Identifying The Backup Link - HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual

4. Complete the network cable connections between the monitoring
hub and the remote hub. (For instructions, see "Port Connections" in
chapter 1, "Installing the HP AdvanceStack 10Base-T Hubs".)
5. Enable the primary port with the HP Stack Manager's Port function.
This step is necessary because until you have completed step 3
(connecting the cables), the test packets cannot be successfully sent
through the primary port. The primary port will therefore be disabled
and the backup port will be activated. Once you enable the primary
port, it assumes the active role.
6. On the remote hub, make sure that the ports connected to both the
primary and backup links are enabled. On the monitoring hub, the
status of the primary and backup ports is controlled by the hub's
firmware; you do not need to explicitly enable the monitoring hub's
ports.

Identifying the Backup Link

The ports designated as the primary and backup ports are identified in:
the HP Stack Manager's Backup function window.
HP Interconnect Manager. (See the that product's documentation for
more information.)
ASCII console interface by using the BAckup command
The primary port is identified by (pri), the backup port by (bkup).
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Backup Links
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