Question / Help OBS Recording via UDP help

[BitterOldMan]

I am using OBS and it is setup to record to UDP so I can stream the computer desktop to my BrightSign units. Everything works well but ran into an issue. Seems when OBS is running and recording, it is impacting other network devices on the network. My network team says the issue is: Basically the multicast created a denial of service (DoS) situation on the Flex 310 DMI series. Multicast means that all packets are sent to the broadcast address on the network which means all switch ports and all devices will receive the traffic and have to process these packets. You are basically turning a switched network into a hub as all ports get flooded with the multicast traffic which causes additional strain on all devices (including switches). The DMIs by nature are not very powerful devices (I would consider them IoT, purpose build) that basically got overwhelmed by the processing of the traffic which is not intended for them, which in turn caused them to drop off periodically from the network and then start responding again. More powerful devices do not show an impact but still have to process the packets to determine that they are not needed before they have to discard them.

My question is there a way within OBS to direct what devices receive the UDP broadcast?

 

[R1CH]

Multicast should only go to ports that have subscribed to it. If it's going to all ports then your switch config needs to be checked, you may need to enable "IGMP Snooping" or a similar option (assuming you have an IGMP aware switch).