IBM SG24-4817-00 - Manual (Page 144)

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7.1.4 Configuring a Local Multi-Switch Network for CIP
In this scenario, we add another 8285 to our network, representing perhaps a
departmental work group on a different floor. To accommodate the new
high-speed connection, we add an 8285 Expansion Chassis to our base
configuration. Now our network diagram looks like the following:
Figure 40. Multi-Switch CIP Network - Physical View
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ATM Workgroup Solutions: Implementing the 8285 ATM Switch