HOTSPOT
Your network contains two DHCP servers named Server1 and Server2. Server1 fails.
You discover that DHCP clients can no longer receive IP address leases.
You need to ensure that the DHCP clients receive IP addresses immediately.
What should you configure from the View/Edit Failover Relationship settings? To answer, select the
appropriate setting in the answer area.
Answer: 
Explanation:
<map><m x1=”44″ x2=”469″ y1=”88″ y2=”152″ ss=”0″ a=”0″ /></map>A manual failover will have to occur by clicking on the Change to partner down button (the partner
has to actually be unavailable to click this button).
Note: You can manually change the state of a server which is running in communication interrupted
to partner down using DHCP MMC or DHCP PowerShell.
In MMC, go to IPv4->Properties, go to Failover tab, select the specific failover relationship and click
edit. You will see “Change to partner down” button on the edit page. This button is enabled when
the server is running in communication interrupted state. DHCP Failover Hot-Standby Mode
http://blogs.technet.com/b/teamdhcp/archive/2012/09/03/dhcp-failover-hot-standby-mode.aspx
ok i guessed the supposed solution right…
but what I don’t get: “State of this server” is “lost contact to partner”, so when I push the “Change to partner down” button, how will the partner server be able to notice and take over??
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I think this is on server2 and by clicking change to partner down, you make the current node take over the dhcp service entirely, instead of relying to only the 5% reserved addresses.
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Right and wrong Hippo
Yes this is from Server 2.
A server is active or standby in the context of a failover relationship. For instance, a server that has the role of active for a given relationship could be a standby server for another relationship. By default, the server that is used to create the failover relationship is the active server, but this is not required.
When you choose hot standby, you must also configure the percentage of IP addresses on the active server that are reserved for use on the standby server in the event that the active server does not respond. By default, this reserve percentage is 5%.
The reserve percentage is used for new DHCP leases. If a DHCP client attempts to renew a DHCP lease with the standby server that is unable to contact the active server (COMMUNICATIONS INTERRUPTED or PARTNER DOWN state exists), the same IP address that was previously assigned to the DHCP client will be renewed. In this situation, a temporary lease is granted for the maximum client lead time (MCLT) duration, not the full scope lease time.
In a COMMUNICATIONS INTERRUPTED or PARTNER DOWN state, if the standby server issues all its available reserve percentage leases to new DHCP clients before the MCLT expires, it will refuse to issue new DHCP leases, but it will continue to renew existing leases. After the MCLT has expired, the standby server will be permitted to use the entire available IP address pool for new DHCP leases, provided the server is in PARTNER DOWN state. If the server is still in COMMUNICATIONS INTERRUPTED state, it will not use the entire available IP address pool for new DHCP leases.
https://technet.microsoft.com/en-us/library/dn338976(v=ws.11).aspx#hot_standby
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On Slide present “State of partner server:” Not available
First change of this state
Next Load Balance Mode.
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