Hi,
I got a scenario where my L2 MS is connected to mesh solution called APT.
APT nodes find each other using Discovery packets. The APT nodes use the contents of the discovery requests to decide which node will be the master and which will be the client (slave). The client node then attempts to connect to the master using a UDP/IPv6 socket and the link local addresses of the Ethernet ports. The IPv6 address is resolved to an Ethernet MAC address by the Neighbor Discovery protocol. An ICMPv6 Neighbor Solicitation sent from the client to the Neighbor Discovery multicast address of the master.
APT Discovery packets use an IPv6 packet sent to the Multicast address of FF02::1, with UDP payload data with the SRC and DST is set to port 2210.....etc
now as i was reading, i wasn't sure if i should create a multicast address on the MS switches by creating PIM-SM (L3 Settings) following this link
https://documentation.meraki.com/MS/Layer_3_Switching/MS_Multicast_Routing_Overview
or by simply configuring multicast listener discover (MLD) Snooping for IPv6 Multicast , also mentioned in the same link i just posted.
I have never done such settings, appreciate if someone out there had done a semilar solution