MX Uplink DNS Behaviour

[AY2022]

Greetings All. 

Came online and noticed one of the remote network's WAN 1 was showing 'failed' status. 

Checked and discovered it was caused by a 'disruption' in the existing DNS (provided by ISP). 

Changed to Google DNS and line came back up. 

At the same time WAN 2 remained 'Active'. 

Would like to know whether there's a documented KBA on such finding. 

Will a failed DNS configured lead to a 'failed' status of the WAN? 

[alemabrahao]

There will certainly be a failure, devices communicate with the Meraki Cloud via Meraki addresses.

Just read the Meraki architecture documentation.

https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/....

[KarstenI]

This is documented under Connection Monitoring for WAN Failover.