Huawei quidway s7700 - Configuring Basic PIM-SM Functions; Establishing the Configuration Task

any PIM packet. Then all PIM neighbors and PIM state machines on the interface are deleted.
The interface acts as the static DR and immediately takes effect. At the same time, IGMP on the
interface are not affected.
Multi-Instance PIM
In multi-instance applications, a multicast switch needs to maintain the PIM neighbor list,
multicast routing table, BSR information, and RP-Set information for different VPN instances
and keep the information independent between the instances. The switch functions as multiple
multicast switchs running PIM independently.
When a switch receives a data packet, it needs to differentiate which VPN instance the packet
belongs to and forward it based on the multicast routing table of that VPN instance, or create
PIM-related multicast routing entries in that VPN instance.
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.
6.3.1 Establishing the Configuration Task
Before configuring basic PIM-SM functions, configure an IPv4 unicast routing protocol.
Applicable Environment
A PIM-SM network can adopt the ASM and SSM models to provide multicast services for user
hosts. The integrated components (including the RP) of the ASM model must be configured in
the network first. The SSM group address range is then adjusted as required.
NOTE
The SSM model is only supported in IGMPv3. If user hosts must run IGMPv1 or IGMPv2, configure IGMP
SSM mapping on switch interfaces.
Through IGMP, a switch knows the multicast group G that a user wants to join.
l If G is in the SSM group address range and the source S is specified when the user joins G
through IGMPv3, the SSM model is used to provide multicast services.
l If G is in the SSM group address range and the switch is configured with the (S, G) SSM
mapping rules, the SSM model is used to provide multicast services.
l If G is not in the SSM group address range, the ASM model is used to provide multicast
services.
In the PIM-SM network, the ASM model supports the following methods to obtain an RP. You
can select the method as required.
l Static RP: To obtain a static RP, manually configure RP on each switch in the PIM-SM
domain. For the large-scale PIM network, configuring the static RP is complicated. To
enhance the robustness and the operating management of the multicast network, the static
RP is usually used as the backup of the BSR-RP.
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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