How can I get alerted if a WAN link goes down in a WAN fail-over scenario?

12/20/2019 162 24010

DESCRIPTION:

WAN Failover enables you to configure one of the user-defined interfaces as a secondary WAN port. The secondary WAN port can be used in a simple active/passive setup to allow traffic to be only routed through the secondary WAN port if the Primary WAN port is unavailable. This allows the SonicWall to maintain a persistent connection for WAN port traffic by “failing over” to the secondary WAN port.

RESOLUTION:

• Configure Probing from the WAN interfaces

1.  Click Manage | Network | Failover & Load-Balancing , click  Configure  the Load Balancing group containing your WAN interfaces.
   
   
   
2. On the new pop-up window, Click Probing  tab and tick the box that says Probe responder.global.sonicwall.com on all interfaces in this group.
   
3. Now that probing is set from your WAN interfaces to a public domain on the Internet at a regular interval, we will want to set-up the logs to get an alert if the probing fails.

• Configure alerts for when a WAN link goes down.

1.  Click Manage | Logs | Base Setup | Network | Failover & Load-Balancing and tick the corresponding Alert box .
   
   
   
2.  Confirm an alert is created once the WAN link goes down by going to Investigate | Event Logs. Sort by Alert priority and the Failover & Load Balancing category, and unplug/replug one of your WAN links .
3. Once it is confirmed an alert gets shown when a WAN link goes down, the configuration is finished and an alert will be displayed in the logs when one of your WAN link goes down.
   

   TIP: If you want to receive an alert by email when this happens, it is also possible by setting up the " Automation" as described in article 170822075447859.

    

Resolution for SonicOS 6.2 and Below

The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.

• Configure Probing from the WAN interfaces
  
  

1. Click on Network | Failover and LB, click Configure the Load Balancing group containing your WAN interfaces.
   
   
   
2.  On the new pop-up window, Click Probing tab and tick the box that says Probe responder.global.sonicwall.com on all interfaces in this group.
   
3. Now that probing is set from your WAN interfaces to a public domain on the Internet at a regular interval, we will want to set-up the logs to get an alert if the probing fails.

• Configure alerts for when a WAN link goes down.

1.  Click Log | Settings | Network | Failover and Load Balancing, Check on the appropriate Alert type that you need alerts.
   
   
   
   
2.  Confirm an alert is created once the WAN link goes down by going to Log | Log Monitor, Click on Filter View, sort by Alert priority and the Network category, and unplug/replug one of your WAN links. An alert will be displayed in the logs when one of your WAN link goes down.
   
   

   TIP: If you want to receive an alert by email when this happens, it is also possible by setting up the "Log Automation" as described in article 170822075447859.