| [chrony-users] Poor synchronization to local NTP server |
[ Thread Index |
Date Index
| More chrony.tuxfamily.org/chrony-users Archives
]
- To: "chrony-users@xxxxxxxxxxxxxxxxxxxx" <chrony-users@xxxxxxxxxxxxxxxxxxxx>
- Subject: [chrony-users] Poor synchronization to local NTP server
- From: Ryan Govostes <rgovostes@xxxxxxxx>
- Date: Tue, 16 Mar 2021 19:10:11 +0000
- Accept-language: en-US
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=whoi.edu; dmarc=pass action=none header.from=whoi.edu; dkim=pass header.d=whoi.edu; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pPgIVnkxHyWnDcgMJfZ0M+0G9/Xmma7vtteVJAhnOBA=; b=KQ5TFWHGw/kAC3ZQ/n/VnQ62UXsiSCz5Hbq5ai8939wOHjuA57vF+biw89DxB2rnSfZLvmYPo3PeQuVylHRzo5hZIqjHiv621vj4FxPWmEuGCaskj9RAtFG6xjofjvLxCqEV37vilzz5rTeVjFSwrlCZMcX8cTnbQUsZtArdBba6Ucu0Fb3PBqdAA3yBSH2ZrRwXESMH17++cv+BE3hMif5HVBQGjt3bFBXFGjpumP/dVPIwfW3eKQjm6AZS9lc/eZlp0ylsnFqFeiUuh/8rlFrI6rBEvF2HL3vHSamt4JQPYYavLS80fKRkkE/itlAHe4AD/g0sm1y3eF5BDlylSQ==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=lSteveAhGsRbffpDvjr9/VewdOhGc6v4RfSuTQlIn3vCA1LNcik1uaNN1bfHoAjuDb0qzy76Tc4NvpZT1sRWtFHEQ084VsyMS9dOZqKP/yK5PisOu4slhxWwu8xLUdQr/QUt1oHfRl6QI9nvO6gG29SCqZQV1Jgj0AAql6HwaDVW0v2DfOjrOVaouHpUKUXtFjvgcaxtOOv9/AyrfY5nqIROjRH5AYbvYWRovIPHZrK9qAbOvYuR05/4ycC8otxUZLjRczaes2K1PcvrEUINtkQRSEJutl4+mRGBcHxX+FUu3xxfVKcdMEmIoBvykdAXeWMAFc9+hj3frrIyo+ZAjg==
- Authentication-results: chrony.tuxfamily.org; dkim=none (message not signed) header.d=none;chrony.tuxfamily.org; dmarc=none action=none header.from=whoi.edu;
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=whoi.onmicrosoft.com; s=selector2-whoi-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pPgIVnkxHyWnDcgMJfZ0M+0G9/Xmma7vtteVJAhnOBA=; b=bdDSHeFb8MqzbffTIRWh8CI0M9tXBKK4KuRLWjlMiGxdqb8/mbIz0pg2Q6xIQbu5L3ZuD+VVFY77ev9CQzhQw16ZWaxsXfZaoY9DlZxqB/6GyJynNyxW6p2mm9RiL5MHC7UUYkXYDAxtU+XaBXy9bFKV6i/9Cnf+tMcIYd4FlUE=
- Thread-index: AQHXGpf8rKtCpyDqE0WdBmq3k2kliQ==
- Thread-topic: Poor synchronization to local NTP server
I am running ntpd on a local server. That server syncs its clock to pool.ntp.org.
Now I want another device, running chrony, to sync its clock to the local server, so I configured chrony with `server asdfasdfa iburst`. For comparison I also added `server time.nist.gov iburst`.
I’m not sure I’m interpreting the output of chronyc correctly but it seems that it is getting a much better fix to the remote NIST server than to the local server which is on the same subnet and responds to ping in < 0.5 ms.
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^- asdfasdfa 4 6 7 2 +39ms[ -669us] +/- 109ms
^* time-d-b.nist.gov 1 6 7 2 -16us[ -40ms] +/- 27ms
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
asdfasdfa 8 4 265 -1.772 4.203 +39ms 191us
time-d-b.nist.gov 8 6 265 -2.494 9.770 -61us 442us
What could I start looking into to diagnose the issue? Is it likely to be chrony or the ntp server at fault?
Thanks,
Ryan