Cisco Systems OL-4015-08 Backup Configuration

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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Chapter4 Edit Interface/Connection
Backup Configuration
Backup Configuration
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.
Should 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.
Enable Backup
Check this check box if you want this ISDN BRI or analog modem int erface to act
as a backup connection. Clear this check box if you do not wa nt the ISDN BRI or
analog modem interface to be a backup interface.
Primary Interface
Select 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 selected interface go down.
Tracking Details
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 has been 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. Please 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 SDM for tracking the connectivity to the remote host.