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Introduction 17

Figure 1-3. Direct-Attached Cluster

Switch-Attached Cluster

Switch

-attached clusters provide configuration flexibility, expandability, and

performance. In a

switch

-attached cluster, all of the nodes (server modules)

are attached to redundant switch fabrics. A

switch

-attached cluster supports

the following configurations:

• Up to two storage systems using embedded fibre channel switch modules

without external fibre channel switches

• Up to four storage systems using Ethernet switch modules, or embedded

fibre channel (switch or pass-through) modules connected to external fibre

channel switches

Figure 1-4 shows the switch-attached cluster connected to an external SAN

using switch modules.

Figure 1-5 shows the switch-attached cluster connected to an external SAN

using embedded pass-through modules.

Figure 1-6 shows the switch-attached cluster connected to an external SAN

using embedded switch modules.

NOTE: Figure 1-4 through Figure 1-6 are for illustration only. Some cluster connections

shown below are routed internally through the PowerEdge server enclosure.

public network

cluster node

pass-through module

private network

chassis connections

storage system

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