How to sync a Linux secondary DHCP server?

[Thomas Markwalder]

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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