R3303-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

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IPv6 multicast forwarding over GRE tunnel
configuration example
The example configures IPv6 multicast forwarding over a GRE tunnel.
Network requirements
IPv6 multicast routing and IPv6 PIM-DM are enabled on Router A and Router C. Router B does not
support IPv6 multicast. OSPFv3 is running on Router A, Router B, and Router C. Configure a GRE tunnel
so that the receiver can receive the IPv6 multicast data from the source.
Figure 78 Network diagram
Configuration procedure
1. Enable IPv6 forwarding and configure the IP address and prefix length for each interface as shown
in Figure 78. (Details not
shown.)
2. Configure a GRE tunnel:
# Create interface Tunnel 0 on Router A and assign the IPv6 address and prefix length to interface
Tunnel 0.
<RouterA> system-view
[RouterA] interface tunnel 0
[RouterA-Tunnel0] ipv6 address 5001::1 64
# On Router A, specify the tunnel encapsulation mode as GRE over IPv6 and assign the source and
destination addresses to interface Tunnel 0.
[RouterA-Tunnel0] tunnel-protocol gre ipv6
[RouterA-Tunnel0] source 2001::1
[RouterA-Tunnel0] destination 3001::2
[RouterA-Tunnel0] quit
# Create interface Tunnel 0 on Router C and assign the IPv6 address and prefix length to interface
Tunnel 0.
<RouterC> system-view
[RouterC] interface tunnel 0
[RouterC-Tunnel0] ipv6 address 5001::2 64
GE2/1/1
1001::1/64
IPv6 multicast router
Router A
GE2/1/2
2001::1/64
GE2/1/2
3001::1/64
GE2/1/2
3001::2/64
GE2/1/1
2001::2/64
Source Receiver
4001::100/64
GE2/1/1
4001::1/64
1001::100/64
GRE tunnel
Tunnel0
5001::1/64
Tunnel0
5001::2/64
IPv6 unicast router
Router B
IPv6 multicast router
Router C