DHCP server not working for iPXE

[excessive]

The switch is BlackDiamond X8.
I’ve set dhcp server for our lab VLAN that I’m using for testing. The pool range and everything else works as intended.
I’ve configured options 66 and 67 to FOG server machine and that’s where it breaks. I’m getting:

Filename: undionly.kpxe
Could not start download: Operation not supported (http://ipxe.org/3c092003)

I can confirm that when using separate isc-dhcp server there’s no problem. But I’d like to utilize our switch.

Here’s snippet of my configuration:

VLAN "XXX_TEST":
    DHCP Address Range   : 192.168.xx.xx->192.168.xx.xx
    Netlogin Lease Timer : Not configured (Default = 10 seconds)
    DHCP Lease Timer     : 86400 seconds
    Default Gateway      : 192.168.xx.xx
    Primary DNS Server   : xx.xx.xx.xx
    DHCP Option Code  66 : ipaddress 192.168.xx.xx
    DHCP Option Code  67 : string "undionly.kpxe"
    Ports DHCP Enabled   : 1:21

[StephanH]

Wireshark is not difficult here. Just enter "bootp" in the displayfilter line. Then you will only see the DHCP messages. The DHCP options are displayed in plain text.

[excessive]

Thanks for the advice! Guess I’ll have to level up my wireshark skills.

[StephanH]

The easiest way to narrow down this is to do a wiresharktrace on you client (or on an mirror port on the swicht) to gather the DHCP-Messages. If you see the messages you can check if the values in the options are correct. If you can do the same while using you ISC you can compare the dhcp messages in both situations (= DHCP on ISC and DHCP on XOS).

I can’t see an error in your dhcp config directly. Therefore I assume something in the options is different.

[excessive]

Greetings, Stephan.
Yes, this is from my DHCP client (a workstation). It receives IP from the allocated pool then I get the quoted message. 

[StephanH]

Hello,

do I understand correctly that the message:

Filename: undionly.kpxe

Could not start download: Operation not supported (http://ipxe.org/3c092003

is from you DHCP client?