Case Study: Which Area Should This Network Be In?
Sometimes you may find that a given remote router has been, or needs to be, dual-homed to routers in different areas, as shown in Figure 5-12.
Figure 5-12. Remote Dual-Homed into Two Different Areas
When dual homing a remote site to two routers in different areas, you need to decide which area to put each link in. Begin by putting the serial link between Routers D and B in area 1 and the serial link between Routers D and C in area 2; these changes are illustrated in Figure 5-13. Now that you have those two down, you still have one small enigma to handle: Which area do you put the remote Ethernet ...