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[其他] IP PIM DS vs SSM; IPv6; maybe more ...

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发表于 2018-3-13 11:37:10 | 显示全部楼层 |阅读模式
本帖最后由 ttxs1234 于 2018-3-13 22:43 编辑
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(1) Which PIM mcast type requires IGMPv3 and operate WITHOUT RP8 h  g( X" P: [) X& ~# i

% L$ T( ]4 Y9 k( N) l# gDump: PIM-DM
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Correct answer: PIM SSM? (1) SSM creates source tree, and (2)only (s,g) through IGMPv3, and no (*, g) join to RP.* ]5 h9 f# C/ i1 N/ b; I5 ]$ x

9 I4 U4 C6 ?5 N/ o3 h: G, `9 l; r# wAny comments?. u' H7 e$ s: l2 C8 _2 F) e

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An IPv6 network has different MTUs on different segments, if the network is experiencing reliability issues, which option is the most likely reason?
' P' r6 M$ u! U& f; ]A. ICMPv6 is filtered.9 j+ u: x. R& T$ |9 o
B. The Do Not Fragment bit is marked., g6 d  I, L' B) x* J  a* @  h# Y1 C
C. HSRPv6 is configured incorrectly.
* S* B+ V) i, r& l; {+ k) s3 y7 jD. The MTU size is greater than 1470 bytes.3 T( S/ A1 o2 R+ Y( P
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Dump: A
% |2 X0 k; ^) LCorrect one: B?1 Y2 e* Z/ T+ N: u8 B3 T5 R
发表于 2018-3-13 18:17:37 | 显示全部楼层
正确应该是SSM
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8 @" h$ R( ~" E, N0 ]7 J- z8 thttps://www.juniper.net/document ... ticast-pim-ssm.html
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PIM source-specific multicast (SSM) uses a subset of PIM sparse mode and IGMP version 3 (IGMPv3) to allow a client to receive multicast traffic directly from the source. PIM SSM uses the PIM sparse-mode functionality to create an SPT between the receiver and the source, but builds the SPT without the help of an RP.
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发表于 2018-3-13 19:55:59 | 显示全部楼层
SSM should be correct
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发表于 2018-3-13 19:56:42 | 显示全部楼层
https://www.cisco.com/c/en/us/td ... xe-3e/imc-ss-mc.pdf
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; w6 }/ G% t! ?4 f7 @An established network in which IP multicast service is based on PIM-SM can support SSM services. SSM
# W0 v# c# \5 wcan also be deployed alone in a network without the full range of protocols that are required for interdomain
( q2 ?  S# q3 F* `! W7 WPIM-SM. That is, SSM does not require an RP, so there is no need for an RP mechanism such as Auto-RP,7 d4 u6 K1 @- C/ }
MSDP, or bootstrap router (BSR).
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发表于 2018-3-14 10:31:57 | 显示全部楼层
ipv6 选icmp v6没错的,因为path mtu discovery is based on icmp v6

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多谢,有道理  详情 回复 发表于 2018-3-14 20:48
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 楼主| 发表于 2018-3-14 20:48:02 | 显示全部楼层
superblue1999 发表于 2018-3-14 10:31# l6 B6 T+ x) f" E5 m
ipv6 选icmp v6没错的,因为path mtu discovery is based on icmp v6

* E/ ?, i' N1 Z3 G0 N多谢,有道理  
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发表于 2018-8-28 23:13:58 | 显示全部楼层
gongxigongxi
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