Satellite Capsule uses ISC DHCP for DHCP management. The configuration files in
/etc/dhcp/ should not be modified manually but only via the Satellite API. When a manual change is performed, there can be an error
HTTP 400 Unable to add Subnet when Capsule DHCP parser (smart-proxy or foreman-proxy) is unable to read the configuration.
Red Hat Satellite 6.1 or higher
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