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Check these Knowledge Base articles for solutions to common issues.
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Troubleshoot issues in an Airwall secure network.
Cellular failover or intermittent connectivity on a 100g Airwall Gateway (before v1.12.5)
If you have configured your Airwall Gateway with DHCP, failover between cellular or Wi-Fi to a wired connection in versions previous to v1.12.5 may not work correctly.

Cellular failover or intermittent connectivity on a 100g Airwall Gateway (before v1.12.5)

If you have configured your Airwall Gateway with DHCP, failover between cellular or Wi-Fi to a wired connection in versions previous to v1.12.5 may not work correctly.

If you experience any of the following issues, you need to update your Airwall Gateway:

Long latency when failing over between cellular or Wi-Fi to a wired connection.
An incorrect IP address is displayed for the Airwall Gateway after failing over.
Intermittent packet loss between trusted endpoints after a successful failover.

Solution

Update the Airwall Gateway firmware to v1.12.5 or v2.0.1, available from the Firmware section of this site. If you want to update to a much later version, see How to Update from Older Versions or contact Customer Success.