We have recently updated our switching product to kernel version 4.19.112 from version 4.1.49. When multiple devices are connected to each other in a stack they send Router Advertisements periodically. After updating to 4.19.112 we are observing that whenever a device sends Router Advertisement all the connected devices start to respond with Multicast Listener Report Message v2. Is there a way I can stop these packets from being sent out? We do not use IGMP in our product.

I tried to play around with parameters like net.ipv6.conf.all.mldv2_unsolicited_report_interval but that did not help. At best I was able to switch between v1 and v2 by setting this:
net.ipv6.conf.all.force_mld_version


Thanks
Dipinder