Indications Of Backup Link Activation - HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual

Backup Links
Indications of Backup Link
Activation
When the primary link fails ("n" consecutive test packet responses were
not received on the primary port from the other hub), the backup link is
automatically enabled. The effect of this change is displayed on the
monitoring hub's LEDs and management interface. Activation of the
backup link does not change the status of any of the ports on the remote
hub.
On the hub's LEDs, the primary port LED goes off, and the backup port
LED goes on.
On the HP Stack Manager's front panel display for the hub, the status of
the primary port changes from ON to OFF, and the backup port changes
from OFF to ON.
On HP Interconnect Manager, you can automatically monitor the status
of the backup link from the network management station. See your HP
Interconnect Manager documentation for more information.
On the ASCII terminal STatus command display, the primary port
(labeled pri) changes from ON to OFF, and the backup port (labeled
bkup) changes from OFF to ON.
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