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Configuring Dialer Watch for USB Modem Dial Backup

Dialer watch is a backup method that integrates backup dialing with routing capabilities and provides reliable connectivity without relying on a dialer filter to trigger outgoing USB modem connections. With dialer watch, the device monitors the existence of a specified route and if the route disappears, the dialer interface initiates the USB modem connection as a backup connection.

In this example, you configure dialer watch to enable the device to monitor the existence of the route to the head office router and initiate USB modem backup connectivity if the route disappears.

To configure dialer watch, you first add a dialer watch interface and then configure the USB modem interface to participate as a dialer watch interface.

To configure a dialer watch:

  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 76.
  3. Go on to Table 77.
  4. When you are finished configuring the device, commit the configuration.

Table 76: Adding a Dialer Watch Interface

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Edit.

From the [edit] hierarchy level, enter

edit interfaces

Select a dialer interface—for example, dl0.

Adding a description, such as dialer-watch, can help you identify one dialer interface from another.
  1. Under Interface name, select dl0.
  2. In the Description box, type dialer-watch.
  1. Enter

    edit dl0

  2. Enter

    set description dialer-watch

On a logical interface—for example, 0—configure the route to the head office router for dialer watch—for example, 200.200.201.1/32.
  1. Under Unit, click the logical unit number 0.
  2. Next to Dialer options, click Edit.
  3. Next to Watch list, click Add new entry.
  4. In the Prefix box, type 200.200.201.1/32.
  5. Click OK.
  1. Enter

    edit unit 0 dialer-options

  2. Enter

    set watch-list 200.200.201.1/32

Configure the name of the dialer pool to use for dialer watch—for example, dw-pool.
  1. In the Pool box, type dw-pool.
  2. Click OK.

Enter

set pool dw-pool

Table 77: Configuring a USB Modem Interface for Dialer Watch

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy, and select the USB modem physical interface umd0.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Edit.
  3. Under Interface name, click umd0.

From the [edit] hierarchy level, enter

edit interfaces umd0 dialer-options pool dw-pool

Configure dialer watch options for the USB modem interface participating in the dialer watch.

The USB modem interface must have the same pool identifier to participate in dialer watch. Therefore, the dialer pool name dw-pool, for the dialer watch interface configured in Table 76, is used when configuring the USB modem interface.

  1. Next to Dialer options, click Edit.
  2. Next to Pool, click Add new entry.
  3. In the Pool identifier box, type dw-pool.
  4. Click OK.
 
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