Unisys NX5820 manual Guidelines for Connecting Other Host Systems

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	• DLPs must be qualified on all connected systems.
only)	• 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	Connection considerations:
host connections	• 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

7017 6300–005 7–1