I have already failover with 2012R2 and 2016 version.
Sometimes I get problem with it and don't know how it fix.
- win2016 dhcp server stop giving IP to clients. In log only this lines:
32,07/27/20,19:16:58,DNS Update Successful,10.80.0.179,main-61.domain.com,,,0,6,,,,,,,,,0
24,07/27/20,20:00:33,Database Cleanup Begin,,,,,0,6,,,,,,,,,0
25,07/27/20,20:00:33,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
25,07/27/20,20:00:33,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
24,07/27/20,21:00:35,Database Cleanup Begin,,,,,0,6,,,,,,,,,0
25,07/27/20,21:00:35,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
25,07/27/20,21:00:35,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
24,07/27/20,22:00:36,Database Cleanup Begin,,,,,0,6,,,,,,,,,0
25,07/27/20,22:00:36,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
25,07/27/20,22:00:36,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
24,07/27/20,23:00:38,Database Cleanup Begin,,,,,0,6,,,,,,,,,0
25,07/27/20,23:00:38,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
25,07/27/20,23:00:38,0 leases expired and 0 leases deleted,,,,,0,6,,,,,,,,,0
First line in example is "work" state of server. After that server stop giving IP, but dhcp service work, I can manage them through mmc.
- win2012 work fine, but some client can't get IP, if they ask "renew" from win2016 server.
- failover work fine after restart win2016 server (dhcp service restart freeze a long time at this situation. If I have not problem, it restart fine). How to debug this problem, or maybe anybody get this problem.