Error PXE E-54 when booting to PXE.
This can be applied to DHCP on a Cisco router.
You have to change option value 67 STRING BStrap\X86pc\BStrap.0 to be bootfile option. Cisco products don't have an option 67.
Cisco hybrid mode doesn't allow for option 43 (vendor specific options) where Cisco native mode does. All the other options are exactly the same.
For more information on PXE forced mode utility, see article 28035.
Here is an example DHCP scope with PXE forced mode in hybrid mode:
ip dhcp pool 11
network 10.x.x.x 255.255.255.0
dns-server 10.x.x.245 10.x.x.x
netbios-name-server 10.x.x.x 10.x.x.x
option 60 ascii "PXEClient"
option 66 ascii "10.x.x.1"
NOTE: In some instances with Cisco IOS operating in Hybrid mode, enabling option 60 resulted in ProxyDHCP errors and needed to be removed.
Cisco router in hybrid mode for IOS.