3Com Switch 4800G 24-Port - Configuring Ipv6 Multicast VLAN; Introduction to Ipv6 Multicast VLAN

45
IPV6 MULTICAST VLAN
CONFIGURATION
Introduction to IPv6
Multicast VLAN
As shown in Figure 182, in the traditional IPv6 multicast programs-on-demand
mode, when hosts that belong to different VLANs, Host A, Host B and Host C
require IPv6 multicast programs on demand service, Router A needs to forward a
separate copy of the IPv6 multicast data in each VLAN. This results in not only
waste of network bandwidth but also extra burden on the Layer 3 device.
Figure 182 Before and after IPv6 multicast VLAN is enabled on the Layer 2 device
To solve this problem, you can enable the IPv6 multicast VLAN feature on Switch
A, namely configure the VLANs to which these hosts belong as sub-VLANs of an
IPv6 multicast VLAN on the Layer 2 device and enable IPv6 Layer 2 multicast in the
IPv6 multicast VLAN. After this configuration, Router A replicates the IPv6
multicast data only within the IPv6 multicast VLAN instead of forwarding a
separate copy of the IPv6 multicast data to each VLAN. This saves the network
bandwidth and lessens the burden of the Layer 3 device.
Configuring IPv6
Multicast VLAN
Follow these steps to configure IPv6 VLAN
IPv6 multicast packet transmission
without IPv6 multicast VLAN
Source
Router A
IPv6 multicast packets
IPv6 multicast packet transmission
when IPv6 multicast VLAN runs
Source
Router A
Switch A
Host A
Receiver
Host B
Receiver
Host C
Receiver
VLAN 30
VLAN 20
VLAN 10
Switch A
Host A
Receiver
Host B
Receiver
Host C
Receiver
VLAN 30
VLAN 20
VLAN 10
To do… Use the command… Remarks
Enter system view system-view -