[ntp:questions] Re: ntpq -np

Richard B. Gilbert rgilbert88 at comcast.net
Mon Mar 21 18:47:21 UTC 2005

Charles wrote:

>This might be two questions.
>When the ntpq -np command is issued, the second column is labeled REFID.
>The number in the second column are always different from the numbers
>in the first column. I do not unstand the significance of the REFID
>I recognize that they are IP numbers, but what is the relationship?
>The term "reference clock" appears frequently in this newsgroup. It
>that is used to talk about the one clock with an asterisk beside it. Is
The first column is the IP address of a server or an identifier for a 
hardware reference clock (127.127.d.u) where d is a driver number and u 
is the unit number of the clock.  Your local clock is normally  The refid in the second column is a string that identifies 
the time source being used by the server or clock designated in the 
first column.  It may be an IP address or a string such as: .GPS., 
.WWV., .CDMA.   .GPS. designates the Global Positioning System,  .WWV. 
designates a radio clock using the signal from WWV, .CDMA. designates a 
radio clock using the reference signal broadcast by a cellular telephone 
base station.   .INIT. indicates that the association is still 
initializing.  .RSTR. indicates that access is restricted (check your 
restrict statements in ntp.conf). 

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