Allied Telesis AT-S63 - Manual (Page 126)

Chapter 6: Port Parameter Commands
126 Section I: Basic Operations
Down - The port and the end node have not established a link.
unknown - The port status is unknown.
ˆ ifLinkUpDownTrapEnable - Whether or not link traps have been
enabled for the port, one of the following:
Enabled - Link traps are enabled. To disable link traps, see “DISABLE
INTERFACE LINKTRAP” on page 107.
Disabled - Link traps are disabled. To enable link traps, see “ENABLE
INTERFACE LINKTRAP” on page 110.
Example
The following command displays information about port 21:
show interface=21