Would like to have some clarification on following scenario:

  1. There is Linux platform with an Ethernet interface which has some constant default IP address (eth0: and some changing IP address (eth0:1 Meaning, both have same MAC address.
  2. There is an IGMP V2 join message sent out from to multicast group
  3. There is an IGMP V3 leave message sent out from to multicast group

What are the possible effects of this?

  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer.
    – Ron Maupin
    Dec 14, 2019 at 20:21

1 Answer 1


It depends.

If your switching infrastructure is IGMP-aware (IGMP snooping), the IGMP leave group is translated to an Ethernet multicast leave group and that causes the switch port to disable forwarding for that group. However, the next query would rejoin the port to the IGMP group.

Without switch IGMP support, multicasts are flooded like broadcasts, making them work continuously.

Note that is reserved by IANA and shouldn't be used (check RFC 5771).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.