Library /sys$common/syshlp/nclhelp.hlb set, llc2, sap, link, retry_maximum  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: 10            Value: 1-255

    Specifies the maximum number of times the link retransmits a frame
    before assuming a fatal error and taking more drastic recovery
    action.