Having multicast dropping issues on Cisco router. Wireshark shows a device which egress different multicast groups. But also sending out null packets with Destination 0.0.0.0 (0.0.0.0) instead of a multicast address , Source is legit 192.x.x.x, nothing shown under port column.
What issue this can cause on Cisco routers , , and severity. Its not a broadcast or DHCP query, since the destination is 0.0.0.0 not the source. I know its martian address and know the device, brought it offline. But what measure or commands we can apply on cisco router to make sure if a device goes into that state in future, it can not disrupt the whole network or multicast traffic. Some kind of port protection mechanism. To tackle and reduce the impact of 0.0.0.0 destination packets.