Watch your console session on the
Orlando router to see what happens to the BRI interface.
What happened?

Once the link comes up, wait a few moments for IGRP to learn the new
routes.
Look at the routing table on the
Orlando router. What do you notice?


Look at the status of the dial backup
link with the show backup command to make sure you are in overload
mode.
What do you see?

Check the bandwidth values on the
dialer 1 interface and the Frame Relay serial interface. What do you
notice?

What problem will this cause?

We can tweak how IGRP looks at routes
using the variance command. This command allows you to specify a
multiplier to calculate acceptable metric values.
Configure a variance of 4 on both the
Atlanta and Orlando routers:
Orlando(config)#router igrp 100
Orlando(config-router)#variance 4
Atlanta(config)#router igrp 100
Atlanta(config-router)#variance
4
Do a clear ip route * command on both routers, create traffic to
bring up the line again, and check the route table.
What do you see now?
