New on RIPE Labs: Reviewing the 2016 Leap Second
Dear colleagues, Last month we covered the 2015 leap second ahead of the insertion of a leap second at the very end of 2016. As stated previously, leap seconds can trigger poorly-tested code paths; leap second handling always unearths bugs and issues. This one was no exception! Please find more details on RIPE Labs: https://labs.ripe.net/Members/stephen_strowes/reviewing-the-2016-leap-second Kind regards, Mirjam Kuehne RIPE NCC
Hi, On Mon, Jan 16, 2017 at 10:11:22AM +0100, Mirjam Kuehne wrote:
https://labs.ripe.net/Members/stephen_strowes/reviewing-the-2016-leap-second
I find the statement "While many of our RIPE Atlas anchors are configured to skew time back towards UTC when a change is detected (as above), some of the older anchors are configured to observe the leap indicator in NTP responses and respond to it by stepping system clocks backwards" quite interesting. Do not all anchors run the same software? If not, why not? Gert Doering -- NetMaster -- have you enabled IPv6 on something today...? SpaceNet AG Vorstand: Sebastian v. Bomhard Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann D-80807 Muenchen HRB: 136055 (AG Muenchen) Tel: +49 (0)89/32356-444 USt-IdNr.: DE813185279
On 16 Jan 2017, at 19:23, Gert Doering <gert@space.net> wrote:
On Mon, Jan 16, 2017 at 10:11:22AM +0100, Mirjam Kuehne wrote:
https://labs.ripe.net/Members/stephen_strowes/reviewing-the-2016-leap-second
I find the statement
"While many of our RIPE Atlas anchors are configured to skew time back towards UTC when a change is detected (as above), some of the older anchors are configured to observe the leap indicator in NTP responses and respond to it by stepping system clocks backwards"
quite interesting.
Do not all anchors run the same software? If not, why not?
The NTP daemons on the v1 and the v2 anchors are configured differently. The difference wasn’t intentional, but it did provide us with an interesting comparison! S.
participants (3)
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Gert Doering -
Mirjam Kuehne -
Stephen Strowes