Adjusting Control Parameters for Assert
You can configure the period for keeping the Assert state of a switch interface.
Adjusting Control Parameters for SPT Switchover
You can adjust the conditions of the SPT switchover and the interval for checking the forwarding
rate of multicast data.
IPv6 BFD for PIM
The S7700 supports IPv6 BFD for PIM for detecting the status of the link on the shared network
segment within milliseconds and fast responding to the fault on the PIM neighbor.
IPv6 BFD for PIM detects the current DR or Assert winner status on the shared network segment.
When a fault occurs on the interface, BFD immediately instructs the PIM module to trigger a
new DR election or Assert election rather than waits until the neighbor relationship or the Assert
timer times out. This reduces the discontinue period of multicast data transmission and thus
improves the reliability of multicast data transmission.
PIM GR
The S7700 supports the PIM GR function on the switch with double MPUs. PIM GR ensures
normal multicast data forwarding during master-slave switchover of the switch.
Configuring PIM Silent
On the access layer, the switch interface directly connected to hosts needs to be enabled with
PIM. You can establish a PIM neighbor on the switch interface to process various PIM packets.
The configuration, however, has the security vulnerability. When a host maliciously generates
PIM Hello packets and sends the packets in large quantity, the switch may break down.
To prevent the preceding case, you can set the status of the switch interface to PIM Silent (that
is, PIM pasive state). When the interface is in the PIM silent state, the interface is prohibited
from receiving and forwarding any PIM packet. Then all PIM neighbors and PIM state machines
on the interface are deleted. The interface acts as the static DR and immediately takes effect. At
the same time, MLD on the interface are not affected.
13.3 Configuring Basic PIM-SM (IPv6) Functions
Ensure that unicast routes are reachable before configuring IPv6 multicast routing and enable
IPv6 PIM-SM on each interface of the multicast device. In this manner, the IPv6 PIM-SM
network can work normally.
13.3.1 Establishing the Configuration Task
Before configuring basic IPv6 PIM-SM functions, configure a unicast IPv6 routing protocol.
Applicable Environment
A PIM-SM network can adopt the ASM and SSM models to provide multicast services for hosts.
The integrated components (including the RP) of the ASM model must be configured in the
network first. The SSM group address range is then adjusted as required.
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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