HP Onboard Administrator - Manual (Page 90)

Rack View 90
Location Discovery Services is a rack U location discovery solution for G3 and later racks. It enables HP iLO,
BL Onboard Administrator, and SL Chassis firmware to report and display the rack ID and the server U
position in the rack. Supported racks are programmed with unique U values in 7U and/or 8U modules, and
are installed with the tag version number, rack identifier, part number, product name, rack height, and U
position. Location Discovery Services supports 14U, 22U, 36U, 42U, and 47U racks.
The rack device reads the rack U location tag each time iLO receives AC power or iLO is reset. The U position
value denotes the U position read by the device. The contact position offset is a fixed value for each model
that indicates the position of the contact relative to the bottom U position of the device. It is normally 0, but
can be a positive value if the contact cannot be placed at the bottom U position of the device. The
bottom-most U position occupied by the device is calculated by subtracting the U offset from the U position.
You can view the discovered data in certain Onboard Administrator screens, such as the Rack Information
table in the Enclosure Information tab. In addition, several Onboard Administrator CLI commands display the
discovered data, such as the SHOW ENCLOSURE INFO and SHOW TOPOLOGY INFO commands. For more
information on these commands, see the HP BladeSystem Onboard Administrator Command Line Interface
User Guide.
Topology modes
Onboard Administrator supports three topology modes which are determined by the selection made on the
sign in screen prior to signing in. The three topology modes are:
• Local Mode—Used to manage a single enclosure when more than one enclosure can be selected.
Onboard Administrator ignores all topology changes. This mode is useful when you do not want to
change topology by adding linked enclosures.
• Linked Mode—Used to manage a single enclosure when no other enclosures are attached. You can use
Linked Mode to allow the addition of new enclosures as they are added to the interlink. As long as no
new enclosures are connected, Onboard Administrator appears to be in Local Mode. All topology
changes that occur while signed in are displayed by Onboard Administrator. This mode provides an
unrestricted view of enclosures connected to the interlink.
• Fixed Mode—Used to manage more than one, but not all enclosures. Only the topology changes
affecting the current topology are displayed by Onboard Administrator. This mode is useful when
monitoring a subset of the total enclosures connected to the interlink.
If the active mode is set for a single enclosure and one or more enclosures are connected, if you want to
ensure that the additional enclosures are not visible in the enclosure topology, you must sign out and back in
without selecting a linked enclosure.