Huawei quidway s7700 - Enabling the Function of Tracking a Downstream Neighbor

switch does not support the DR priority, the interface with the largest IP address acts
as the DR.
----End
6.7.4 Enabling the Function of Tracking a Downstream Neighbor
When the Generation ID option in the Hello message received from an upstream neighbor
changes, it indicates that the status of the upstream neighbor changes. Therefore, you can
configure a PIM interface to deny the Hello messages without Generation ID options to obtain
the upstream neighbor status in real time.
Context
Do as follows on the PIM-SM switch:
NOTE
The configuration involves the following cases:
l Global configuration: It is valid on all the interfaces.
l Configuration on the interface: The configuration on an interface takes precedence over the global
configuration. If the configuration on an interface is not done, the global configuration is used.
Procedure
l Global configuration
1. Run:
system-view
The system view is displayed.
2. Run:
pim [ vpn-instance vpn-instance-name ]
The PIM view is displayed.
3. Run:
hello-option neighbor-tracking
The function of tracking a downstream neighbor is enabled.
After this function is enabled, information about the downstream neighbor who has
sent a Join message and whose Join state does not times out is recorded.
NOTE
The function of tracking downstream neighbors cannot be implemented unless all the PIM
switchs in the shared network segment are enabled with this function.
l Configuration on an interface
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
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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