Technical data

Major Components
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Figure 2-10 CrayLink Interconnect, Xpress Link, and Crosstown Cables
Cautionary Guidelines
You generally should not handle the sensitive CrayLink Interconnect and Xpress link
cables; they are very delicate. Observe the following guidelines if you need to move these
cables:
• Avoid bending the cables more than a 1.25-inch radius.
• Avoid stepping on the cables.
• Avoid “hot plugging” in or removing cables while both server modules are up and
running. This can hang or crash the entire SGI 2400 or 2800 configuration.
Caution: Additional router cable connections should be performed only by Silicon
Graphics-certified personnel.
Xpress Links
The Xpress links provide greater system bandwidth, as they supply additional
1600 MB/sec routing paths. The Xpress links connect to Router board ports that are not
being used by the CrayLink Interconnect cables. For additional information on the use of
Xpress links, see Chapter 4, “System Configurations.”
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Crosstown cable CrayLink Interconnect and Xpress Links cable