Chapter 39 Multicast
GS1920v2 Series User’s Guide
219
CHAPTER 39
Multicast
39.1 Multicast Overview
This chapter shows you how to configure various multicast features.
Traditionally, IP packets are transmitted in one of either two ways
– Unicast (one sender to one recipient)
or Broadcast (one sender to everybody on the network). Multicast delivers IP packets to just a group of
hosts on the network.
IGMP (Internet Group Management Protocol) is a network-layer protocol used to establish membership
in a multicast group
– it is not used to carry user data. Refer to RFC 1112, RFC 2236 and RFC 3376 for
information on IGMP versions 1, 2 and 3 respectively.
39.1.1 What You Can Do – IPv4 Multicast
• Use the IPv4 Multicast Status screen (Section 39.2 on page 223) to view IPv4 multicast group
information.
• Use the IGMP Snooping screen (Section 39.3 on page 224) to enable IGMP snooping to forward group
multicast traffic only to ports that are members of that group.
• Use the IGMP Snooping VLAN screen (Section 39.4 on page 227) to perform IGMP snooping on VLANs.
• Use the IGMP Filtering Profile (Section 39.5 on page 228) to specify a range of multicast groups that
clients connected to the Switch are able to join.
39.1.2 What You Can Do – IPv6 Multicast
• Use the IPv6 Multicast Status screen (Section 39.6 on page 231) to view IPv6 multicast group
information.
• Use the MLD Snooping-proxy screen (Section 39.7 on page 231) to enable the upstream port to report
group changes to a connected multicast router and forward MLD messages to other upstream ports.
• Use the MLD Snooping-proxy VLAN screen (Section 39.8 on page 232) to enable and configure MLD
snooping-proxy settings on the VLANs you specified.
• Use the MLD Snooping-proxy Port Role Setting screen (Section 39.9 on page 234) to assign MLD
snooping-proxy port roles and configure Leave settings for each port.
• Use the MLD Snooping-proxy Filtering screen (Section 39.10 on page 236) to enable and configure
MLD snooping-proxy filtering.
• Use the MLD Snooping-proxy Filtering Profile screen (Section 39.11 on page 237) to create/edit MLD
snooping-proxy filtering profiles.
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