Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 296)

e) (Optional ) Configure the logical switch to use XISLs, if it is not already XISL-capable. See
Configuring a logical switch for XISL use on page 293 for instructions.
By default, newly created logical switches are configured to allow XISL use.
f) Repeat step a through step e in all chassis that are to participate in the logical fabric, using
the same fabric ID whenever two switches need to be part of a single logical fabric.
5. Enable all logical switches by entering the switchEnable command on each logical switch that you
created in step 4 (the base switches are already enabled).
The logical fabric is formed.
You can use the fabricShow command to display all logical switches configured with the same fabric
ID as the local switch and all non-Virtual Fabrics switches connected through ISLs to these logical
switches.
You can use the switchShow command to display logical ports as E_Ports, with -1 for the slot and the
user port number for the slot port.
Managing Virtual Fabrics
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