we all know RP can be configured to be a RP for a certian multicast group:
ip pim send-rp-announce ethernet0 scope 31 group-list 5
access-list 5 permit 18.104.22.168 22.214.171.124
then what about command"ip pim accept-register"? Is there any differnce?
here is an example:
ip pim accept-register list 105
ip access-list extended 105
permit ip any 126.96.36.199 188.8.131.52 ?
I think the first is used to tell other RP what groups he wants to act as the rp for. It is used by AUTORP to decide who is the RP
The second command is releated to communication between the RP and a end device. I suspect you would have issues if you announced that you were the RP for a range but then did not accept register messages from a end device on that range.