02_5_2_组播PIM-SM-SSM

2019年7月27日 02:04 作者：金淼淋分类：Multicast  564

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YES LAB
Source Specific Multicast
具体源的组播

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Objectives
YES LAB
Upon completion Of this lesson, you will be able
to perform the following tasks:
一 Describe the principles Of Source-Specific
Multicast 能够解释基于源的组播
一 Explain the need for IGMPv3 when depioying SSM
解释在部署 SSM 时需要 IGM Pv3

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Source Specific Multicast
简化知名源的解决方案，特别是一对多多播
· Simplify solution for well-known sources, particularly
for one-to-many multicast.
· Benefits:
_ Allow immediate use Of shortest forwarding path to a
specific sou rce, without need to create shared tree.
允许立即使用到特定源的最短转发路径，而无需创建共享树

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P | M SSM Configuration
YES LAB
()o nfig)#
ip pim ssm [default | range access-list]
· Configures the Source Specific Multicast (SSM) and defines the
range Of 甲 multicast addresses for SSM.
一 Default - defines the SSM range access list 232 ． 0 ． 0 ． 0 / 8
Range access-list - defines the range with the standard
access list

Source Specific Multicast Exa
YES LAB
Source
Host learns of source, group/port
Last-hop learns of source, group/port
Last-hop sends PIM (S,G) Join directly
PIM (S, G) Join
IGMPv3 (S, G) Join
B
c
Receiver 1
Out-of-band
source Erectory,
example: web server

YES LAB
1.1.1.12
1.1.1.10
HI
IGMPv3
1.1.1.11
oin to
232.1.2.3
source _ list
1.1.1.1
rtr-a
• Host sends IGMPv3 Join for group and can specify a list of sources to
explicitly include (IGMPv2 reports group only).
• Router adds membership.
• Router send (S,G) Join directly to sources in the source_list, and is not
required to send ( * G) Join to RP (must not send ( * G) Join in 232/8).