26-127 IRF ConfigurationAmong Switch 4210G series switches, Switch 4210G 24-Port, Switch 4210G 48-Port, Switch 4210GPWR 24-Port, and Switch 4210G PWR 48-Port switches support IRF.When configuring IRF, go to these sections for information you are interested in:z IRF Overviewz IRF Working Processz IRF Configuration Task Listz IRF Configurationz Logging In to an IRFz Displaying and Maintaining IRFz IRF Configuration ExamplesIRF OverviewIntroductionIntelligent Resilient Framework (IRF) allows you to build an IRF, namely a united device, byinterconnecting multiple devices through IRF ports. You can manage all the devices in the IRF bymanaging the united device.In an IRF, every single device is an IRF member, and plays one of the following two roles according toits function:z Master: A member device. It is elected to manage the entire IRF. An IRF has only one master atone time.z Slave: A member device. It is managed by the master and operates as a backup of the master. Inan IRF, except for the master, all the other devices are the slaves.For details of role election, refer to Role Election.Application and AdvantagesTypically, you can use an IRF in the distribution layer; and you can also apply it in the access layer. AnIRF is a single logical device to the users and devices of the upper layer and lower layer, as shown inFigure 27-1.
