Brocade Communications Systems 53-1001763-02 사용자 설명서

Fibre Channel routing concepts

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Proxy devices

An FC router achieves inter-fabric device connectivity by creating proxy devices (hosts and targets) 
in attached fabrics that represent real devices in other fabrics. For example, a host in Fabric 1 can 
communicate with a target in Fabric 2 as follows:

•

A proxy target in Fabric 1 represents the real target in Fabric 2. 

•

Likewise, a proxy host in Fabric 2 represents the real host in Fabric 1. 

The host discovers and sends Fibre Channel frames to the proxy target. The FC router receives 
these frames, translates them appropriately, then delivers them to the destination fabric for 
delivery to the target. 

The target responds by sending frames to the proxy host. Hosts and targets are exported from the 
edge SAN to which they are attached and, correspondingly, imported into the edge SAN reached 
through Fibre Channel routing. 

 illustrates this concept.

FIGURE 71

MetaSAN with imported devices

Routing types

The FC-FC routing service provides two types of routing:

•

Edge-to-Edge
Occurs when devices in one edge fabric communicate with devices in another edge fabric 
through one or more FC routers.

•

Backbone-to-Edge
Occurs when FC routers connect to a common fabric—known as a backbone fabric—through 
E_Ports. A backbone fabric can be used as a transport fabric that interconnects edge fabrics. 
FC routers also enable hosts and targets in edge fabrics to communicate with devices in the 
backbone fabric, known as backbone-to-edge routing. From the edge fabric's perspective, the 
backbone fabric is just like any other edge fabric. For the edge fabric and backbone fabric 
devices to communicate, the shared devices must be presented to each other's native fabric. 

E_Port

E_Port

IFL

IFL

EX_Port