Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 608
Backbone-to-edge routing with Virtual Fabrics,
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24 FC-FC routing and Virtual Fabrics Edge fabric Fabric 128 SW5 SW1 E SW3 E Edge fabric Fabric 15 SW7 Backbone fabric Fabric 8 EX EX SW4 SW8 SW2 Fabric 1 SW6 FIGURE 83 Logical representation of EX_Ports in a base switch Backbone-to-edge routing with Virtual Fabrics Backbone-to-edge routing is not supported in the base switch, unless you use a legacy FC router. A legacy FC router is an FC router configured on a Brocade 7500 switch. Base switches can participate in a backbone fabric with legacy FC routers. You cannot connect devices to the base switch because the base switch does not allow F_Ports. You can, however, connect devices to the legacy FC router, thus enabling backbone-to-edge routing. If you connect a legacy FC router to a base switch, you must set the backbone FID of the FC router to be the same as that of the base switch. In Figure 82, no devices can be connected to the backbone fabric (Fabric 8) because base switches cannot have F_Ports. Figure 84 shows an FC router in legacy mode connected to a base switch. This FC router can have devices connected to it, and so you can have backbone-to-edge routing through this FC router. In this figure, Host A in the backbone fabric can communicate with device B in the edge fabric with FID 20; Host A cannot communicate with device C, however, because the base switches do not support backbone-to-edge routing. 608 Fabric OS Administrator's Guide 53-1002745-02
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