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

    Default: 0-00:00:02.000    Value: 0-00:00:01.000-0-00:05:00.000

    Specifies the amount of time the node waits for a response
    to a synchronization request before sending another request
    or declaring a server to be unavailable. The node sends
    three requests before declaring a non-responding server to be
    unavailable.