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7017 6300–005 7–1
Section 7
Connecting Other Host Systems
Table 7–1 lists guidelines for connecting other host systems via the I/O subsystem.
Table 7–1. Guidelines for Connecting Other Host Systems
Area Rule/Recommendation
Software level The system software must be at or higher than the level specified in the I/O
Configuration Guide for the specific I/O subsystem being configured.
Shared components
•
Must be configured, strapped, and named in accordance with the most
restrictive requirements of any connected system.
•
Must be accurately reflected in the system configuration files of all
connected systems.
DLP access (migration
only)
•
DLPs must be qualified on all connected systems.
•
DLPs must be at or higher than the level specified in the I/O
Configuration Guide for the specific DLP subsystem being configured.
•
The configuration must conform to the symmetrical LEM rule (see the I/O
Configuration Guide for details).
RFI considerations, other
host connections
Connection considerations:
•
The connection to a second host's DLPs via MLI must use a maximum
50-foot external cable length and possibly a LEM.
•
The 50-foot restriction on cable length limits the physical separation
between cabinets sharing MLI interconnecting cables to approximately
44 feet.
•
Cabinets connected via MLI cables must share the same grounding grid.
Burst rate considerations:
•
Direct connection: 6 MB per second or greater
•
LEM connection: Approximately 3 to 3.5 MB per second
•
Burst rate approximately 40 to 50 percent lower when transferring data
across LEM connection