timer for the MAC
address table on the port.