IP PIM DS vs SSM; IPv6; maybe more ...

ttxs1234

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(1) Which PIM mcast type requires IGMPv3 and operate WITHOUT RP

5 y8 z0 Q) B  s& ODump: PIM-DM
3 o' s- ^! {+ ?7 Z
" Q# T4 ~9 M8 _* L5 l9 _2 y2 \5 W) \Correct answer： PIM SSM？ （1) SSM creates source tree, and (2）only (s,g) through IGMPv3, and no (*, g) join to RP.
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& D: K+ a# c5 Z; |2 y3 l* M# ~Any comments?
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- o- x& M& [+ n7 I+ ^$ t(2)
An IPv6 network has different MTUs on different segments, if the network is experiencing reliability issues, which option is the most likely reason?
A. ICMPv6 is filtered.
0 z! h5 u8 d& h% f! g$ X) tB. The Do Not Fragment bit is marked.
C. HSRPv6 is configured incorrectly.
6 g6 }2 x  D# \" w" GD. The MTU size is greater than 1470 bytes.
) l- \/ A- A/ X+ Z8 ]0 b

Dump: A
Correct one: B?
! x  A) |. n. D6 j

superblue1999

正确应该是SSM
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https://www.juniper.net/document ... ticast-pim-ssm.html

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.

lyh1996822

xxie

superblue1999

SSM should be correct

superblue1999

https://www.cisco.com/c/en/us/td ... xe-3e/imc-ss-mc.pdf

An established network in which IP multicast service is based on PIM-SM can support SSM services. SSM
can also be deployed alone in a network without the full range of protocols that are required for interdomain
PIM-SM. That is, SSM does not require an RP, so there is no need for an RP mechanism such as Auto-RP,
( h5 M8 c$ h% Y6 gMSDP, or bootstrap router (BSR).

superblue1999

ipv6 选icmp v6没错的，因为path mtu discovery is based on icmp v6

ttxs1234

superblue1999 发表于 2018-3-14 10:31
ipv6 选icmp v6没错的，因为path mtu discovery is based on icmp v6

0 w6 Q' _  M% @多谢，有道理  

hellben

gongxigongxi