Library /sys$common/syshlp/latcp$help.hlb ZERO_COUNTERS, Qualifiers, /LINK  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /LINK[=link-name]

    Specifies the link (on your local node) for which you want
    counters reset. If you do not specify a link name, LATCP zeroes
    counters for the link LAT$LINK.