My setup is
Server 1: 2012R2 AD/DHCP/DNS, no option 60, 66, or 67.
Server 2: 2012R2 WDS installed
Server 3: 2008R2 WDS installed
Same subnet for all servers
Boot and install image for both x86 and x64 uploaded
When trying to PXE boot server 4 from the 2008R2 machine it works perfect. When trying to PXE boot from the 2012R2 machine it can't find the boot image (2008R2 is disabled). With Wireshark I can see that the DHCP server offers an IP address (DHCP Info and
DHCP Offer) but no DHCP Requests or DHCP Ack follows that. I get a DHCP Offer from the WDS server shortly after the DHCP Offer from the DHCP server just as I get from the 2008 server. Comparing with the 2008R2 server it looks the same to this point except
for the DHCP Offer from 2012 WDS contains the WDS server name which 2008 DHCP Offer doesn't. Sometimes I can see that the DHCP Offer from WDS comes after 3-4 Info+Offer from DCHP server. No virtual machines involved at all.
I even tried to install another new 2008R2 with WDS and upgraded it to 2012R2. It work fine before upgrade.
Any clues to what is wrong?