Maximum Time difference between DHCP primary and DHCP failover Server

glenn.satchell at glenn.satchell at
Mon Jan 18 23:47:50 UTC 2021

On 2021-01-19 05:41, Simon Hobson wrote:
> Kraishak Mahtha < at> wrote:
>> What would be the maximum time difference that can be between a ISC  
>> DHCP primary and failover server
> AIUI, not a huge amount.
> But I have to wonder at the question - do you have a problem with
> timekeeping ? NTP will typically keep clocks accurate to millisecond
> accuracy which is a few orders of magnitude better than is needed for
> failover.
> Simon

Even if you are on an isolated network with no external access you could 
set the two dhcp servers as NTP peers so they were synchronised to each 


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