I don't have a lot of experience with multicast, but my understanding is that you only need multicast routing if you are routing multicast traffic between two or more networks.  If everything is on a single LAN you just need IGMP Snooping and and IGMP Querier.   I do have an application on one of our networks that relies on multicast, all I did for that network was to create an interface on the switch closest to the multicast source and under Multicast Routing I selected "Enable IGMP Snooping Querier", then under Switch Settings I have "IGMP Snooping" Enabled and "Flood unknown multicast traffic" disabled.   Here is some information from the Meraki documentation about multicast support:  Multicast support - Cisco Meraki   And this community post was very helpful:  https://community.meraki.com/t5/Switching/Multicast-Basic-s/m-p/25867#M2125   Russ   ... View more

I guess what you are saying is create a mirror subnet in site B (DR) and just don't let it participate in the VPN until you want to fail over? ... View more

I have this exact issue and it's driving me mad as we're trying to push software remotely and updates etc and most fail due to incorrect hostname or network error etc presumably because it cannnot decipher which IP is correct...   Did you ever get to the bottom of it?  ... View more

@Mahi_Meraki_guy solution is the easy one. ... View more

I'm having the same issue with Windows 10 machines.  I opened my case with support back on February 12 and have been told the same thing - that it's been sent to the development team.  February 12 was 10 WEEKS AGO...and I haven't heard a word!  The frustrating part is they're adding new features instead of fixing what they have!! ... View more