Huawei Quidway S9300 Configuration Manual - Multicast page 126

4 PIM-SM Configuration
Applicable Environment
A PIM-SM network can adopt the ASM and SSM models to provide multicast services for hosts.
The integrated components (including the RP) of the ASM model must be configured on the
network first. The range of SSM group addresses is then adjusted as required.
Through IGMP, the S9300 learns that a user wants to join multicast group G.
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The ASM model of PIM-SM supports two kinds of RPs. You can choose a kind of RPs according
to the requirements.
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A multicast domain may be served by a dynamic RP and a static RP. By default, an S9300 prefers
the dynamic RP. If you set static RP to be preferred, the S9300 prefers the static RP.
Different multicast groups match different RPs. Compared with all groups corresponding to an
RP, this can reduce the load of a single RP and enhance the survivability of the network.
Pre-configuration Tasks
Before configuring basic PIM-SM functions, complete the following task:
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Data Preparation
To configure basic PIM-SM functions, you need the following data.
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NOTE
The SSM model needs to be supported by IGMPv3. If a host must run IGMPv1 or IGMPv2, configure
IGMP SSM mapping on the specific interface of the S9300.
If G is in the range of SSM group addresses and source S is specified when the user joins
G through IGMPv3, the SSM model is adopted to provide multicast services.
If G is in the range of the SSM group addresses and the S9300 is configured with the static
(S, G) or SSM mapping rules, the SSM model is adopted to provide multicast services.
If G is not in the range of the SSM group addresses, the ASM model is used to provide
multicast services.
Dynamic RP: To obtain a dynamic RP, you need to select several S9300s in the PIM-SM
domain and configure them as C-RPs and C-BSRs, and then configure the BSR boundary
on the interfaces of S9300s on the boundary of the domain. Each S9300 in the PIM-SM
domain then can automatically obtain the RP.
Static RP: To obtain a static RP, you need to manually configure the RP on each S9300 in
the PIM-SM domain. For the large-scale PIM network, the configuration of a static RP is
complicated. To enhance the survivability and management of the multicast network, the
static RP is usually used as the backup of the dynamic RP.
Configuring the unicast routing protocol to ensure that IP routes of nodes are reachable
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Copyright © Huawei Technologies Co., Ltd.
Quidway S9300 Terabit Routing Switch
Configuration Guide - Multicast
Data
Static RP address
ACL that defines the range of multicast
groups served by a static RP
Priority of a C-RP
Issue 01 (2009-07-28)