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Chapter 2 SES Concepts
Introduction
This chapter uses generic terms to describe enclosure services and speciļ¬c SES
implementation. SES instances can be distributed inside and outside of the Fabric to any
enclosure capable of supporting enclosure services through an SES device.
SES is distributed transparently throughout the Fabric, with an instance of a distributed SES
Device (SESD) on each switch as shown in Figure 2-1.
Figure 2-1 SES Distribution

SES Functional Model

Each instance may be accessed by an SES Application Client by specifying the associated
unique LUN. See Figure 2-2 for information on LUN addressing. SES implementation also
provides an SES Application Client an in-band mechanism for managing any Fabric switch
that it is attached to.
Figure 2-2 shows the SES functional model.