Quadrics QsNetII Interconnect

Figure 3-3: Interconnect, Rear View with Slot Numbering
Slot 2
Slot 3
Slot 0
Slot 0
Slot 1
Slot 2
Fan A/CtrlA
Slot 3
Slot 1
FanA/Ctrl
A
HPTC-0028
3.2.3.2 Interconnect Configuration for Federated Clusters
For clusters with greater than 128 nodes, the interconnect enclosure is configured
as a node-level interconnect (NLI) or a top-level interconnect (TLI). These
configurations require different midplanes and combinations of QM501 and QM502
switch cards. Table 3-1 shows the midplane rules for TLI and NLI configurations.
Table 3-1: Federated Configurations, Midplane Rules
Level Midplane Description
NLI 3X-CS5A0-AF Fully populated with
connectors installed
TLI 3X-CM5A0-AN No link connectors installed
Each QM503 controller card has an Ethernet port for connection to the
management network. If these ports remain unconnected, the management
processes will be unable to report network state or errors to the management node.
In federated configurations, both QM503 controller cards operate from separate
redundant clock distribution boxes. Two RJ45 shielded cable connectors on each
QM503 provide external clock inputs for use in a federated network. External clock
port plugs must be fitted to unused external clock inputs.
_________________________ Note _________________________
Failure to fit the external clock plugs to unused inputs might result in
clock errors generated by noise on the internal clock signal.
128-Port Interconnect Modules 3-5