Chapter 9: Enabling Backup to a Permanent Connection

Labs:

9.1.1 You have just installed an ISDN line to be used as a dial backup line to your Frame Relay connection between the Atlanta (hub) and Orlando (stub) office.  Configure DDR on the BRI interface of the Orlando router.  Configure Frame Relay on the serial interfaces connecting to the Frame Relay network.  Use floating static routes to control which link is used.
9.1.4.1

You have just installed an ISDN line to be used as standby reserve bandwidth your Frame Relay connection between the Atlanta and Orlando office.  Configure DDR on the BRI interface of the Orlando router.  Configure Frame Relay on the serial interfaces connecting to the Frame Relay network.  Configure parallel static routes so that when both links are up traffic will load balance between the two links.

9.1.4.2 You have just installed an ISDN line to be used as standby reserve bandwidth for your Frame Relay connection between the Atlanta and Orlando office.  Configure DDR using a dialer interface on the Orlando router.  Configure Frame Relay on the serial interfaces connecting to the Frame Relay network.  Configure this to work successfully with IGRP.  EIGRP could also be used.
9.2.3 You have been asked to implement a DDR dial backup link to backup the Frame Relay network between Orlando and Atlanta.  You have installed an ISDN line in Orlando to make this possible.  Now that Orlando has ISDN, you have come up with the idea to take advantage of that line so that you can connect to the Minneapolis office which also has an ISDN line.  Configure a DDR connection between Orlando and Minneapolis.  Because Orlando will be using the same line to connect to two different locations, you must use dialer profiles to make this possible.