Configuring IP Multicast Switching IPMSv6 Overview
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 25-25
IPMSv6 Overview
An IPv6 multicast address identifies a group of nodes. A node can belong to any number of multicast
groups. IPv6 multicast addresses are classified as fixed scope multicast addresses and variable scope
multicast addresses.(See the “Reserved IPv6 Multicast Addresses” on page 25-26.)
IPMSv6 tracks the source VLAN or the source Shortest Path Bridging (SPB) service on which the
Multicast Listener Discovery Protocol (MLD) requests are received. The network interfaces verify that a
multicast packet is received by the switch on the source (or expected) port.
IPMSv6 Example
The figure on the following page shows an IPMSv6 network where video content can be provided to
clients that request it. A server is attached to the switch that provides the source (i.e, multicast) IPv6
addresses. Clients from two different attached networks send MLD reports to the switch to receive the
video content.
Video
OmniSwitch
Network A
Network B
Multicast Server
(source IPv6 address)
Multicast Stream
(destination IPv6 address)
Ports on end stations send
MLD requests to receive
multicast traffic.
Source Port
Multicast Group
(dynamically built)
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