Merge pull request #6538 from mitchellh/sethvargo/pr-6325

Make DHCP IP configurable

plugins/providers/virtualbox/action/network.rb

@@ -249,14 +249,15 @@ module VagrantPlugins
             auto_config: true,
             mac:         nil,
             nic_type:    nil,
-            type:        :static
+            type:        :static,
+            dhcp_ip:     "172.28.128.1",
           }.merge(options)
 
           # Make sure the type is a symbol
           options[:type] = options[:type].to_sym
 
           # Default IP is in the 20-bit private network block for DHCP based networks
-          options[:ip] = "172.28.128.1" if options[:type] == :dhcp && !options[:ip]
+          options[:ip] ||= options[:dhcp_ip] if options[:type] == :dhcp
 
           ip = IPAddr.new(options[:ip])
           if ip.ipv4?

website/docs/source/v2/networking/private_network.html.md

@@ -43,6 +43,14 @@ The IP address can be determined by using `vagrant ssh` to SSH into the
 machine and using the appropriate command line tool to find the IP,
 such as `ifconfig`.
 
+You can also specify the DHCP IP:
+
+```ruby
+Vagrant.configure("2") do |config|
+  config.vm.network "private_network", type: "dhcp", dhcp_ip: "192.168.0.100"
+end
+```
+
 ## Static IP
 
 You can also specify a static IP address for the machine. This lets you