Mcast Commands

ip pim accept-rp
To configure a router to accept join or prune messages destined for a specified rendezvous point (RP) and for a specific list of groups:

ip pim [vrf vrf-name] accept-rp {rp-address | auto-rp} [access-list]
The following example states that the router will accept join or prune messages destined for the RP at address 172.17.1.1 for the multicast group 224.2.2.2:

ip pim accept-rp 172.17.1.1 3
access-list 3 permit 224.2.2.2

ip pim accept-register
To configure a candidate rendezvous point (RP) router to filter Protocol Independent Multicast (PIM) register messages, use the ip pim accept-register command.

ip pim [vrf vrf-name] accept-register {list access-list | route-map map-name} 

The following example shows how to restrict the RP from allowing sources in the Source Specific Multicast (SSM) range of addresses to register with the RP. These statements need to be configured only on the RP.
ip pim accept-register list no-ssm-range
ip access-list extended no-ssm-range
 deny ip any 232.0.0.0 0.255.255.255
 permit ip any any

no ip pim rp-address bug
If the access-list is removed before issuing no ip rp-address statement, we see Access list associated with RP must be standard on the console.
The work-around is to create an empty list and then try the 'no' and remove the command.
 
SW2(config)#no ip pim rp-address 150.1.5.5 10
Access list associated with RP must be standard.
SW2(config)#
SW2(config)#do sh run | i access-list       
ip access-list standard GROUP
SW2(config)#
SW2(config)#ip access-list st 10
SW2(config-std-nacl)#exit
SW2(config)#
SW2(config)#no ip pim rp-address 150.1.5.5 10
SW2(config)#