Configuring An Anycast Rp In A Pim-Sm Domain; Establishing The Configuration Task - Huawei Quidway S7700 Configuration Manual - Multicast

Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast
Minimum TTL to forward SA with encapsulated data: 0
SAs learned from this peer: 0, SA-cache maximum for the peer: none
Input queue size: 0, Output queue size: 0
Counters for MSDP message:

7.4 Configuring an Anycast RP in a PIM-SM Domain

Anycast RP indicates that when multiple RPs with the same address reside in the same PIM-SM
domain and MSDP peer relationships are set up between these RPs, IP routing automatically
selects the topologically closest RP for each source and receiver. In this manner, burdens on a
single RP are released, RP backup is implemented, and the forwarding path is optimized.

7.4.1 Establishing the Configuration Task

You can configure anycast RP in the scenario where devices in a PIM-SM domain are reachable,
PIM-SM is enabled on the interfaces configured with multicast routing, and no RP is configured
in the network.
Applicable Environment
In a traditional PIM-SM domain, each multicast group can be mapped to only one RP. When
the network is overloaded or the traffic is too concentrated, many network problems are caused.
For example, the pressure of the RP is too heavy, switchs converge slowly after the RP fails,
and the multicast forwarding path is not optimal.
After anycast RPs are applied in a PIM-SM domain, the source registers with the nearest RP and
hosts sends Join messages to the nearest RP. That is, the load of a single RP is abated, the RP
backup is implemented, and the forwarding path is optimized.
The recommended configuration solutions are as follows:
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Pre-configuration Tasks
Before configuring an anycast RP in a PIM-SM domain, complete the following tasks:
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Issue 01 (2011-07-15)
Policy to accept SA-Request messages: none
Sending SA-Requests status: disable
Count of RPF check failure: 0
Incoming/outgoing SA messages: 0/0
Incoming/outgoing SA requests: 0/0
Incoming/outgoing SA responses: 0/0
Incoming/outgoing data packets: 0/0
Peer authentication type: KeyChain
Configure loopback interfaces on multiple switchs in the PIM-SM domain respectively,
assign the same IP address to the loopback interfaces, and advertise the IP address by using
unicast routes.
Configure the loopback interfaces on the switchs as C-RPs or configure the address of the
loopback interface as a static RP on all switchs in the PIM-SM domain.
Set up the MSDP peer relationship between the switchs. If the number of switchs is greater
than three, it is recommended to set up the MSDP peer relationship between the switchs
and configure them to join the same mesh group.
Specify the logical RP address to transmit SA messages between the MSDP peers.
Configuring a unicast routing protocol to implement interconnection at the network layer
Enabling IP multicast
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Peer authentication: configured
7 MSDP Configuration
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