In case anyone wants to dump the centurylink box and use a cisco router instead - here's a working config:
version 15.5
service timestamps debug datetime msec
service timestamps log datetime msec localtime show-timezone year
service password-encryption
service unsupported-transceiver
no platform punt-keepalive disable-kernel-core
!
hostname Int0rw3bz
!
boot-start-marker
boot-end-marker
!
!
vrf definition Mgmt-intf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
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no aaa new-model
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ip domain name
ip multicast-routing distributed
!
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subscriber templating
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
license udi pid ASR1001 sn
license boot level advipservices
!
spanning-tree extend system-id
!
redundancy
mode none
!
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interface GigabitEthernet0/0/0
no ip address
negotiation auto
!
interface GigabitEthernet0/0/0.201
encapsulation dot1Q 201
ip address dhcp
ip nat outside
ip pim sparse-mode
ip igmp proxy-service
!
interface GigabitEthernet0/0/1
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/0/2
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/0/3
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/1/0
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/1/1
ip address 172.16.1.1 255.255.255.0
no ip redirects
ip nat inside
ip pim sparse-mode
ip igmp helper-address 207.108.176.18
ip igmp query-interval 15
ip igmp proxy-service
negotiation auto
!
interface GigabitEthernet0/1/2
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/1/3
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0/1/4
no ip address
shutdown
negotiation auto
!
interface GigabitEthernet0
vrf forwarding Mgmt-intf
no ip address
negotiation auto
!
ip nat inside source list NAT interface GigabitEthernet0/0/0.201 overload
ip forward-protocol nd
!
no ip http server
no ip http secure-server
ip tftp source-interface GigabitEthernet0
ip dns server
ip pim rp-address 207.108.176.18
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0.201 dhcp
ip ssh version 2
!
ip access-list extended NAT
remark access list for NAT
permit ip 172.16.1.0 0.0.0.255 any
permit ip 172.16.2.0 0.0.0.255 any
!
!
!
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control-plane
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line con 0
logging synchronous
stopbits 1
line aux 0
stopbits 1
line vty 0 4
exec-timeout 5 0
login
transport input ssh
line vty 5 97
exec-timeout 5 0
login
transport input ssh
!
!
end
I found the multicast stream source by looking in my ip route table.
#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR
Gateway of last resort is 97.117.2.254 to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via 97.117.2.254, GigabitEthernet0/0/0.201
97.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 97.117.2.0/24 is directly connected, GigabitEthernet0/0/0.201
L 97.117.2.216/32 is directly connected, GigabitEthernet0/0/0.201
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.1.0/24 is directly connected, GigabitEthernet0/1/1
L 172.16.1.1/32 is directly connected, GigabitEthernet0/1/1
207.108.176.0/32 is subnetted, 1 subnets
S 207.108.176.18 [254/0] via 97.117.2.254, GigabitEthernet0/0/0.201
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