Specifications

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CHAPTER 3: Installation and Preconfiguration
3.4.3.C Ring
With daisychained 4-User models, use a ring arrangement if you have user stations
attached to three or four ServSwitch Affinity units and you want all of your users to
have access (or at least potential access) to all CPUs. Because it interlinks the first
and last Affinity units instead of making them the endpoints—which allows any
user to reach any CPU—a typical ring configuration requires one more pair of
Expansion Cables than the bus topologies do.
To use this topology, you’ll need to remove the RING/BUS jumper on two of
your Expansion Cards; see Section E.3 of Appendix E.
Figure 3-12 shows a 4-User system arranged in a ring.
Figure 3-12. 4-User models in a ring topology.
With daisychained 8-User and 16-User models, use the ring topology if your users
are dispersed among several Affinity units and you want them all to have access to
all of your CPUs. (Be very careful how you set user-port numbering in this
topology.) As with the 4-User models, you’ll need to remove the RING/BUS
jumper on two of your Expansion Cards; see Section E.3 of Appendix E.
Figures 3-13 and 3-14 on the next page show an 8-User ring and a 16-User ring.
Unit 3:
CPUs 33 to 48
User “KVM 4” (Slot 4)
User “KVM 3” (Slot 3)
User “KVM 2” (Slot 2)
User “KVM 1” (Slot 1)
Unit 2:
CPUs 17 to 32
Unit 1:
CPUs 1 to 16
All users can access all CPUs