OK, to start off, here's the environment:
Windows Server 2008 R2 DNS/DHCP server with DDNS updating from the DHCP server service
ESXi Host: ESXi 5.0 on a Dell PE1950
VMs: 2X CentOS 6.2, one network connection on each
Here's the problem:
For some odd reason, when these VMs come up, they request a total of 3 DHCP leases, one with the MAC address and no name, so DDNS is not updated, one with a weird 8 hex digit unique identifier that is definitely not the MAC address, and one more with that same identifier and some extra digits that seem random. The second and third requests both include the system name so DDNS updates with those, at the same time. The machine actually uses the first one. The DNS server then presents the wrong IP address when trying to reach it from outside the lab.
I don't know if it is a difference between Linux and Windows interpreting the DHCP standards, but this doesn't happen with any of our CentOS5/ RHEL5 VMs, or even our Ubuntu or SLES VMs. Those work great and update DDNS just fine. OF course, all the Windows VMs work fine.
Does anyone have a clue what's going on?
Windows Server 2008 R2 DNS/DHCP server with DDNS updating from the DHCP server service
ESXi Host: ESXi 5.0 on a Dell PE1950
VMs: 2X CentOS 6.2, one network connection on each
Here's the problem:
For some odd reason, when these VMs come up, they request a total of 3 DHCP leases, one with the MAC address and no name, so DDNS is not updated, one with a weird 8 hex digit unique identifier that is definitely not the MAC address, and one more with that same identifier and some extra digits that seem random. The second and third requests both include the system name so DDNS updates with those, at the same time. The machine actually uses the first one. The DNS server then presents the wrong IP address when trying to reach it from outside the lab.
I don't know if it is a difference between Linux and Windows interpreting the DHCP standards, but this doesn't happen with any of our CentOS5/ RHEL5 VMs, or even our Ubuntu or SLES VMs. Those work great and update DDNS just fine. OF course, all the Windows VMs work fine.
Does anyone have a clue what's going on?