Model 550 Sp Switch-8 Configuration; Model 550 Single-Stage Sp Switch And Sp Switch2 Configuration; Model 550 Two-Stage Sp Switch And Sp Switch2 Configuration - IBM RS/6000 SP Handbook

4.3.2 Model 550 SP Switch-8 configuration

This configuration consists of one to eight processor nodes mounted in one
required Model 550 frame equipped with an eight-port SP Switch-8 (F/C 4008). A
non-switched expansion frame (F/C 1550) is supported in this configuration only
if the model frame is filled before the total node count of eight is reached. In this
configuration, each node requires either an SP Switch Adapter (F/C 4020), an
SP Switch MX Adapter (F/C 4022), or an SP Switch MX2 Adapter (F/C 4023).
Nodes in the non-switched expansion frames share unused switch ports in the
model frame.
4.3.3 Model 550 single-stage SP Switch and SP Switch2
configuration
This configuration consists of 1 to 8 processor nodes mounted in one required
Model 550 frame equipped with a sixteen-port switch. Depending on the number
of nodes in your system, up to four switched expansion frames can be added to
the system.
Single-stage system configurations can also utilize non-switched expansion
frames. Nodes in the non-switched expansion frames share unused switch ports
both in the model frame and in the switched expansion frames.

4.3.4 Model 550 two-stage SP Switch and SP Switch2 configuration

The standard two-stage switch configuration has 65-128 processor nodes. No
more than 64 of the 128 nodes can be high nodes.
These nodes are mounted in one required Model 550 frame equipped with a
sixteen-port switch and in switched expansion frames. The switches in these
frames form the first switching layer.
This system configuration also requires a switch frame, which forms the second
switch layer. The second stage switches in the switch frame are used for
high-performance parallel communication between the switches mounted in the
model frame and in switched expansion frames. Switch traffic is carried through
concurrent data transmissions using the Internet Protocol (IP).
Two-stage switch system configurations can also utilize non-switched expansion
frames. Nodes in the non-switched expansion frames share unused switch ports
in the model frame and in switched expansion frames.
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Chapter 4. Frames