We have two DHCP servers at our site (they are each located on different subnets). These DHCP servers are running Windows Server 2012 R2. They are dedicated DHCP servers. Yesterday afternoon, we reconfigured several scopes such that they could become members of the single DHCP Failover Relationship we have configured as Load Balance with 50% of the load placed on each DHCP Failover Relationship member (DHCP Server).
However, this morning, users reported that they were unable to renew their DHCP addresses. Looking into the DHCP logs on both DHCP servers, there are several entries that are as follow:
"36,MM/DD/YYYY,HH:MM:SS,Packet dropped because of Client ID hash mismatch or standby server.,IP subnet,,MAC Address,,0,6,,,,,,,,,0"
I performed a manual synchronization of the Failover relationship and all scopes on both DHCP servers. I also restarted the DHCP service on both DHCP servers but we are still getting the same error.
A Bing/Google search did not bring any light to the issue we are encountering. Has anyone encountered this and if so, what is the solution.
I should add that when I initially attempted to perform an ipconfig/renew on my workstation, it failed and the error listed above showed up in the DHCP log of only one of our DHCP servers but not the other. However, once I performed an ipconfig /release and then an ipconfig /renew, I was able to renew my lease.
I should also add that the DHCP Server event logs on both DHCP servers are clean, there are no warnings and/or errors reported.- Edited by Joseph Tshiteya 14 hours 31 minutes ago