Multicast only flows with ip igmp join-group command

Hi,

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I'm facing a issue where we working in a PIM/IGMP environment. We have a dedicated connection to our IPTV service provider. (IP of the provider 10.200.37.2) The service provider has is own PIM network what we can't join. They have a passive pim interface on that site. We also have the same setup in our site.

We can only join the stream when we do a ip igmp join-group multicastadres on the 150 VLAN*.* In all documentation of Cisco they said that is cpu processed, (software switches) i dont see that in the CPU utilization (PRTG) but not the way to go?When joined the stream will flow in our pim environment to the clients. Is also work if we do a IGMP helper (10.200.37.2) on the VLAN (VLAN 60) where the setupboxes are running. In my opion we woudnt want that all the client traffic of igmp joins going to the provider. What is one STB leave a group an another watching the stream? Stream gonna stop ?

What can we do so this going to work without the ip igmp join-group under the interface. We running a Cisco Catalyst C9300 stack.

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interface Vlan150
description *** IPTV Provider ***
vrf forwarding IPTV
ip address 10.200.37.1 255.255.255.248
no ip redirects
ip pim neighbor-filter 10
ip pim passive
ip igmp join-group 224.0.252.126
ip igmp join-group 224.0.252.127
ip igmp join-group 224.0.252.128
etc
etc
etc
!
interface Vlan60
description *** Test VLAN to STBs ***
vrf forwarding IPTV
ip address 192.168.60.1 255.255.255.0
no ip redirects
ip pim sparse-mode
!
ip mroute vrf IPTV 0.0.0.0 0.0.0.0 10.200.37.2
!
ip pim vrf IPTV rp-address 10.200.37.2
!
access-list 10 deny any