Reproduction steps:
set protocols igmp-proxy interface eth1 alt-subnet '224.0.0.0/8' set protocols igmp-proxy interface eth1 role 'upstream' set protocols igmp-proxy interface eth1 threshold '1' set protocols igmp-proxy interface eth3 alt-subnet '192.168.0.0/24' set protocols igmp-proxy interface eth3 role 'downstream' set protocols igmp-proxy interface eth3 threshold '1'
After commit command, we receive the message in logs
Jul 30 13:26:10 vyos igmpproxy[2464]: MC-Router API already in use; Errno(98): Address already in use
It seems FRR/PIMD always listening and used