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000013185
 Configure Modem Failover and Link Monitor in Fireware v12.0.2 and lower

Information

How do I configure modem failover and link monitor in Fireware v12.0.2 and lower?

In Fireware 12.0.2 and lower, you can configure your Firebox or XTM device to send traffic through a modem when your device cannot send traffic with any external interface. Link monitor settings appear in the modem settings.

For a list of supported modems, Fireboxes, and XTM devices see Supported 3G/4G USB cellular modems for modem failover.

NOTE: In Fireware v12.1 and higher, modems are dedicated external interfaces with modem failover enabled. Link monitor settings appear in the multi-WAN settings. For more information about modem interfaces in Fireware v12.1 and higher, see About Modem Interfaces in Fireware Help.

Connect the Modem

To use a modem with your Firebox:

  1. Connect the modem to your Firebox and power the modem on.
  2. If the Firebox is powered on, reboot the Firebox:
    • From Fireware Web UI, on the Front Panel page, click Reboot.
    • From Firebox System Manager, select File > Reboot
The Firebox recognizes a modem only if the modem is connected and powered on when the Firebox reboots.

Enable Modem Failover

To enable modem failover in Fireware v12.0.2 or lower, from the Web UI:
  1. Select Network > Modem. The Modem page appears.
  2. Select the Enable Modem for Failover when all External interfaces are down check box.
    User-added image
  3. Complete the settings on the Account, DNS, Dial-Up, and Link Monitor tabs, as described in the next sections.
  4. Click Save.
To enable modem failover in Fireware v12.0.2 or lower, from Policy Manager:
  1. Select Network > Modem.The Modem Configuration dialog box appears.
  2. Select the Enable Modem for Failover when all External interfaces are down check box.
    User-added image
  3. Complete the settings on the Account, DNS, Dial-Up, and Link Monitor tabs, as described in the next sections.
  4. Click OK.
  5. Save your configuration.

Link Monitor Settings

The Link Monitor is a tool you can use to verify the status of each external interface on your Firebox. In Fireware v12.0.2 and earlier, when you configure the modem settings on your Firebox, you can set options to test one or more external interfaces for an active connection. When an external interface is active again, the device no longer sends traffic over the modem. Instead, it uses the available external interface or interfaces.

You can configure the Link Monitor to ping a site or device on the external interface, create a TCP connection with a site and port number you specify, or both. You can also set the time interval between each connection test, and configure the number of times a test must fail or succeed before an interface is activated or deactivated.

To configure the Link Monitor settings for an interface in Fireware v12.0.2 and lower, from Fireware Web UI:
  1. Select the Link Monitor tab.The ping and TCP connection options you set for each external interface appear.
    User-added image
  2. From the Interface Name list, select an interface and click Configure.The Link Monitor dialog box appears.
    User-added image
  3. To ping a location or device on the external network, select the Ping check box.
  4. In the adjacent text box, type an IP address or host name.
  5. To create a TCP connection to a location or device on the external network, select the TCP check box.
  6. In the adjacent text box, type an IP address or host name.
  7. (Optional) In the Port text box, type or select a port number. The default port number is 80 (HTTP).
  8. To require successful ping and TCP connections before an interface is marked as active, select the Both Ping and TCP must be successful check box.
  9. To change the amount of time between connection attempts, in the Probe interval text box, type or select a different number.The default setting is 15 seconds.
  10. To change the number of failures that mark an interface as inactive, in the Deactivate after text box, type or select a different number. The default value is three (3) connection attempts.
  11. To change the number of successful connections that mark an interface as active, in the Reactivate after text box, type or select a different number.The default value is three (3) connection attempts.
  12. Click OK.
To configure the Link Monitor settings for an interface in Fireware v12.0.2 and lower, from Policy Manager:
  1. In the Modem Configuration dialog box, click Link Monitor.The Link Monitor Configuration dialog box appears.
    User-added image
  2. From the External Interfaces list, select an external interface.
  3. Configure the settings for the selected interface. You must configure each interface separately.
  4. To ping a location or device on the external network, select the Ping check box. In the adjacent text box, type an IP address or host name.
  5. To create a TCP connection to a location or device on the external network, select the TCP check box. In the adjacent text box, type an IP address or host name
  6. (Optional) In the Port text box, type or select a  port number.The default port number is 80 (HTTP).
  7. To require successful ping and TCP connections before an interface is marked as active, select the Both Ping and TCP must be successful check box.
  8. To change the amount of time between connection attempts, in the Probe interval text box, type or select a different number.The default setting is 15 seconds.
  9. To change the number of failures that mark an interface as inactive, in the Deactivate After text box, type or select a different number. The default value is three (3) connection attempts.
  10. To change the number of successful connections that mark an interface as active, in the Reactivate After text box, type or select a different number.The default value is three (3) connection attempts.
  11. Click OK.

See Also

Supported 3G/4G USB cellular modems for modem failover
About Modem Interfaces in Fireware Help​ (Fireware v12.1 and higher)