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Configuring Dial Backup

Dial backup allows one or more dialer interfaces to be configured as the backup link for the primary serial interface. The backup dialer interfaces are activated only when the primary interface fails. ISDN backup connectivity is supported on all interfaces except ls-0/0/0.

To configure a primary interface for backup connectivity:

  1. Navigate to the top of the interfaces configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 50.
  3. If you are finished configuring the router, commit the configuration.
  4. Go on to any of the following optional tasks:
  5. To verify that the network interface is configured correctly, see Verifying the ISDN Configuration.

Table 50: Configuring an Interface for ISDN Backup

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

  1. In the configuration editor hierarchy, select Configuration>View and Edit>Edit Configuration.
  2. Next to Interfaces, click Edit.

From the top of the configuration hierarchy, enter

edit interfaces fe-0/0/0 unit 0

Select the physical interface for backup ISDN connectivity.

  1. In the Interface name column, click the physical interface name.
  1. Under Unit, in the Nested Configuration column, click Edit.

Configure the backup dialer interface—for instance, dl0.0.
  1. Next to Backup options, click Configure.
  2. In the Interface box, type dl0.0.
  3. Click OK until you return to the Interfaces page.

Enter

set backup-options interface dl0.0

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