A network operator needs to implement PIM-SSM multicast configuration on a customer's network so that users in different domains are able to access and stream live traffic. Which two actions must the engineer perform on the network to make the streaming work? (Choose two.)
To implement PIM-SSM multicast configuration, it is crucial to enable IGMP version 3 at the interface level because IGMPv3 supports the source-specific multicast (SSM) capabilities that PIM-SSM relies on. Additionally, enabling PIM sparse mode on the device is necessary as PIM-SSM operates within the sparse mode framework. MSDP and dense mode are not required for PIM-SSM; hence, these options are not relevant.
A and C are the correct answers. SSM is suitable for use when there are well-known sources either within the local PIM domain or within another PIM domain. The MSDP, which is needed for interdomain multicast routing when regular PIM-SM is used within a domain, is no longer needed for SSM. ^ This is as per Cisco
it's correct AC https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_2/mcst_p2.html#wp1186721
In SSM we dont need RP, MSDP and so on anymore, just Sparse mode and igmpv3 https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/concept/multicast-pim-ssm.html
not AC?
Enabling PIM-Sparse mode is required to use SSM, however the question also states that the users are in different domains, so MSDP is used to connect multiple PIM-SSM domains.
but why do we need MSDP is SSM? there are no RP, RP mappings and so on. I think AC is the correct answer
igmp v3 and pim ...
The correct answers for the question are: A. Enable IGMP version 3 at the interface level. C. Enable PIM sparse mode on the device. MSDP is not needed in PIM-SSM
there is no need to manage MSDP for SSM between PIM domains
An SSM-configured network has distinct advantages over a traditionally configured PIM sparse-mode network. There is no need for shared trees or RP mapping (no RP is required), or for RP-to-RP source discovery through MSDP. https://www.juniper.net/documentation/us/en/software/junos/multicast/topics/concept/multicast-pim-ssm.html
A and D are correct The SSM network scenario used in this document is based on the hypothetical interdomain ISP network scenario described in the "Interdomain Multicast Solutions Using MSDP" document. Figure 1 https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_2/mcst_p2.html