22. ipAddressStatus should be a TC if it needs to exist at all.
    I am not sure how useful all these states are and if
    two implementations will even come close in terms
    of using them the same way.
        
    a) If I assign an interface to a port, 
       it goes preferred, then I 
       delete the assignment, the state goes either to 
       deprecated and at some time, the row is aged out 
       or the row simply will fail to exist.
    b) The inaccessible(4) value is unnecessary. It is simple
       to scan the ifTable corresponding to ipAddressIfIndex
       and determine state. 
    c) I doubt invalid(3) would ever be used. 
    d) duplicate() - this is interesting idea, but
       not sure how useful it is and at what time the status
       of this object would transfer out of duplicate state
       once entered.
    e) is tentative only applicable to IPv6?

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Dave:

No.  Most stacks do gratuitous ARP for duplicate
Address detection when adding a new IPv4 address.
Hence, the same tentative state exists.