Refer to the exhibit. Which two commands must the engineer configure for the company’s PIM-SM network to enable Auto-RP mappings to be sent over the FastEthernet0/0 interface, without affecting normal operation? (Choose two.)
Its AC,
The ip pim autorp-listener allows the specific AutoRP traffic (destined to 224.0.1.39 and 224.0.1.40) to be flooded using dense mode rules across interfaces configured for strict sparse mode. This command has no meaning if using sparse-dense-mode - with this mode, the AutoRP traffic can always be flooded using dense mode rules.
A or D are used to allow Cisco-RP-Announce and Cisco-RP-Discovery multicast messages to be flooded to all PIM enabled routers in the network (although D is not usually recommended).
ip pim autorp listener do not need to be set for sparse-dense mode.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16-5/imc-pim-xe-16-5-book/imc-basic-cfg.html#GUID-08C0EDBD-4A85-4FC3-AF2C-AA930C578F3C
In column Ver/Mode, the "S" stands for sparse mode. So why should pim sparse-mode be enabled again? A is ok. B imho is not correct
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