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Configuration examples
IPv6 multicast forwarding over a GRE tunnel
Network requirements
As shown in Figure 81, IPv6 multicast routing and IPv6 PIM-DM are enabled on Switch A and Switch C.
Switch B does not support IPv6 multicast. OSPFv3 is running on Switch A, Switch B, and Switch C.
Configure the switches so that the receiver host can receive the IPv6 multicast data from the source.
Figure 81 Network diagram
Configuration procedure
1. Configure the IPv6 address and prefix length for each interface as shown in Figure 81. (Details not
shown.)
2. Enable OSPFv3 on the switches to meet the following requirements: (Details not shown.)
{ The switches are interoperable at the network layer.
{ The switches can dynamically update their routing information.
3. Configure a GRE tunnel:
# On Switch A, create service loopback group 1, and specify its service type as Tunnel.
<SwitchA> system-view
[SwitchA] service-loopback group 1 type tunnel
# Add Ten-GigabitEthernet 1/1/7 to service loopback group 1. Ten-GigabitEthernet 1/1/7 does
not belong to VLAN 100 or VLAN 101.
[SwitchA] interface ten-gigabitethernet 1/1/7
[SwitchA-Ten-GigabitEthernet1/1/7] port service-loopback group 1
[SwitchA-Ten-GigabitEthernet1/1/7] quit
# Create interface Tunnel 0, and specify the tunnel encapsulation mode as GRE over IPv6.
[SwitchA] interface tunnel 0 mode gre ipv6
# Assign an IPv6 address to interface Tunnel 0, and specify its source and destination addresses.
[SwitchA-Tunnel0] ipv6 address 5001::1 64
[SwitchA-Tunnel0] source 2001::1
[SwitchA-Tunnel0] destination 3001::2
[SwitchA-Tunnel0] quit
IPv6 multicast router
Switch A
Vlan-int101
2001::1/64
Vlan-int102
3001::1/64
Vlan-int102
3001::2/64
Vlan-int101
2001::2/64
Source Receiver
4001::100/64
Vlan-int200
4001::1/64
1001::100/64
Vlan-int100
1001::1/64
GRE tunnel
Tunnel0
5001::1/64
Tunnel0
5001::2/64
IPv6 unicast router
Switch B
IPv6 multicast router
Switch C
Member port of the
service loopback group
XGE1/1/7 XGE1/1/7
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