Adjusting Control Parameters For Forwarding; Establishing The Configuration Task - Huawei Quidway s3700 series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Multicast

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.

7.9.1 Establishing the Configuration Task

After basic functions of PIM-SM are configured, you can adjust related control parameters of
forwarding relationship maintenance, and configure the Join information filtering and neighbor
filtering functions to enhance security as required.
Applicable Environment
The configurations in this section are applicable to the ASM model and the SSM model.
When the first member of a group appears in the network segment, the switch sends a Join
message through an upstream interface, requiring the upstream switch to forward packets to the
network segment.
When the last member of the group leaves, the switch sends a Prune message through an upstream
interface, requiring the upstream switch to perform the Prune action and to stop forwarding
packets to this network segment. If other downstream switchs in this network segment still want
to receive data of this group, they must send a Join message to override the Prune action.
In the ASM model, a switch periodically sends Join messages to the RP to prevent RPT branches
from being deleted due to timeout.
The switch can work normally under the control of default values. The S3700 allows users to
adjust the parameters as required.
Pre-configuration Tasks
Before adjusting control parameters for forwarding, complete the following tasks:
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l
Data Preparation
To adjust control parameters for forwarding, you need the following data.
No.
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Issue 01 (2011-10-26)
NOTE
It is recommended to adopt default values if there is no special requirement.
Configuring a certain unicast routing protocol
Configuring Basic PIM-SM Functions
Data
Delay for transmitting Prune messages
Period of overriding the Prune action
Timeout period of the Prune state
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7 PIM-SM (IPv4) Configuration
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