Allied Telesis AT-S97 - Manual (Page 76)

Chapter 5: Port and Module Commands
76
ˆ The MissingLink mode is intended for situations where the ports of a
channel are connected to managed devices, such as managed Fast
Ethernet switches, that can react to the loss of a link and perform a
specific action, such as send out an SNMP trap or seek a redundant
path using a spanning tree protocol.
ˆ Allied Telesis does not recommend using the Smart MissingLink mode
on a channel connected to managed devices during normal operations
of the channel. As explained earlier, this mode pulses the transmitter
of a channel port when the link is lost on the companion port, which
might cause problems for a managed device.
ˆ The Link Test and Smart MissingLink modes are particularly useful
when troubleshooting a link failure on a channel port. These modes
allow you to use the Link LEDs on the ports and the SYSTEM SHOW
INTERFACE command to identify the port in the channel that cannot
establish a link with its network device.
Examples
This command sets all the channels on the media converter module in slot
1 to the Smart MissingLink mode. The chassis has the ID number 0:
system set interface id=0/1 opmode=sml
This command sets channel 6 (twisted pair port 6 and fiber optic port 6) on
the media converter module in slot 2 to the MissingLink mode. The
chassis has the ID number 0:
system set interface id=0/2/6 opmode=ml
This command sets channel 8 (twisted pair port 8 and fiber optic port 8) on
the media converter module in slot 1 to the Link Test operating mode. The
chassis has the ID number 31:
system set interface id=31/1/8 opmode=link-test