Dell PowerConnect Brocade 300 Fabric OS Administrator's Guide v7.1.0 - Page 572
Fibre Channel routing concepts
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24 Fibre Channel routing concepts Fibre Channel routing concepts Fibre Channel routing introduces the following concepts: • Fibre Channel router (FC router) A switch running the FC-FC routing service. Refer to "Supported platforms for FC-FC routing" on page 570 for a list of platforms that can be FC routers. • 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 Fibre Channel over IP 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 by using an EX_Port or VEX_Port. • Backbone fabric A backbone fabric is an intermediate network that connects one or more edge fabrics. In a SAN, the backbone fabric consists of at least one FC router and possibly a number of Fabric OS-based Fibre Channel switches (refer to Figure 76 on page 575). • Inter-fabric link (IFL) The link between an E_Port and EX_Port, or VE_Port and VEX_Port, is called an inter-fabric link (IFL). You can configure multiple IFLs from an FC router to an edge fabric. Figure 74 shows a metaSAN consisting of three edge fabrics connected through a Brocade DCX with inter-fabric links. Host Edge fabric 1 E_Port Target Edge fabric 2 E_Port Target Edge fabric 3 E_Port Fibre Channel switch IFL IFL EX_Ports FC router FIGURE 74 A metaSAN with inter-fabric links Long distance IFL Fibre Channel switch 572 Fabric OS Administrator's Guide 53-1002745-02
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