Operation Manual – IRF FabricH3C S5600 Series Ethernet Switches Chapter 1 IRF Fabric Configuration1-2Figure 1-2 Port connection mode for S5600 series ring topology IRF fabricIRF fabric also supports bus topology, which has the same requirements as the ringtopology. The difference is that each of the switches across the bus connection isconnected with the other switches through only one fabric port, as shown in Figure 1-3.Figure 1-3 Network diagram for IRF fabric with a bus topologyII. Fabric portsOn an S5600 series Ethernet switch, only the two cascade ports on its rear panel canbe configured as the fabric ports. The two cascade ports are:z UP port: Cascade 1/2/1z DOWN port: Cascade 1/2/2III. FTMAs the basis of the IRF function, the Fabric Topology Management (FTM) programmanages and maintains the entire topology of a fabric.With fabric ports configured, the FTM program releases device information of thedevice through the fabric ports. The device information includes Unit ID, CPU MAC,device type ID, fabric port information, and all fabric configuration information. Thedevice information is released in the discovery packet (DISC).After receiving the packet, the peer device will analyze the packet. A device can form afabric with the peer or join a fabric only when the following conditions are met.
