We have ZCM 11.2 running as a virtual appliance on an ESXi 5 host. Until this weekend PXE boot and imaging ran fine.

The two DHCP servers had general OES2 sp3 / SLES 10 sp4 updates run on them on Saturday (6/30) and are running version 3.0.7-7.15.1. No changes were made to the ZCM appliance.

Several notebook computers will now hang on the PXE boot and go nowhere. Other devices when PXE boot is attempted give the "E53: No boot filename received" error.

DHCP is running as is proxy DHCP. What am I missing? Did the updated DHCP server stop working as the previous one?