| [ LiB ] |   |
Practical Exercise 6-2: ISDN as a Backup
This configuration demonstrates the use of an ISDN BRI line to back up a leased-line connection, as shown in Figure 6-8. The backup interface command places the specified interface in standby mode until the primary interface fails.
Figure 6-8. DDR Backup Using BRIs and the backup interface Command
This configuration also uses the Open Shortest Path First (OSPF) routing protocol between the two routers. As soon as the backup connection is activated, you must ensure that the routing table is updated to use the new backup route.
| [ LiB ] | |