Huawei quidway s7700 - Checking the Configuration; Configuring PIM GR (Ipv6); Establishing the Configuration Task

The PIM view is displayed.
Step 3 Run:
timer spt-switch interval
The interval for checking the forwarding rate of multicast data is set.
By default, the DR at the receiver side performs SPT switchover after receiving the first multicast
data packet.
NOTE
Before configuring the timer spt-switch command, run the spt-switch-threshold command to set the
threshold of the rate that will trigger SPT switchover. Otherwise, timer spt-switch does not take effect.
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13.10.4 Checking the Configuration
After the control parameters for SPT switchover are adjusted, you can run commands to check
entries in the PIM routing table.
Procedure
l Run the display pim ipv6 interface [ interface-type interface-number | up | down ]
[ verbose ] command to check information about PIM-IPv6 interfaces.
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13.11 Configuring PIM GR (IPv6)
In an IPv6 PIM-SM network, PIM GR can be applied to a device with dual main control boards
to ensure normal multicast data forwarding during master-slave switchover.
13.11.1 Establishing the Configuration Task
After basic functions of IPv6 PIM-SM are configured, you can configure PIM GR to improve
PIM network reliability.
Applicable Environment
In some multicast applications, the switch may need to perform active/standby switchover. After
active/standby switchover, the new active main control board deletes the forwarding entries on
the interface board and re-learns the PIM routing table and multicast routing table. During this
process, multicast traffic is interrupted.
In the PIM-SM/SSM network, PIM Graceful Restart (GR) can be applied to the switch with dual
main control boards to ensure normal multicast traffic forwarding during active/standby
switchover.
The active main control board of the switch backs up PIM routing entries and Join/Prune
information to be sent upstream to the standby main control board. The interface board keeps
forwarding entries. Therefore, after active/standby switchover, the switch can actively and fast
send Join messages upstream to maintain the Join state of the upstream. Then, the PIM protocol
sends Hello messages carrying new Generation ID to all switchs enabled with PIM-SM. When
the downstream switch finds that the Generation ID of its neighbor changes, it sends a Join/
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 13 PIM-SM (IPv6) Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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