Huawei Quidway s3700 series Configuration Manual page 149

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast
Multicast devices establish PIM neighbor relationships and negotiate various control parameters
by exchanging Hello messages. You can adjust the parameters carried in Hello messages as
required. If there is no special requirement, adopt default values.
7.8 Adjusting Control Parameters for Source Registering
In a PIM-SM network, the DR directly connected to the multicast source encapsulates multicast
data in a Register message and sends it to the RP in unicast mode. The RP then decapsulates the
message, and forwards the multicast data to receivers along the RPT. The system supports the
Register message filtering and suppression functions.
7.9 Adjusting Control Parameters for Forwarding
A multicast device sends Join messages upstream to require to forward multicast data and Prune
messages upstream for requiring to stop forwarding multicast data. You can adjust control
parameters for multicast data forwarding as required. If there is no special requirement, adopt
default values.
7.10 Adjusting Control Parameters for Assert
If a multicast device can receive multicast data through the downstream interface, this indicates
that other upstream devices exist in this network segment. The device then sends an Assert
message through the downstream interface to take part in the election of the unique upstream
device.
7.11 Configuring the SPT Switchover
A high volume of multicast data traffic increases the load of an RP, and may result in a fault.
To solve this problem, PIM-SM allows the RP or the DR at the group member side to trigger
the SPT switchover when the rate of multicast packets is high.
7.12 Configuring PIM BFD
After detecting a fault on the peer, BFD immediately notifies the PIM module to trigger a new
DR election rather than waits until the neighbor relationship times out. This shortens the period
during which multicast data transmission is discontinued and thus improves the reliability of
multicast data transmission.
7.13 Maintaining PIM-SM (IPv4)
Maintaining PIM-SM involves resetting PIM statistics, and monitoring PIM running status.
7.14 Configuration Examples
Configuration examples are provided to show how to construct a basic PIM-SM network and
configure basic functions of PIM-SM.
Issue 01 (2011-10-26) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7 PIM-SM (IPv4) Configuration
136