How to sync a Linux secondary DHCP server?
Thomas Markwalder
tmark at isc.org
Tue Jul 31 14:44:21 UTC 2018
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?
>>> _______________________________________________
>>> dhcp-users mailing list
>>> dhcp-users at lists.isc.org
>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20180731/8e252799/attachment-0001.html>
More information about the dhcp-users
mailing list