Reference Guide

FIGURE 75 A metaSAN with inter-fabric links
∙ EX_Port and VEX_Port
An EX_Port and VEX_Port function similarly to an E_Port and VE_Port respectively, but terminate at the switch and do not
propagate fabric services or routing topology information from one edge fabric to another. Refer to the Fabric OS FCIP
Administrator's Guide for details about VE_Ports.
∙ Edge fabric
An edge fabric is a Fibre Channel fabric with targets and initiators connected through the supported platforms.
∙ Logical SANs (LSANs)
An LSAN is defined by zones in two or more edge or backbone fabrics that contain the same devices. You can create LSANs
that span fabrics. These LSANs enable Fibre Channel zones to cross physical SAN boundaries without merging the fabrics
while maintaining the access controls of zones.
An LSAN device can be a physical device , meaning that it physically exists in the fabric, or it can be a proxy device .
Figure 76 shows a metaSAN with a backbone consisting of one FC router connecting hosts in edge fabrics 1 and 3 with storage
in edge fabric 2 and the backbone fabric through the use of LSANs. Three LSAN zones allow device sharing between the
backbone fabric and edge fabric 1, between edge fabric 1 and edge fabric 2, and between edge fabric 2 and edge fabric 3.
Using FC-FC Routing to Connect Fabrics
Brocade Fabric OS Administration Guide, 8.0.1
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