# Is Multicast / IGMP needed?

**URL:** <https://community.roonlabs.com/t/is-multicast-igmp-needed/71892>\
**Category:** Roon Software Discussion\
**Created:** [June 11, 2019, 10:37pm UTC](https://community.roonlabs.com/t/is-multicast-igmp-needed/71892 "2019-06-11T22:37:34Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Steve\_Mato](https://community.roonlabs.com/letter_avatar/steve_mato/32/5_5575768a8748004e209b776fc1b2916d.png) [@Steve\_Mato](https://community.roonlabs.com/u/Steve_Mato)\
**Post date:** [June 13, 2019, 4:04pm UTC](https://community.roonlabs.com/t/is-multicast-igmp-needed/71892/9 "2019-06-13T16:04:11Z")

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Wouldn’t multicast only be utilized if one had multiple linked zones? Where you want all endpoints to be fed one identical stream from the Roon source in perfect sync? I link 3 to 4 zones myself.

I’m asking, not saying this is the case. Just surmising so. I can’t see a reason for multicast of one doesn’t link zones but every reason for it if one does. But I’m no authority on either the network protocol or relation to roon.

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