This article gives an example for configuring OSPF on channelized interface.

Configuring OSPF on each of the port channelized interfaces:

{master:0}[edit]
root@jtac-QFX5200-32C-r1004# show interfaces
et-0/0/2:0 {
    unit 0 {
        family inet {
            address 1.1.0.4/24;
        }
    }
}
et-0/0/2:1 {
    unit 0 {
        family inet {
            address 1.1.1.4/24;
        }
    }
}
et-0/0/2:2 {
    unit 0 {
        family inet {
            address 1.1.2.4/24;
        }
    }
}
et-0/0/2:3 {
    unit 0 {
        family inet {
            address 1.1.3.4/24;
        }
    }
}

{master:0}[edit]
root@jtac-QFX5200-32C-r1004# show protocols ospf
area 0.0.0.0 {
    interface et-0/0/2:0.0;
    interface et-0/0/2:1.0;
    interface et-0/0/2:2.0;
    interface et-0/0/2:3.0;
}

{master:0}[edit]
root@jtac-QFX5200-32C-r1004#

You should have four neighbors:

{master:0}[edit]
root@jtac-QFX5200-32C-r1004# run show ospf neighbor
Address          Interface              State     ID               Pri  Dead
1.1.0.5          et-0/0/2:0.0           Full      1.1.0.5          128    39
1.1.1.5          et-0/0/2:1.0           Full      1.1.0.5          128    38
1.1.2.5          et-0/0/2:2.0           Full      1.1.0.5          128    37
1.1.3.5          et-0/0/2:3.0           Full      1.1.0.5          128    37

• This applies to 40G interfaces, with the note that you can channelize to 10G (therefore 4 times 10G).