There are several instences where devices need to find each other across subnets. Cisco IOS has a feature called helper IP that can facilitate this. Does meraki have anything simila
Basically I have a Sonos system on one subnet and I would like to give people on the guest network access to the sonos system. Sonos can't comunicate with anything outside it's broadcast domain.
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I always thought IP helper was a general broadast forwarding protocol but its strickly for DHCP. Sonos just doesn't support control outside of its broadcast Domain. I was on the phone with a really awsome support guy who looked at the packet captures from my phone trying to connect to sonos. They are using a proprietary protocol that resembles UPnP and a combination of broadcast and multicast traffic.
Sonos is just the worng product for what this client wants to do.