6 PIM-SM (IPv4) Configuration
About This Chapter
The PIM protocol is used to implement multicast routing and data forwarding inside an AS. The
PIM-SM protocol is a multicast routing protocol of sparse node. It is applicable to a large-scale
network with sparsely-distributed members.
6.1 PIM-SM Overview
In a PIM-SM network, group members are sparsely distributed and almost all the network
segments do not have group members resided. Therefore, an RP is a forwarding core of the PIM-
SM network. All PIM devices in the PIM-SM network must know the location of the RP and
the RP collects information about both group members and multicast sources.
6.2 PIM-SM Features Supported by the S7700
The system can work normally with default PIM-SM parameters. You are also allowed to adjust
parameters related to neighbor discovery, forwarding, DR, RP, join, register, and assert. In
addition, you can configure various filtering policies and the PIM silent function to enhance the
PIM-SM security. PIM-SM supports SSM, PIM BFD, PIM GR, and SPT switchover.
6.3 Configuring Basic PIM-SM Functions
Ensure that unicast routes are reachable before configuring IPv4 multicast routing and enable
PIM-SM on each interface of the multicast device. In this manner, the PIM-SM network can
work normally.
6.4 Adjusting Control Parameters for a Multicast Source
A multicast device can control the forwarding of multicast data based on multicast sources. This
helps to control multicast data flows and limit information that can be obtained by downstream
receivers to enhance security.
6.5 Adjusting Control Parameters of the C-RP and C-BSR
If a dynamic RP is used, you can adjust parameters of C-RPs and C-BSR as required. If there is
no special requirement, default values are recommended.
6.6 Configuring a BSR Administrative Domain
A PIM-SM network can be divided into multiple BSR administrative domains and a global
domain. This effectively reduces the load of a single BSR, and provides a special service for
specific multicast groups.
6.7 Adjusting Control Parameters for Establishing the Neighbor Relationship
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 6 PIM-SM (IPv4) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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