Huawei quidway s7700 - Configuring the Interval for Retransmitting Graft Messages

To enable new members in the network to receive multicast data quickly, a PIM-DM switch
sends a Graft message through an upstream interface. After receiving the Graft message, the
upstream switch responds immediately with a Graft-Ack message and enables the interface that
receives the Graft message to forward packets.
Switchs can work normally under the control of the default parameter values. Users can adjust
the related parameters according to the specific network environment.
NOTE
If there is no specific requirement, default values are recommended.
Pre-configuration Task
Before configuring control parameters for graft, complete the following tasks:
l Configuring a unicast routing protocol
l Configuring Basic PIM-DM Functions
Data Preparation
To configure control parameters for graft, you need the following data.
No. Data
1 Interval for retransmitting Graft messages
5.8.2 Configuring the Interval for Retransmitting Graft Messages
In PIM-DM mode, when a member joins a pruned group, the multicast device sends a Graft
message and waits for an ACK message from the upstream device. If the downstream device
does not receive any ACK message within a certain period, the device resends the Graft message
until it receives an ACK message from the upstream device.
Context
Do as follows on the PIM-DM switch:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
The interface can be a VLANIF interface, or an Loopback interface.
Step 3 Run:
pim timer graft-retry interval
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 5 PIM-DM (IPv4) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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