[ntp:questions] ntp client does not sync with server after nic down and up
michael.cook at sfr.fr
Tue Jun 6 09:34:42 UTC 2017
> Le 5 juin 2017 à 11:06, 稻草人/nl <1227870243 at qq.com> a écrit :
> i have a ntp server and client on suse with v 4.2.8p10. both server and client have two ip in the same subnet, and client use this 2 ip sync with server，after long time test(8hours for ifconfig down and then up 2 nics), i found client cannot sync with server(saw a large value of "when" by ntqp command), and restart ntp will solve this, some time i found it will recover automatically in few hours.
> i found i can ping each other but no packet on port123 between and server when problem occures.
> flash code is 1200 for two assid
> any ideas?
First thing to do is check the existing logs, system messages, ntp log, daemon logs if available ; there should be a clue there.
As this is a test, the problem should be reproducible. So before repeating it make sure that ntp logging is enabled, that ntp reconfig ad system nic reconfig messages are capture , and maybe run ntpd in debug mode , i.e. not demonized. Just standard debugging methodology really.
> by the way, is there a document explaining how client connect to server when starting ntp and when and how client will reconnect to server after interface changed?
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