Binary package “smcroute” in ubuntu focal

static multicast router daemon

 SMCRoute is a daemon and command line tool to manipulate the multicast
 routing table of a UNIX kernel. It can be used as an alternative to
 dynamic multicast routers like pimd, mrouted, quagga-pimd, or xorp in
 situations where static multicast routes should be maintained and/or no
 proper IGMP signaling exists.