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doc: add question about reference ID to FAQ

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Miroslav Lichvar 2016-06-07 11:08:47 +02:00
parent 89ac745184
commit 5cadaf8d55
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doc/faq.adoc
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@ -285,6 +285,19 @@ configuration file needs to specify a file which contains keys (`keyfile`
directive) and which key in the key file should be used for `chronyc`
authentication (`commandkey` directive).
=== Why does `chronyc tracking` always print an IPv4 address as reference ID?
The reference ID is a 32-bit value and is always printed in quad-dotted
notation, even if the reference source doesn't have an IPv4 address. For IPv4
addresses, the reference ID is equal to the address, but for IPv6 addresses it
is the first 32 bits of the MD5 sum of the address. For reference clocks, the
reference ID is the value specified with the `refid` option in the `refclock`
directive.
If you need to get the IP address of the current reference source, use the `-n`
option to disable resolving of IP addresses and read the second field (printed
in parentheses) on the `Reference ID` line.
=== Is the `chronyc` / `chronyd` protocol documented anywhere?
Only by the source code. See _cmdmon.c_ (`chronyd` side) and _client.c_