Hi dears,

I have a switch CRS317 (version OS 7.15.2) working with IGMP snooping, with only Vlan1 on its ports. Usually, we have several multicasts running on 2 or 3 devices streaming video at the same time, connected CRS ports.

All the streams were working correctly, suddenly we started to lose intermittent video on some devices connected to the CRS, the reason the dynamic multicast entries on the MDB table are unstable, each entry only holds the multicast address in one port, if there are more than one, the rest will flap and its behavior is intermittence.

The temporal solution was to set the multicast entries manually on ports, but it needs to be dynamic for the daily operation.

Please let me know if you have an issue like this, I attached the txt config and some images.


Thank you so much!.