Ipv6 Multicast Routing And Forwarding Overview; Introduction To Ipv6 Multicast Routing And Forwarding; Rpf Check Mechanism - HP 4800G Series Configuration Manual

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IPv6 Multicast Routing and Forwarding
Configuration
When configuring IPv6 multicast routing and forwarding, go to the following sections for information you
are interested in:

IPv6 Multicast Routing and Forwarding Overview

Configuration Task List
Displaying and Maintaining IPv6 Multicast Routing and Forwarding
Troubleshooting IPv6 Multicast Policy Configuration
The term "router" in this document refers to a router in a generic sense or a Layer 3 switch running an
IPv6 multicast routing protocol.
IPv6 Multicast Routing and Forwarding Overview

Introduction to IPv6 Multicast Routing and Forwarding

In IPv6 multicast implementations, multicast routing and forwarding are implemented by three types of
tables:
Each IPv6 multicast routing protocol has its own multicast routing table, such as IPv6 PIM routing
table.
The multicast routing information of different IPv6 multicast routing protocols forms a general IPv6
multicast routing table.
The IPv6 multicast forwarding table is directly used to control the forwarding of IPv6 multicast
packets. This is the table that guides IPv6 multicast forwarding.
An IPv6 multicast forwarding table consists of a set of (S, G) entries, each indicating the routing
information for delivering multicast data from a multicast source to a multicast group. If a router supports
multiple IPv6 multicast protocols, its IPv6 multicast routing table will include routes generated by these
protocols. The router chooses the optimal route from the IPv6 multicast routing table based on the
configured multicast routing and forwarding policy and installs the route entry into its IPv6 multicast
forwarding table.

RPF Check Mechanism

An IPv6 multicast routing protocol relies on the existing IPv6 unicast routing information or IPv6 MBGP
routes in creating IPv6 multicast routing entries. When creating IPv6 multicast routing table entries, an
IPv6 multicast routing protocol uses the reverse path forwarding (RPF) check mechanism to ensure
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