I noticed that our comnpanies NTP server was having issues. Then I started to see issues on my home NTP server but only over IPv4. Over IPv6 both NTP servers at home are doing just fine.
You can see this on pool.ntp.org: Statistics for 220.127.116.11 and pool.ntp.org: Me Organized?'s pool servers
Could this be an issue with the monitoring server?
Has anyone else noticed similar issues?