Comment 2 for bug 1578001

These appear to just be informational warnings about DHCP renewals, it sounds like they may be seen with some DHCP configurations, but are not necessarily an indication of an actual problem. Logwatch should probably just filter them.

The debian link (below) has the concise explanation of this warning:

>> What is this 'reuse-lease' all about?
>
> Your DHCP client renews the leased IP although the lease time is not
> expired. Not relevant to this problem.
>
>> Any suggestions, please?
>
> Clear your DHCP lease file on DHCP server. Bounce the thing by doing:
>
> $ systemctl stop isc-dhcp-server
> rm /var/lib/dhcpd/dhcpd.leases
> $ systemctl start isc-dhcp-server
>
> Make sure that the client is disconnected before doing the above.

More info:
https://forums.verizon.com/t5/Fios-Internet/Frequent-disconnects-reuse-lease-25-threshold/td-p/872706
http://isc-dhcp-users.2343191.n4.nabble.com/reuse-lease-lease-age-logs-td3231.html#a3237
http://isc-dhcp-users.2343191.n4.nabble.com/Strange-DHCP-behaviour-td2792.html
https://lists.debian.org/debian-user/2018/10/msg00809.html