Library /sys$common/syshlp/nclhelp.hlb set, nsp, 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.
    This mechanism reduces the transport window size in response to
    an indication from the Network layer.

    set [node node-id] nsp congestion avoidance boolean

    Example:

    set nsp congestion avoidance false