Compaq SC RMS Server User Manual


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Introduction
Figure A.1: A 2-Stage, 16-Node, Switch Network
Plane0
Plane3
TopSwitches
Level1
Level2
Level0
Uplinks
Network Adapters
Netid0
Netid15
The level is the index of the stage, starting with 0 at the top. Note that in a 2-stage
switch network the Elans are at level 2. Each component has a network ID that
describes how to reach it from the top of the network. The plane is the index of switches
that have the same switch network ID. The interconnection of a 3-stage (64-node) switch
network is shown in
Figure A.2.
Figure A.2: A 3-Stage, 64-Node, Switch Network
Plane15
Plane0
TopSwitches
Uplinks
Plane0
Plane0
Plane0
Plane0
Plane0
Plane3
Plane3
Plane3
Plane3
Netid0
Netid48
Netid63
Netid16
Netid32
Level0
Level1
Level2
Level3
The 3-stage switch network is composed from four 2-stage networks. Each 2-stage
network connects sixteen nodes and has sixteen free uplinks. These uplinks connect the
four 2-stage networks to an additional level of switches to form a 3-stage network,
connecting up to 64 nodes.
A-2 Compaq AlphaServer SC Interconnect Terms
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