2 Replies Latest reply on Jan 19, 2015 2:40 PM by yage

    Chromecast / Multicast Setup

    yage New Member

      Hi all !

       

      I had a question in regards to multicast, and VLAN segments. We frequently use Chromecasts within our networks so users can stream video/presentations/chrome content to various conference rooms. The Chromecast devices operate on the DIAL protocol. The DIAL Service Discovery enables a client to discover DIAL Server (Chromecast) on its local network, and obtain access to those services. This is achieved using a new search target within the SSDP defined by uPNP. In short if your not on the same segment as the chromecast device you will be unable to see it.

       

      I was wondering if it would be possible to forward that traffic to a particular network. In this scenario users on the wireless network (VLAN 300) can see the Chromecast. Users on the wired network (VLAN 100) cannot. I have tired playing with the UDP relay, and various ACLs without success.

      When clients connect to the Chromecast they send a request over UDP to IP address 239.255.255.250 and UDP port number 1900.

       

      Any suggestions would be great.

       

      Thanks

       

      -Eric

        • Re: Chromecast / Multicast Setup
          Employee

          Eric,

          Thanks for asking your question on the forum!

           

          After doing some research, it looks like Chromecast uses a multicast discovery packet which discovers clients who want to cast. This multicast packet has a TTL of 1 so it cannot be routed across subnets.

           

          However, I believe Google is looking to add a feature soon that will take away the requirement of being on the same wireless network/subnet.

           

          Please do not hesitate to let us know if you have any questions.

           

          Thanks,

          Noor