combining lease files

Sten Carlsen stenc at
Wed Aug 29 13:33:40 UTC 2018

On 29/08/2018 14.28, project722 wrote:
> Hey All,
> We are consolidating all subnets on server B and moving to an exisitng
> failover pair we have, In order to decom server B. I'll need to take
> the leases file from server B and combine whats there with the leases
> file on both servers in the failover pair. (doing this to make the
> failover pair aware of what leases are already out there that were
> assigned by server B)
I am not sure, but I think one other way could be to make server B part
of a failover pair with one of the existing failover servers for a
period of time. That way the remaining server will have all the
information transferred from server B. Later that configuration could be
changed to have the other remaining failover server act as the peer,
that way the servers would transfer the data, probably with less risk.

Others should confirm or reject this idea.
> I'm thinking just a simple cat on both files should be fine to combine
> the data. And, all 3 servers are running the same verison of dhcp
> ( and RHEL so I don't expect and formatting problems.
> However, since failover pairs have more transitional states with the
> "binding state" variable, is it possible I will run into any issues
> doing this? Is there a better, more preferred way of doing this
> instead of merging the leases file?
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