PXE booting from a different network. Option issues, I think.

Picture this.

WDS Server = Windows, VM, 192.168.1.32 255.255.248.0

DHCP Server 1 = Windows, VM, 192.168.1.15 255.255.248.0, pool for the 192.168.0.0 network only

DHCP Server 2 = Cisco 4510, dhcp pool for a second network: 192.168.16.0 255.255.252.0

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PXE booting on the 192.168.0.0 network is fine. But if I try it on the 192.168.16.0 network, its a no go.

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DHCP server 2 config (I'm running off memory here as I am at home now)

ip dhcp pool new-network network 192.168.16.0 /22 domain-name ourdomain.com dns server 192.168.1.2 192.168.1.3 default-router 192.168.16.1 option 66 ip 192.168.1.32 option 67 ascii path/to/file.efi 

No go. PC PXE boots, gets a dhcp address in the 16 network, and then says TFTP.....

I've tried changinging option 66 to ascii with the fqdm. Quotes, no quotes. Still nothing.

Before I get wireshark on this, is there something I am missing here?