11Setting up an IRF fabricThis chapter guides you through the IRF fabric setup procedure.Hardware compatibilityAn SR6602-X router can form an IRF fabric only with SR6602-X routers. Other H3C SR6600 routers canform an IRF fabric with devices in the same series.General restrictions and configuration guidelinesFor a successful IRF setup, follow the restrictions and guidelines in this section and the setup procedurein "Setup and configuration task list."IRF fabric sizeAn SR6600 IRF fabric can contain a maximum of two chassis.Software requirementsAll IRF member devices must run the same software image version. Make sure the software auto-updatefeature is enabled on all member devices.MPU requirementsEvery IRF member must have a minimum of one MPU.IRF physical interface requirementsIRF physical interface locationOn SR6602-X routers, use the following ports for IRF links:• SR6602-X1—The four fixed GE ports.• SR6602-X2—The four fixed GE ports and the two fixed 10-GE ports.On SR6604, SR6608, SR6616, SR6604-X, SR6608-X, or SR6616-X routers, follow these guidelines whenyou select IRF physical interfaces:• You can use physical interfaces from a maximum of two modules in Table 2 for IRF links on amember device.Table 2 Candidate IRF physical interfacesModule Candidate IRF physical interfacesSR6604/SR6608/SR6616: