Greetings, It is possible that some existing traffic hasn't failed over solely with the configuration changes. Some traffic, especially sensitive traffic like voice/video calls or some streaming services for example, might not failover since that would break the connection completely. I would suggest testing with a new client, or at least a client that has been disconnected for at least five minutes from the network and then testing again. After that, if possible, I would physically disconnect WAN 1 to force the traffic to failover. If some IPv4 traffic still egresses from WAN 1 - I would suggest contacting support and opening a case so that we can investigate further. Immediate failover/failback is also an option but we should troubleshoot prior to enabling that option. https://documentation.meraki.com/General_Administration/Support/Contacting_Support https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/Connection_Monitoring_for_WAN_Failover#.E2.80.9CImmediate.E2.80.9D
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