3com S7906E Installation Instruction
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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:
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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.
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The S7900E Series Ethernet Switches are distributed devices that support Intelligent Resilient
Framework (IRF). Two S7900E series can be connected together to form a distributed IRF device.
If an S7900E series is not in any IRF, it operates as a distributed device; if the S7900E series is in
an IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in
the System Volume.
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EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
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.