ClearCube R Series Pentium 4 - Manual (Page 67)

ClearCube Product Manual and Installation Guide Cage and Blade Installation • 57
Direct Connect BackPack
Configuration of the Direct Connect BackPack (DCBP) only requires connection of the
Ethernet network to the primary Cage (with installed RMC). The Ethernet connection is
made via the CONTROL IN RJ-45 connector on the BackPack, indicated in green. The
primary Cage is then daisy-chained to the secondary Cages by connecting the
CONTROL OUT connector on the primary Cage to the CONTROL IN connector on the
secondary Cage. All control connectors and cables are indicated with a green color.
The daisy chain is continued in this fashion to connect as many as 14 Cages in a single
rack or cabinet. Note that the LEDs in the CONTROL section indicate whether an RMC
is installed or not (ENET indicates an RMC is installed. RS-485 indicates an RMC is
not installed).
Other than the management bus connection, the Direct Connect BackPack requires
no further hardware configuration.
Connecting the Cables
This section provides an overview of inter-cage connections for BackPacks.
NOTE: If you choose to use pre-assembled cables, be sure that the cables for the
desktop employ and terminate all four twisted pairs. Standard Ethernet works
with only two of the four pairs connected, but the ClearCube C/Port operates
only when all four pairs of wire are used.
The BackPacks link the Blades within each Cage to their respective user ports and to
control signals. In addition to the user port connections, three signal paths are
provided:
• Control Chain – The RS-485-based control and management chain between
Cages. A Control Chain contains one Primary controller—either an RMC or an
RMM. When an RMC is present in a Control Chain, it always asserts itself as
Primary, and RMMs on the chain all serve as Tertiary controllers. A Control Chain
can contain as many as 14 Cages.
• Admin Daisy Chain – The link between an Admin C/Port and the Cage or Cages
served by that Admin C/Port. An Admin Daisy Chain can connect from 1 to 14
SPARE IN Red
The SPARE IN connection is connected to the Spare Blade in the same Cage, or to the SPARE
OUT connection on a BackPack in an adjacent Cage.
RS-485 OUT Green
This connection passes the control and management signals on to the BackPack on the next
Cage when daisy-chaining multiple BackPacks.
CONTROL IN
(RS-485 or
E-NET)
Green
When an RMC is installed, making this the Primary Cage, this port is an Ethernet connection. In
this case, the E-NET indicator is lit. When an RMC is not installed, this port is an RS-485
connection that connects to the RS-485 OUT port of an adjacent Cage. In this case, the
RS-485 indicator is lit.
ETHERNET Gray
These are the 10/100 Ethernet connections for each of the PC Blades in the Cage. These
signals are direct connections and are not switched. Most configurations connect these signals
directly to an Ethernet switch or hub. Note that the numbers match the Blade slot numbers on
the front of the Cage.