# Multicast PIM Accept Register

**URL:** <https://forum.networklessons.com/t/multicast-pim-accept-register/988>\
**Category:** Lessons Discussion\
**Created:** [December 26, 2016, 5:42pm UTC](https://forum.networklessons.com/t/multicast-pim-accept-register/988 "2016-12-26T17:42:24Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jamayassin](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/j/bcef8e/32.png) [@jamayassin](https://forum.networklessons.com/u/jamayassin)\
**Post date:** [August 20, 2017, 4:56am UTC](https://forum.networklessons.com/t/multicast-pim-accept-register/988/2 "2017-08-20T04:56:49Z")

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Hi Rene,

I setup up lab for 4 routers to allow one router and block other router, it’s not working, but for two routers like your lab its working.

 ![PIM Accept-Register LAB](https://cdn-forum.networklessons.com/uploads/default/original/1X/8209d66f9bd998792d6418964fce5d026e04f317.JPG)

in this LAB I want to filter R1 as source to R4 which is configured group address 239.9.9..9, but its allowing all sources.

Configuration

```
R1

interface GigabitEthernet1/0
 ip address 12.12.12.1 255.255.255.0
 ip pim sparse-mode
 negotiation auto
end
!
ip pim rp-add 2.2.2.2

```

R2

```
interface GigabitEthernet1/0
 ip address 12.12.12.2 255.255.255.0
 ip pim sparse-mode
 negotiation auto
!
interface GigabitEthernet2/0
 ip address 24.24.24.2 255.255.255.0
 ip pim sparse-mode
 negotiation auto
!
interface FastEthernet0/0
 ip address 23.23.23.2 255.255.255.0
 ip pim sparse-mode
 duplex half
!
ip pim rp-address 2.2.2.2
ip pim accept-register list Source
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
 ip pim sparse-mode
!
ip access-list extended Source
 deny ip host 12.12.12.1 host 239.9.9.9
 permit ip any any

```

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