The software package xntp contains
drivers for connecting local reference clocks. A list of supported clocks
is available in the
in the file
Every driver is associated with a number. In xntp,
the actual configuration takes place by means of pseudo IPs. The
clocks are entered in the file
as though they existed in the network.
For this purpose, they are assigned special IP addresses in the form
t stands for the
type of the clock and determines which driver is used
u for unit, which determines the interface used.
Normally, the individual drivers have special parameters that
describe configuration details.
NN is the number of the driver)
provides information about the particular type of clock.
For example, the “type 8” clock
(radio clock over serial interface)
requires an additional mode that specifies the clock more precisely.
The Conrad DCF77 receiver module, for example, has mode 5.
To use this clock as a preferred reference, specify the
server line for a Conrad DCF77
receiver module would be:
server 127.127.8.0 mode 5 prefer
Other clocks follow the same pattern. Following the installation of the
xntp-doc package, the
for xntp is available in the directory
provides links to the driver pages describing the driver parameters.