bridge: per-VLAN default multicast settings are off

[troglobit]

The global bridge setting mcast_vlan_snooping VAL must be set to 1 on VLAN filtering bridges when a given VLAN has multicast filtering enabled.

Also, the default IGMP and MLD versions on a new VLAN filtering bridge are off:

admin@example:~$ bridge vlan global show dev br1
port              vlan-id  
br1               1-2
                    mcast_snooping 1 mcast_querier 0 mcast_igmp_version 2 mcast_mld_version 1 mcast_last_member_count 2 mcast_last_member_interval 100 mcast_startup_query_count 2 mcast_startup_query_interval 3124 mcast_membership_interval 26000 mcast_querier_interval 25500 mcast_query_interval 12500 mcast_query_response_interval 1000 
admin@example:~$ bridge -j vlan global show dev br1
[{"ifname":"br1","vlans":[{"vlan":1,"vlanEnd":2,"mcast_snooping":1,"mcast_querier":0,"mcast_igmp_version":2,"mcast_mld_version":1,"mcast_last_member_count":2,"mcast_last_member_interval":100,"mcast_startup_query_count":2,"mcast_startup_query_interval":3124,"mcast_membership_interval":26000,"mcast_querier_interval":25500,"mcast_query_interval":12500,"mcast_query_response_interval":1000}]}]
admin@example:~$ bridge -j vlan global show dev br1 |jq
[
  {
    "ifname": "br1",
    "vlans": [
      {
        "vlan": 1,
        "vlanEnd": 2,
        "mcast_snooping": 1,
        "mcast_querier": 0,
        "mcast_igmp_version": 2,
        "mcast_mld_version": 1,
        "mcast_last_member_count": 2,
        "mcast_last_member_interval": 100,
        "mcast_startup_query_count": 2,
        "mcast_startup_query_interval": 3124,
        "mcast_membership_interval": 26000,
        "mcast_querier_interval": 25500,
        "mcast_query_interval": 12500,
        "mcast_query_response_interval": 1000
      }
    ]
  }
]

• IGMP version should be 3
• MLD version should be 2