Library /sys$common/syshlp/nclhelp.hlb set, osi_transport, congestion_avoidance  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: False          Value: True or false

    Enables the use of the automatic congestion avoidance mechanism
    to reduce the transport window size in response to an indication
    from the Network layer when operating on the Connectionless
    Network Service (CLNS).

    set [node node-id] osi transport congestion avoidance boolean

    Example:

    set osi transport congestion avoidance false