Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

Multicast listener query

The Multicast Listener Query message is sent by the multicast router to a local subnet, to determine whether any multicast group members still exist on the subnet. Multicast Listener Query messages are of two types:

  • General: The router periodically sends a general Query to poll all hosts on the subnet for the presence of any multicast address. Link-local addresses, the All-Nodes multicast address (FF02::1), and reserved multicast addresses (addresses with a scope of 0) and interface-local addresses (addresses with a scope of 1) are excluded from the poll.
  • Multicast-address-specific. The router sends a multicast-address-specific query only to members of a specific multicast group on the subnet.

The Multicast Listener Report message is equivalent to an IGMPv2 Host Membership Query message. It is ICMPv6 message type 130.