Ipv6 Multicast Routing And Forwarding Overview; Introduction To Ipv6 Multicast Routing And Forwarding; Rpf Mechanism - 3Com MSR 50 Series Configuration Manual

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IPv6 Multicast Routing
and Forwarding
Overview
Introduction to IPv6
Multicast Routing and
Forwarding

RPF Mechanism

IP 6 M
V ULTICAST
F
ORWARDING
When configuring IPv6 multicast routing and forwarding, go to the following
sections for information you are interested in:
"IPv6 Multicast Routing and Forwarding Configuration" on page 1209
■
"Configuring IPv6 Multicast Routing and Forwarding" on page 1212
■
"Displaying and Maintaining IPv6 Multicast Routing and Forwarding" on page
■
1214
"Troubleshooting IPv6 Multicast Routing and Forwarding" on page 1215
■
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.
When creating IPv6 multicast routing table entries, an IPv6 multicast routing
protocol uses the reverse path forwarding (RPF) to ensure IPv6 multicast data
delivery along the correct path.
The RPF mechanism enables routers to correctly forward IPv6 multicast packets
based on the multicast route configuration. In addition, the RPF mechanism also
helps avoid data loops caused by various reasons.
R
OUTING AND
C
ONFIGURATION