Port Backup - Allied Telesis AT-8400 Series Reference Manual

Fast Ethernet and Gigabit Ethernet Line Cards
LED
L/A

Port Backup

28
GBIC Slot LEDs
The GBIC slot LEDs are defined in Table 12.
Table 12 AT-8413 GB/T GBIC LED
State Description
OFF The GBIC port has not established a valid link with
its end node.
Steady Green The GBIC port has established a valid link with its
end node.
Flashing Green The GBIC port is transmitting and/or receiving
data packets.
The AT-8413 line card features port backup. This feature can prevent a
loss of connectivity between critical network devices should a link
between switches be disconnected or fail.
Port backup involves using both the twisted pair port on the line card
and installing a fiber optic or twisted pair GBIC module in the GBIC
expansion slot. You connect the two ports to another AT-8413 line card
in another AT-8400 Series switch, or to ports on another Ethernet switch.
The line card designates one port to provide the active link and disables
the other port. If the active link is lost, for instance, if the data cable is
disconnected, the backup port is activated.
Note
This feature is independent of Spanning Tree Protocol and Rapid
Spanning Tree Protocol. You do not need to activate spanning tree
to use this feature.