HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, December 2009)

214 Administering Advanced Zoning
Symmetrical segmentation occurs when both ends of an ISL are shut down. Subsequently, no frames are
exchanged between those two switches.
Asymmetrical segmentation not only prevents frames from being exchanged between switches, but also
causes routing inconsistencies.
The best way to avoid either type of segmentation is to know the zone database size limit of adjacent
switches. The following tables provide the expected behavior based on different database sizes after a
zone merge is specified.
Table 58 Resulting database size: 0 to 96K
Receiver
Initiator
Fabric
OS 3.1
Fabric
OS 3.2
Fabric OS
4.0/
4.1/
4.2
Fabric
OS 4.4.0
Fabric OS
5.0.0/
5.0.1/
5.1.0
Fabric
OS
5.2.0 or
later
Fibre
Channel
Router
XPath 7.3
Fabric OS 3.1 Join Join Join Join Join Join Join Join
Fabric OS 3.2 Join Join Join Join Join Join Join Join
Fabric OS 4.0/
4.1/4.2
Join Join Join Join Join Join Join Join
Fabric OS 4.4.0 Join Join Join Join Join Join Join Join
Fabric OS 5.0.0/
5.0.1/5.1.0
Join Join Join Join Join Join Join Join
Fabric OS 5.2.0 or later Join Join Join Join Join Join Join Join
FC router Join Join Join Join Join Join Join Join
XPath 7.3 Join Join Join Join Join Join Join Join
Table 59 Resulting database size: 96K to 128K
Receiver
Initiator
Fabric OS
3.1
Fabric OS
3.2
Fabric
OS 4.0/
4.1/4.2
Fabric
OS 4.4.0
Fabric OS
5.0.0/
5.0.1/
5.1.0
Fabric
OS 5.2.0
or later
Fibre
Channel
Router
XPath 7.3
Fabric OS 3.1 Segment Segment Segment Segment Segment Join Join Segment
Fabric OS 3.2 Segment Join Join Join Join Join Join Join
Fabric OS 4.0/
4.1/4.2
Segment Segment Join Join Join Join Join Join
Fabric OS 4.4.0 Segment Join Join Join Join Join Join Join
Fabric OS 5.0.0/
5.0.1
Segment Join Join Join Join Join Join Join
Fabric OS 5.2.0 or
later
Segment Join Join Join Join Join Join Join
FC router Segment Join Join Join Join Join Join Join
XPath 7.3 Segment Segment Join Join Join Join Join Join