Troubleshooting Tip: Default route lost after the upgrade FortiAuthenticator from v6.3.3 to v6.6.2

[jcastellanos]

Description	This article describes how to diagnose the default route removed from the route table after an upgrade in an HA A-P Topology.
Scope	FortiAuthenticator HA A-P v6.6.2.
Solution	Admin will notice the default route that appears in the config, it is not installed in the route table: After reviewing the section config system ha, it is possible to see the same gateway configured as the default route. To fix the issue, remove the ns-gw in the 'config system ha' section: The Default Gateway(ns-gw) setting is required if the HA management port has a different default gateway than the one specified in the static routes. After removing the ns-gw the default route is installed in the route table: