Well, I went ahead and disabled Load Balancing to see if there will be any other issues. I have the guest ssid using the backup connection. Default traffic shaping rules applied. the voice vlan has a rule of ef46 and high priority. I got this interesting response from Net2phone support. The phones don't require any special protocols for them to work with our platform, so I don't think IGMP can cause an issue. As for the Meraki firewall, there is no need to make any changes. Please keep in mind that our firewall guide serves to ensure the best possible experience where the phones are receiving/sending sip signaling (registration) and rtp signaling (audio). In this case, the phones are operating just fine and is receiving RTP. The main issue here is that when you have DUAL WAN scenario and your primary IP is back online while your network is utilizing the failover IP, the phones would continue to register on the failover IP while RTP traffic is signaling on the primary IP. I would recommend contacting Cisco to see if there's a way to set up the Meraki so that it can auto reboot the moment your primary IP is back online so that all the devices can reboot as well. In other words, if failover IP is in use and primary IP is offline - devices should connect using failover IP. Otherwise, if primary IP comes up online and the phones connected to the Meraki are using failover IP auto reboot firewall so that all phones can receive this change.
... View more