Ipv6 Multicast Forwarding Across Ipv6 Unicast Subnets; Configuration Task List; Enabling Ipv6 Multicast Routing - HP VSR1000 Configuration Manual

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If an IPv6 multicast packet arrives at Router C on GigabitEthernet 1/0/1, the receiving interface
is not the incoming interface of the (S, G) entry. Router C searches its IPv6 unicast routing table
and finds that the outgoing interface to the source (the RPF interface) is GigabitEthernet 1/0/2.
This means that the (S, G) entry is correct but the packet traveled along a wrong path. The
packet fails the RPF check, and Router C discards the packet.

IPv6 multicast forwarding across IPv6 unicast subnets

Routers forward the IPv6 multicast data from an IPv6 multicast source hop by hop along the
forwarding tree, but some routers might not support IPv6 multicast protocols in a network. When the
IPv6 multicast data is forwarded to a router that does not support IPv6 multicast, the forwarding path
is blocked. In this case, you can enable IPv6 multicast data forwarding across the IPv6 unicast
subnets by establishing a tunnel between the routers at both ends of the IPv6 unicast subnets.
Figure 67 IPv6 multicast data transmission through a tunnel
As shown in
Router A encapsulates the IPv6 multicast data in unicast IPv6 packets, and forwards them to Router
B across the tunnel through unicast routers. Then, Router B strips off the unicast IPv6 header and
continues to forward the IPv6 multicast data down toward the receivers.

Configuration task list

Tasks at a glance
(Required.)
(Optional.)
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(Optional.)
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(Optional.)
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(Optional.)
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(Optional.)

Enabling IPv6 multicast routing

Enable IPv6 multicast routing before you configure any Layer 3 IPv6 multicast functionality in the
public network or VPN instance.
To enable IPv6 multicast routing:
Figure 67, a tunnel is established between the multicast routers Router A and Router B.
Enabling IPv6 multicast routing
Configuring IPv6 multicast routing and
Specifying the longest prefix match principle
Configuring IPv6 multicast load splitting
Configuring an IPv6 multicast forwarding boundary
Delivering packets that fail the RPF check to the CPU
forwarding:
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