Configuring Ipv6 Multicast Vlans; Overview - HP 6125XLG Ip Multicast Configuration Manual

Configuring IPv6 multicast VLANs

Overview

As show in
multicast group. When Switch A (Layer 3 device) receives IPv6 multicast data for that group, it sends
three copies of the data to Switch B (Layer 2 device). This occupies large bandwidth and increases the
burden on the Layer 3 device.
Figure 74 Multicast transmission without the IPv6 multicast VLAN feature
Source
After an IPv6 multicast VLAN is configured on Switch B, Switch A only sends one copy of the IPv6
multicast data for the IPv6 multicast VLAN on Switch B. This saves network bandwidth and lessens the
burden on the Layer 3 device.
IPv6 multicast VLANs include sub-VLAN-based IPv6 multicast VLANs and port-based IPv6 multicast
VLANs.
Sub-VLAN-based IPv6 multicast VLAN
As shown in
Host A, Host B, and Host C are in VLAN 2 through VLAN 4, respectively.
•
On Switch B, VLAN 10 is an IPv6 multicast VLAN. VLAN 2 through VLAN 4 are sub-VLANs of
•
VLAN 10.
MLD snooping is enabled for the multicast VLAN and its sub-VLANs.
•
Figure 74, Host A, Host B, and Host C reside in different VLANs and join the same IPv6
IPv6 Multicast packets
VLAN 2
VLAN 3
VLAN 4
Switch A
MLD querier
Figure 75:
Switch B
241
VLAN 2
Receiver
Host A
VLAN 3
Receiver
Host B
VLAN 4
Receiver
Host C