We are adding an IP based PA system to our high school. The high school is made up of three buildings (separate vlans) that all connect back to a core router. The push-to-talk microphones (also IP) are in various offices at each HS building connecting to endpoint switches.
The problem is that the multicast is only traveling downstream. It never gets back up to the core so it can come back down to the other buildings.
If we plug the PTT mic into the last switch, only the PA speakers on that switch get the stream.
If we plug the PTT mic into the first switch in the series then all of the downstream switches get the stream. The stream never leaves the network closet to go to the other closets in the building or up to the core.
What commands do I use on these 7150's to tell it to pass the streams up to the previous switch all the way to the core?
All of the PA devices are on the building default DHCP vlan.
We have set the following at the global level.
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ip multicast passive
ip multicast version 3
ip pimsm-snooping
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What am I missing?
Thank you for any guidance.
