Shoretel IP Phone Issue over BGP with ADVPN

[ScotDiGe]

I have about 12 remote sites connected via BGP with ADVPN. At each site, I have Shoretel VoIP phones. They connect and register just fine. The issue I run into is that if a phone gets disconnected, it does not seem to want to connect again. I do have the VLAN going to a black hole if the site-to-site goes down, but the issue comes if it is just one or two phones that disconnect. Not sure how to reset the phone connection over the VPN. If I go to the Shoretel phone system and move the phone from one server to another, then back to the original server, the phone reconnects. Not sure if anyone else has seen this issue and can give some feedback.

[aionescu]

Hi @ScotDiGe , welcome to the Fortinet Community! Your issue is not very clear but, but a good troubleshooting starting point, is to understand how the FortiGate handles the traffic. To do this you could run a debug of the traffic flow, as described at: https://docs.fortinet.com/document/fortigate/6.2.16/cookbook/54688/debugging-the-packet-flow

Ideally you would run this when the issue is ongoing as this will show us what kind of traffic the phone generates and how it is handled by the FortiGate.

Additional information is provided by the session created when the traffic reaches the firewall. More info on how you can filter/view the session at: https://docs.fortinet.com/document/fortigate/6.2.8/cookbook/562859/using-a-session-table

[ScotDiGe]

Thank you. I will look into this when the Client has another issue. Seems like the issues have not raised up again so this may have been another issue