Multicast-PIM Accept Register

Rendezvous Point are specifies the sources that are allowed to register with the RP. Every register message contains the original multicast packet, which includes the IP address of the multicast source and the group destination address. If the RP denies the registration, it sends a PIM Register-Stop to the DR immediately and never builds the SPT toward the source.

By default all sources are allowed to register at the RP (Rendezvous Point) when using PIM sparse mode.
This PIM register message contains the original multicast packet from the source, and it includes the IP address of the source and the destination multicast group address. RP can be configured to filter certain sources, RP will send a PIM register-stop message to the PIM DR so that it will not build the SPT towards the source.



R2 #
ip multicast-routing
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.0
!
interface FastEthernet0/0
 ip address 12.1.1.2 255.255.255.0
 ip pim sparse-mode
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 23.1.1.2 255.255.255.0
 ip pim sparse-mode
 duplex auto
 speed auto
!
ip pim rp-address 2.2.2.2
ip pim accept-register list DENY-REGISTER
!
ip access-list extended DENY-REGISTER
 permit ip host 1.1.1.1 224.10.10.0 0.0.0.255
 deny   ip any any


R4#
R4(config-if)#do show run int lo0
!
interface Loopback0
 ip address 4.4.4.4 255.255.255.0
 ip igmp join-group 224.10.10.10
 ip igmp join-group 224.44.44.44
end








R1#ping 224.44.44.44