The controller is essentially shouting into an Players no longer see the SSDP discovery messages from the controller and When you move the Sonos players into a different VLAN from the controllers, the And even if they were, the TTL of 1 would prevent the router/firewall fromįorwarding the packet because the TTL would hit zero as it did so.Home routers and firewalls aren't configured to route multicast by default.Multicast and those packets are sent with a Time To Live This works great when everything is on the same VLAN or broadcast domain butīreaks across VLANs because SSDP messages are sent via The players respond with, 'Hi, please don't yell.' The controller sends out messages asking, 'HEY! Ya'll out there?' And That's all happening because of a protocol that the app (also known as the

Notice how no matter which device you open the Sonos app on, they all see the Though you didn't have to enter their IP addresses or names into the app? Ever Moving on.ĭid it ever occur to you how the Sonos app knows which players you have even Oh, well, yes, I too have multiple VLANs in my home network. Well, why do you have multiple VLANs in your home network?! Thanks to Daniel Durrans for pointing this out. Update Jan 9, 2023: There was a typo in the original version of the drawing aboveĪnd in the instructions below: I incorrectly wrote port 1433 instead of 1443. If the diagramĪlone isn't enough to help you, then keep reading. In a hurry? Don't want to take the time to learn what's really going on? If youĬan grok this diagram, then you don't need to read any further. What you read below works successfully with Sonos Beam, Sonos Sub, and Sonos Process work when those two devices are in different VLANs. This post will dive deep on what's happening on the wire when a SonosĬontroller (eg, your mobile phone running the Sonos app) tries to talk with the

They don't have a diagram of traffic flow! Every network engineer knows thatĪ diagram is a must when trying to understand how two systems are talking to.

Interfaces when talking about multicast).

Their instructions had errors (eg, reversing the upstream and downstream.

Suffered from one or both of these problems: There are many forum and blog posts out there that describe (orĪttempt to describe) how to make this work, however all of the ones I read I recently jumped through similar hoops for Sonos

In a throwback to the problems I dealt with using

Sonos for windows phone