Verifying the Central Site

As explained previously, Cisco recommends using its 3600 series routers (XM) for the central
site, although other platforms are also available. Therefore, the following text focuses on the
verification steps for installation of the 3600 platform.
Figure 22.2 shows the front of the 3600 router (in this case, it is a 3640 router). As you will
notice, the router is fairly limited in the amount of diagnostic information it can provide. LEDs
are limited in the same way that idiot lights are more limited than gauges in an automobile: They
can alert you when there is a problem, but full instrumentation (in a car this would include
gauges and a tachometer) can provide details and advanced warning. However, it is a good
place to start the process of troubleshooting, just as an oil warning light in the car helps you
eliminate the brakes as a problem area.