Network zero can be used with dnsmasq to provide a DHCP server which supports the initial configuration of a device.
Below is an example, minimal, dhcp.conf that can be used
in /etc/dnsmasq.d/dhcp.conf. It shows the configuration
of DHCP option 67 only, other configutation needs to be
adjusted for your own environment.
port=0
# To enable dnsmasq's DHCP server functionality.
dhcp-range=192.168.0.100,168.0.200,255.255.255.0,2h
dhcp-option=option:bootfile-name,"https://[netbox ip/fqdn]/api/plugins/netbox-zero/ztp/"
# Set gateway as Router. Following two lines are identical.
#dhcp-option=option:router,192.168.0.1
dhcp-option=3,192.168.0.1
# Set DNS server as Router.
dhcp-option=6,8.8.8.8
As described the HTTP request sent to the URL specified in the
bootfile option must include one or more HTTP headers identifying the
platform e.g. X-DEVICE-PLATFORM: IOSXE, X-DEVICE-PLATFORM_VERSION: 17.4.1
and on or more header that can be used to idientify the device
in netbpx e.g X-DEVICE-SERIAL: A12345B or X-DEVICE-MAX: 00:12:AA:BB:34:56:78.
These are used in the dispatcher to determine the platform specific view and the platform specfic view to determins the device to prepare the configuration for and the configuration template.