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Chapter 6
Edit Interface/Connection
Backup Configuration
Enable Backup
Primary Interface
Tracking Details
OL-4015-12
ISDN BRI and analog modem interfaces can be configured to work as backup
interfaces to other, primary interfaces. In that case, an ISDN or analog modem
connection will be made only if the primary interface goes down for some reason.
If the primary interface and connection go down, the ISDN or analog modem
interface will immediately dial out and try to establish a connection so that
network services are not lost.
Check if you want this ISDN BRI or analog modem interface to act as a backup
connection. Uncheck this check box if you do not want the ISDN BRI or analog
modem interface to be a backup interface.
Choose the interface on the router that will maintain the primary connection. The
ISDN BRI or analog modem connection will only be made should the connection
on the chosen interface go down.
Use this section to identify a specific host to which connectivity must be
maintained. The router will track connectivity to that host, and if the router
discovers that connectivity to the host specified was lost by the primary interface,
this will initiate a backup connection over the ISDN BRI or analog modem
interface.
Hostname or IP Address to be Tracked
Enter the hostname or IP address of the destination host to which connectivity will
be tracked. Specify an infrequently contacted destination as the site to be tracked.
Track Object Number
This is a read-only field that displays an internal object number generated and
used by Cisco SDM for tracking the connectivity to the remote host.
Cisco Router and Security Device Manager 2.5 User's Guide
Backup Configuration
6-59
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Troubleshooting
