ESXi host does not synchronize with NTP - causes HA config failures?

Hello

We are currently implementing some Cisco UCS systems. We using blades Cisco UCS B200 M1 (x 5670, 48 GB of RAM)

Everything seems to work fine except these little things, which seems to be related.

1 NTP synchronization is not happenning, or happening very slowly.

2. a 10 cluster host, when it is configured for HA, has many guests who fail to be configured for HA (for example we had only 2 guests get properly configured for HA out of 10).

Initially, I thought REP 1 and 2 were not related, but then I remember reading somewhere that the ESXi host must have simultaneously for HA to work.

On question No. 1:

10 guests have a difference of 5-6 minutes between them. Curiously, the first hosts that are connected to a HA cluster, if their duration is similar, they wil work.

But others are more than 1 to 2 minutes off, they will fail. Our NTP is configured on 2 internal NTP servers, which syncs with the outside world - the 2

NTP servers are:

The default gateway of each ESXi

The network Core switch

We know that the NTP servers work correctly because our advertising is synchronized with them and we checked on our domain controller local time main external time source.

Debug information

Output of /etc/ntp.conf

~ # cat /etc/ntp.conf
restrict default kod nomodify notrap nopeer
restrict the 127.0.0.1
Server 10.*
Server 10.*
driftfile /etc/ntp.drift

Everything has been configured through the GUI, I show the output of ntp.conf for confirmation.

We tried to restart the hosts (without success).

Everyone knows what we can do to solve this?

Thank you

Ionut

You tried to restart NTP.

Tags: VMware

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