1-11 IRF ConfigurationThis chapter includes these sections:z Introduction to IRFz Basic Conceptsz Working Processz IRF Virtual Device Configuration Task Listz Switching Operating Modez Configuring an IRF Virtual Devicez Accessing an IRF Virtual Devicez Displaying and Maintaining an IRF Virtual Devicez IRF Virtual Device Configuration ExamplesIntroduction to IRFOverviewDeveloped by H3C, Intelligent Resilient Framework (IRF) provides a new method to connect multipledevices through physical IRF ports. Individual devices join to form a distributed device called IRF virtualdevice. IRF realizes the cooperation, unified management, and non-stop maintenance of multipledevices.z At present, the S7500E Series Ethernet Switches support an IRF virtual device of two members,which means you can use two S7500E series switches to form an IRF virtual device: one operatesas the master and the other operates as the slave.z At present, the S7503E, S7506E, S7510E and S7506E-V support IRF.AdvantagesIRF features the following advantages:z Streamlined management. When an IRF virtual device is established, you can log in to it byconnecting to any port of any member to manage all members of the IRF virtual device.z High reliability. An IRF virtual device comprises multiple member devices: the master runs,manages and maintains the IRF virtual device, whereas the slaves process services as well asfunctioning as the backups. As soon as the master fails, the IRF virtual device immediately elects anew master to prevent service interruption. In addition, not only the IRF links of members can beaggregated, but also the physical links between the IRF virtual device and the upper or lower layer