You can change the metric anywhere up to 128. Changing a variance value enables EIGRP to install
multiple, loop-free routes with unequal cost in a local routing table. So basically, if the variance is set to
1, only routes with the same metric as the successor will be installed in the local routing table. And, for
example, if the variance is set to 2, any EIGRP learned route with a metric less than two times the
successor metric will be installed in the local routing table (if it is already a feasible successor).
Now’s a great time for us to check out some debugging outputs. First, let’s use the debug eigrp packet
command that will show our Hello packets being sent between neighbor routers: