How to sync a Linux secondary DHCP server?

[Sten Carlsen]

Thanks, I did not know and I thought this should be part of the answer.

On 31/07/2018 16.44, Thomas Markwalder wrote:
> Hello Sten:
>
> Those would also have to be manually sync'd. The fail over protocol
> does not extend to reservations. 
>
> Regards,
>
> Thomas
>
> On 07/31/2018 10:21 AM, Sten Carlsen wrote:
>> Just to clarify, "host reservations" can be two things.
>>
>> Host statement, possibly with a fixed address statement -
>> synchronized via file transfer.
>>
>> Reservation in the leases file - how would these function in a fail
>> over pair?
>>
>>
>> On 31/07/2018 16.16, Thomas Markwalder wrote:
>>> Hello Sandra:
>>>
>>> Yes. Anything specified via configuration file must be sync'd
>>> outside of ISC DHCP.
>>> Fail over, in ISC DHCP, is based on draft RFC:
>>>
>>> https://tools.ietf.org/html/draft-ietf-dhc-failover-12
>>>
>>> It does not call for exchanging information beyond lease and server
>>> state information, and
>>> was written such that any two servers which adhere to it, should be
>>> inter operable.  At least
>>> that was the original intent.
>>>
>>> Host reservations are "a policy mechanism" and as such are not
>>> governed by RFCs. Thus they
>>> are entirely specific to DHCP server implementations.
>>>
>>> Regards,
>>>
>>> Thomas Markwalder
>>> ISC Software Engineering
>>>
>>> On 07/31/2018 10:00 AM, Sandra Schlichting wrote:
>>>>> One point of clarification,  Host reservations are not synchronized
>>>>> between servers via fail over.  Any host reservations you have in one
>>>>> configuration file,  you must include in the peer server's
>>>>> configuration
>>>>> file.  For dynamic reservations (i.e. those that do not include a
>>>>> fixed
>>>>> address), the leases allocated for each host will be synchronized
>>>>> (assuming they come from within a FO pool), but not the actual
>>>>> reservation specifications.
>>>> So for the reservation I would have to rsync/scp them over?
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>>
>>
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>
>
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