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IGMP Proxy
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Hello, I'm cisco newbie and I'm trying to setup a Cisco7200 router to
act as an IGMP proxy, which does not work. The goal is to have
Multicast Join messages come into the GigabitEthernet1/0 interface and
have the Cisco7200 simply send it out the GigabitEthernet2/0 interface.
Here's my current setup.

interface GigabitEthernet2/0
ip address
ip pim dense-mode
no ip route-cache cef
no ip route-cache
ip igmp unidirectional-link
ip igmp mroute-proxy GigabitEthernet1/0
ip igmp proxy-service
no negotiation auto

interface GigabitEthernet1/0
ip address
ip pim sparse-mode
no ip route-cache cef
no ip route-cache
no ip mroute-cache
negotiation auto
no cdp enable

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The following commands seemed to do the trick. The cisco docs describe
this as setting up a "stub router". I don't know if that's synonmous
with IGMP proxy.

c7200#conf terminal
Enter configuration commands, one per line. End with CNTL/Z.
c7200(config)#int gigabitEthernet 1/0
c7200(config-if)#ip igmp helper-address

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