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#!rsc by RouterOS
# RouterOS script: rotate-ntp
# Copyright (c) 2013-2022 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# rotate the ntp servers
# https://git.eworm.de/cgit/routeros-scripts/about/doc/rotate-ntp.md
:local 0 "rotate-ntp";
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global NtpPool;
:global RotateNtpResolveFailed;
:global LogPrintExit2;
:local Ntp1;
:local Ntp2;
:if ([ /system/ntp/client/get enabled ] != true) do={
$LogPrintExit2 warning $0 ("NTP client is not enabled!") true;
}
:do {
:set Ntp1 [ :resolve ("0." . $NtpPool) ];
:set Ntp2 [ :resolve ("1." . $NtpPool) ];
:set RotateNtpResolveFailed false;
} on-error={
:if ($RotateNtpResolveFailed != true) do={
:set RotateNtpResolveFailed true;
$LogPrintExit2 warning $0 ("Resolving NTP server failed.") true;
} else={
$LogPrintExit2 debug $0 ("Resolving NTP server failed.") true;
}
}
$LogPrintExit2 info $0 ("Updating NTP servers to " . $Ntp1 . " and " . $Ntp2) false;
/system/ntp/client/set servers=($Ntp1, $Ntp2);
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