Logfile showing vagrant choosing the wrong adapter by choosing it by the ip, instead of only using the name.

vagrant.log

 INFO interface: info: Matching MAC address for NAT networking...
 INFO interface: info: ==> web: Matching MAC address for NAT networking...
==> web: Matching MAC address for NAT networking...
 INFO interface: info: Clearing any previously set network interfaces...
 INFO interface: info: ==> web: Clearing any previously set network interfaces...
==> web: Clearing any previously set network interfaces...
DEBUG network: Available slots for high-level adapters: #<Set: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36}>
 INFO network: Determining network adapters required for high-level configuration...
 INFO network:  -- Slot 2: hostonly
 INFO network: Determining adapters and compiling network configuration...
 INFO network: Network slot 1. Type: nat.
DEBUG network: Normalized configuration: {:auto_config=>false, :adapter=>1}
DEBUG network: Adapter configuration: {:adapter=>1, :type=>:nat}
 INFO network: Network slot 2. Type: hostonly.
DEBUG network: Normalized configuration: {:adapter_ip=>"192.168.50.1", :auto_config=>false, :ip=>"192.168.50.2", :mac=>nil, :name=>"vboxnet5", :netmask=>"255.255.255.0", :nic_type=>nil, :type=>:static, :adapter=>2}
 INFO network: Searching for matching hostonly network: 192.168.50.2
DEBUG network: Adapter configuration: {:adapter=>2, :hostonly=>"vboxnet3", :mac_address=>nil, :nic_type=>nil, :type=>:hostonly}
 INFO network: Enabling adapters...
 INFO interface: output: Preparing network interfaces based on configuration...
 INFO interface: output: ==> web: Preparing network interfaces based on configuration...
==> web: Preparing network interfaces based on configuration...
 INFO interface: info: Matching MAC address for NAT networking...
 INFO interface: info: ==> db: Matching MAC address for NAT networking...
==> db: Matching MAC address for NAT networking...
 INFO interface: info: Clearing any previously set network interfaces...
 INFO interface: info: ==> db: Clearing any previously set network interfaces...
==> db: Clearing any previously set network interfaces...
DEBUG network: Available slots for high-level adapters: #<Set: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36}>
 INFO network: Determining network adapters required for high-level configuration...
 INFO network:  -- Slot 2: hostonly
 INFO network: Determining adapters and compiling network configuration...
 INFO network: Network slot 1. Type: nat.
DEBUG network: Normalized configuration: {:auto_config=>false, :adapter=>1}
DEBUG network: Adapter configuration: {:adapter=>1, :type=>:nat}
 INFO network: Network slot 2. Type: hostonly.
DEBUG network: Normalized configuration: {:adapter_ip=>"192.168.50.1", :auto_config=>false, :ip=>"192.168.50.3", :mac=>nil, :name=>"vboxnet5", :netmask=>"255.255.255.0", :nic_type=>nil, :type=>:static, :adapter=>2}
 INFO network: Searching for matching hostonly network: 192.168.50.3
DEBUG network: Adapter configuration: {:adapter=>2, :hostonly=>"vboxnet3", :mac_address=>nil, :nic_type=>nil, :type=>:hostonly}
 INFO network: Enabling adapters...
 INFO interface: output: Preparing network interfaces based on configuration...
 INFO interface: output: ==> db: Preparing network interfaces based on configuration...
==> db: Preparing network interfaces based on configuration...