|Exam 400-101||Question id=725||Layer 3 Technologies|
Which of the following multicast addresses are using Cisco multicast router for AUTO-RP?
AutoRP messages are sent using multicast addresses 184.108.40.206 and 220.127.116.11. AutoRP dynamically determines the rendezvous point (RP) for a multicast group
so that RPs need not be manually configured. The multicast address 18.104.22.168 is used for RPAnnounce messages, which are sent by candidate RPs to advertise
their eligibility to become an RP. The RPAnnounce messages are received by the mapping agent, which maps the candidate RPs to multicast groups. If multiple
routers are advertised as candidate RPs for a multicast group, the router with the highest IP address is used as the RP for that group. The multicast address
22.214.171.124 is used for RPDiscovery messages, which are sent by mapping agents to advertise the authoritative RP for a multicast group.
Protocol Independent Multicast version 1 (PIMv1) messages are sent using multicast address 126.96.36.199. The multicast address 188.8.131.52 is the allrouters address.
The allrouters address is also used by Internet Group Management Protocol (IGMP).
PIMv2 messages are sent using multicast address 184.108.40.206. The multicast address 220.127.116.11 is the allPIMrouters address. This address is used by PIMv2 to
send status messages, such as hello messages, prune messages, and assert messages. The allPIMrouters address is also used to send Bootstrap Router (BSR)
messages. Like AutoRP, the BSR feature dynamically assigns RPs to multicast groups. However, BSR can be used only by PIMv2; it cannot be used by PIMv1.
Other PIMv2 message types include the Register message, the RegisterStop message, and the Join/Prune message.
VRRP are using 18.104.22.168 address. HSRPv2/GLBP are using 22.214.171.124 address.