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Preliminary
Major Fibre Channel Port Features
SANbox-16HA Fibre Channel Switch
1-4 General Description 59005-03 Rev. A Installer’s/User’s Manual
Figure 1-2 shows a possible topology of a Segmented Loop. In this figure, there are
three distinct loop segments that have been linked (placed in the same segmented
loop zone) together by the Switch as a single Segmented Loop. This means that all
three loop segments share the same address space (same set of Arbitrated Loop
Physical Addresses (AL_PAs)). All devices on the Segmented Loop can see all
other devices as though they were attached to their local loop segment.
Figure 1-2 Segmented Loop Topology Example
Segmented Loop Features
• Switch management allows you to designate any or all ports on a SANbox-16
chassis as SL_Ports.
• SL_Ports connect to devices that conform to the Fibre Channel-Private Loop
SCSI Direct Attach (FC-PLDA) standard. If you place a Public Fibre
Channel device on an SL_Port it becomes a Private device and (like other
Private devices) cannot communicate off the loop.
• Each SL_Port can support up to 126 devices.
• Each SL_Port automatically discovers the devices connected to it.
• Switch management allows you to link up to 32 segments (SL_Ports)
together in the same segmented loop zone (even across multiple chassis in
the same fabric) to form a Segmented Private Loop. The aggregate total
number of devices in the linked SL_Ports must not exceed 126 devices and
all AL_PAs within the linked segments must be unique.
Private Loop
Segment
Hub
SL_Port
Private Loop
Segment
Private Loop
Segment
Hub
SL_Port
SL_Port
Hub
ST3
ST2
ST1
Switch
Server 3
Server 2