The NTP protocol specifies that systems should have a maximum oscillator frequency tolerance of plus or minus 100 parts-per-million (ppm). This tolerance allows relatively inexpensive workstation platforms to use the NTP protocol. For platforms that meet this tolerance, NTP automatically compensates for the frequency errors of the individual oscillator, such that no additional adjustments are required to either the configuration file or to various kernel variables.
However, some platforms routinely violate this tolerance, and their violation can affect other time servers or time clients in a network. Although the LSMS meets the tolerance requirement, if your network contains other systems that do not meet the tolerance requirement, you may need to adjust the values of certain kernel variables.