I just want to make sure everyone knows that the TechNet blog post Matthew Topper linked to says that reservations are NOT synchronized automatically. I have read the same information in other locations and experienced it myself with my Server 2012 R2 DHCP servers. The blog post says that you can do it manually with DHCP MMC or PowerShell or install a tool that runs the PowerShell command for you.
I solved the problem for my company by having a short PowerShell script run as a scheduled task once a day to keep the standby DHCP server updated with all the reservations. The following line is the only important line from the script: Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force - Stephen From: [email protected] [mailto:[email protected]] On Behalf Of Hank Arnold Sent: Monday, June 08, 2015 5:02 AM To: [email protected] Subject: RE: [NTSysADM] 2012 DHCP failover This is very cool to know. Thanks. Regards, Hank Arnold Microsoft MVP - Consumer Security My Blog: http://it.toolbox.com/blogs/personal-pc-assistant/ Twitter: @Hank_PCDoc Facebook: https://www.facebook.com/hank.arnold.96 From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Andrew S. Baker Sent: Tuesday, June 2, 2015 6:33 PM To: ntsysadm Subject: Re: [NTSysADM] 2012 DHCP failover I've tested it. It does, in fact, failover fully. ASB http://XeeMe.com/AndrewBaker<http://xeeme.com/AndrewBaker> Providing Virtual CIO Services (IT Operations & Information Security) for the SMB market... On Tue, Jun 2, 2015 at 6:26 PM, Matthew Topper <[email protected]<mailto:[email protected]>> wrote: This blog post seems to indicate that it is. I've not tested it though http://blogs.technet.com/b/teamdhcp/archive/2012/11/27/automatic-syncing-of-scope-configuration-changes-between-2-dhcp-failover-servers.aspx Sent from my Verizon Wireless 4G LTE DROID Ed Ziots <[email protected]<mailto:[email protected]>> wrote: I dont think.so I have not known microsoft dhcp to be trully highly available. This might have changed in 2012. Ed On Jun 2, 2015 5:49 PM, "Dave Lum" <[email protected]<mailto:[email protected]>> wrote: Scenario: Two 2012 R2 servers in hot-standby failover mode. If DHCP01 has DHCP reservations, do they ever move over DHCP02 if the failover happens? Dave Attention: Information contained in this message and or attachments is intended only for the recipient(s) named above and may contain confidential and or privileged material that is protected under State or Federal law. If you are not the intended recipient, any disclosure, copying, distribution or action taken on it is prohibited. If you believe you have received this email in error, please contact the sender, delete this email and destroy all copies.
