When I run with log-dhcp enabled, I notice the following option in dnsmasq's 
DHCP response:

dnsmasq-dhcp: 756190107 sent size:  4 option: 54 server-identifier  172.17.0.2

This is the local IP address of the network interface that dnsmasq is using. 
But dnsmasq is running inside a virtual machine with NAT, and this IP address 
is not the network-facing address.

Is there a way to change the response? I've tried setting 
dhcp-option=option:server-identifier(or 54),... but dnsmasq doesn't accept it. 
I've also tried using 11 which I believe is some kind of server-identifier 
override. That also did not work.

I'm using dnsmasq to do DHCP proxying for PXE.

Thanks,
Ryan
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