3
Basic concepts
Figure 2 IRF implementation schematic diagram (with two member switches)
Device A and Device B in Figure 2 form an IRF fabric, which has four MPUs (one active and three standby)
and two interface cards. The IRF fabric manages both the physical and software resources of Device A
and Device B.
An IRF fabric with four member switches is larger in scale: it has eight MPUs (one active and seven
standby) and four interface cards, as shown in Figure 3.