1.Check the secure channel bronker or not If its broken reset with below cmd.nltest /server: servername /sc_reset: pugazh.in 2. Unauthorize and do authorization for DHCP server.

If DHCP client have got IP from DHCP server and it has time left before lease expire, if If client restarts and the server is unavailable what happen in this scenario? If client is not reachable DHCP server at time of startup, it tries to ping default gateway that was assigned previously. If default gateway responds that client assumes that it is still in same network and hence keeps on using IP address (Remember lease time is still left). If client can’t get response from gateway, it will consider itself to be out of network and hence will auto configure (put APIPA address) itself. Meanwhile, client will keep on searching…

DHCP console icons added for Windows Server 2012 Click the link Icon Description   Failover is configured on the DHCP server   DHCP scope  policies   DHCP scope policies: Deactivated   DHCP scope policy option   DHCP server policies   DHCP server policies: Deactivated   DHCP server policy option   DHCP server/scope policy   DHCP server/scope policy: Query busy (shown while the server is being queried)   DHCP server/scope policy: Offline (cannot connect to the server)   DHCP server/scope policy: Deactivated   DHCP server/scope policy: Offline and deactivated