igmp-proxy {
    interface eth0 {
        alt-subnet 0.0.0.0/0
        role downstream
        threshold 1
        whitelist 0.0.0.0/0
    }
    interface eth1 {
        role disabled
        threshold 1
    }
    interface eth1.4 {
        alt-subnet 0.0.0.0/0
        role upstream
        threshold 1
        whitelist 0.0.0.0/0
    }
    interface eth1.34 {
        role disabled
        threshold 1
    }
}