clear config on the second switch (totally clean, so there were no alises/zones/configs on it) and connect it to the first switch.
clear config on the first switch and make the new zone configuration (for this particular switch).ensure that all switch IDs and domain IDs are different.disconnect all switches from each other.When a blank configuration switch is connecting to an existing SAN switch with configuration, the zoning configuration is automatically transferred and fabric is automatically formed. For this one switch can have existing configuration but other should be blank. Both the switches need to have exact same zoning configuration other wise they will not connect and single fabric will not form.In case of brocade command fabricshow would show only one fabric on both switches if connected properly via ISL. Initiators and targets are connected to F-ports. For connecting two SAN switches ISL (Inter Switch Link) needs to be formed over E-port.
A fabric can contain up to 239 domains, and in theory, the fabric can scale to about 16 million connections. Domain A 'Domain' is a single switch within a fabric. Fabric A 'Fabric' is the network that connects these nodes together, and includes the network switches. Node 'Node' is a server or a storage device. Some common terms that are used when talking about a SAN are: The most common type of Fibre Channel SAN today is a switched fabric. The steps have not been tested in lab or production. Home > Switch configuration > Connecting two SAN switches