[j-nsp] weird subinterfaces on T640

[Plz]

there always ll be a subinterface ".32767" on the physical inteface where i
configure a subinterface( not 32767 )
but when i run show configuration there is nothing about this 32767
subinterface.
version:8.3R3.2, pic 10*1GE(LAN), 1000BASE,  T640
have anyone seen this ?  or i m missing something?



aa at aa> show configuration interfaces ge-3/1/4
vlan-tagging;
unit 51 {
    vlan-id 51;
    family inet {
        address 211.136.3.109/30;
    }
}
{master}
aa at aa> show configuration interfaces ge-3/1/5
vlan-tagging;
unit 100 {

    vlan-id 100;
    family inet {
        address 211.136.1.29/30;
    }
    family iso;
}
unit 200 {

    vlan-id 200;
    family inet {
        address 211.136.1.61/30;
    }
    family iso;
}
unit 300 {

    vlan-id 300;
    family inet {
        address 211.136.1.69/30;
    }
    family iso;
}
unit 400 {

    vlan-id 400;
    family inet {
        address 211.136.1.37/30;
    }
    family iso;
}
unit 500 {

    vlan-id 500;
    family inet {
        address 211.136.1.45/30;
    }
    family iso;
}
unit 600 {

    vlan-id 600;
    family inet {
        address 211.136.1.53/30;
    }
    family iso;
}
unit 700 {

    vlan-id 700;
    family inet {
        address 211.136.1.77/30;
    }
    family iso;
}

{master}
aa at aa> show interfaces terse ge-3/1/4
Interface               Admin Link Proto    Local                 Remote
ge-3/1/4                up    down
ge-3/1/4.51             up    down inet     211.136.3.109/30
ge-3/1/4.32767          up    down

{master}
aa at aa> show interfaces terse ge-3/1/5
Interface               Admin Link Proto    Local                 Remote
ge-3/1/5                up    up
ge-3/1/5.100            up    up   inet     211.136.1.29/30
                                   iso
ge-3/1/5.200            up    up   inet     211.136.1.61/30
                                   iso
ge-3/1/5.300            up    up   inet     211.136.1.69/30
                                   iso
ge-3/1/5.400            up    up   inet     211.136.1.37/30
                                   iso
ge-3/1/5.500            up    up   inet     211.136.1.45/30
                                   iso
ge-3/1/5.600            up    up   inet     211.136.1.53/30
                                   iso
ge-3/1/5.700            up    up   inet     211.136.1.77/30
                                   iso
ge-3/1/5.32767          up    up