Huawei Quidway S9300 Configuration Manual - Multicast page 175

Quidway S9300 Terabit Routing Switch
Configuration Guide - Multicast
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Data Preparation
To complete the configuration, you need the following data:
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Issue 01 (2009-07-28)
Configure the IP addresses of interfaces and the unicast routing protocol. PIM is an intra-
domain multicast routing protocol that depends on a unicast routing protocol. The multicast
routing protocol can work normally after the unicast routing protocol works normally.
Enable multicast on all S9300s providing multicast services. Before configuring other PIM-
SM functions, you must enable the multicast function.
Enable PIM-SM on all the interfaces of S9300s. After PIM-SM is enabled, you can
configure other PIM-SM functions.
NOTE
If IGMP is also required on this interface, PIM-SM must be enabled before IGMP is enabled. The
configuration order cannot be reversed; otherwise, the configuration of PIM fails.
Enable IGMP on the interfaces of S9300s connected to hosts. A receiver can join and leave
a multicast group freely by sending an IGMP message. The leaf S9300s maintain the
multicast membership through IGMP.
Enable the PIM silent function on interface that is directly connected to hosts. In this
manner, malicious hosts are prevented from simulating PIM Hello messages and security
of multicast routers is ensured.
NOTE
PIM silent is applicable only to the interfaces of an S9300 directly connected to the host network
segment that is connected only to this S9300.
Configure the RP. The RP is a root node of an RPT on the PIM-SM network. It is
recommended that you configure the RP on a device that has more multicast flows, for
example, S9300-E in
NOTE
After creating an (*, G) entry according to the new multicast membership, the DR on the user
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side sends Join/Prune messages towards the RP and updates the shared tree on the path.
When a multicast data source starts to send data to groups, the DR unicasts the Register message
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to the RP. After receiving the Register message, the RP decapsulates it and then forwards it to
other multicast members along the shared tree. At the same time, the RP sends a Register-Stop
message to the DR on the multicast source side. After the Register-Stop is performed, the RPT
can be switched to the SPT.
(Optional) Set the BSR boundary on the interfaces connected to the Internet. The Bootstrap
message cannot pass through the BSR boundary; therefore, the BSR serves only this PIM-
SM domain. In this manner, multicast services can be controlled effectively.
(Optional) Configure range of SSM group addresses on each S9300. Ensure that S9300s
in the PIM-SM domain provide services only for multicast groups in the range of SSM
group addresses. In this manner, multicast can be controlled effectively.
NOTE
This configuration example describes only the commands used to configure PIM-SM.
Address of multicast group G: 225.1.1.1/24
Address of multicast group S: 10.110.5.100/24
Version of the IGMP protocol running between routers and hosts: IGMPv3
Range of SSM group addresses: 232.1.1.0/24
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Figure 4-2.
4 PIM-SM Configuration
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