IBM RS/6000 SP, Handbook

Page: 195 / 480

Chapter 5. The Switch
171
5.7.2 Switch-to-switch cabling
The issues that you must consider when planning switch cable connections
between switch-equipped frames in multi-switch SP systems include:
1. Determining the quantity of cables required
2. Determining the length of required cables
3. Minimizing cable lengths to reduce latency
4. Placing cables to reduce noise from other switch cables and ac sources
5. Making certain that your raised floor is high enough to contain all cables
6. Placing cables so that cooling air flow is unrestricted through raised floor
space
7. Labeling and laying cables in an orderly manner, to allow for improved
maintenance and reduced risk of mechanical failure
8. Placing cables and frames to allow for system growth
In SP systems with single-stage switching, each switch must be cable-connected
to every other switch. You must determine the switch-cable lengths and
quantities required for each of these connections.