diff --git a/plugins/guests/slackware/cap/configure_networks.rb b/plugins/guests/slackware/cap/configure_networks.rb
index b9b272cde..1d3011a10 100644
--- a/plugins/guests/slackware/cap/configure_networks.rb
+++ b/plugins/guests/slackware/cap/configure_networks.rb
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 require "tempfile"
 
 require_relative "../../../../lib/vagrant/util/template_renderer"
@@ -10,27 +9,42 @@ module VagrantPlugins
         include Vagrant::Util
 
         def self.configure_networks(machine, networks)
-          interfaces = Array.new
-          machine.communicate.sudo("ip -o -0 addr | grep -v LOOPBACK | awk '{print $2}' | sed 's/://'") do |_, result|
+          comm = machine.communicate
+
+          commands   = []
+          interfaces = []
+
+          comm.sudo("ip -o -0 addr | grep -v LOOPBACK | awk '{print $2}' | sed 's/://'") do |_, result|
             interfaces = result.split("\n")
           end
 
-          networks.each do |network|
+          # Remove any previous configuration
+          commands << "sed -i'' -e '/^#VAGRANT-BEGIN/,/^#VAGRANT-END/ d' /etc/rc.d/rc.inet1.conf"
+
+          networks.each.with_index do |network, i|
             network[:device] = interfaces[network[:interface]]
 
-            entry = TemplateRenderer.render("guests/slackware/network_#{network[:type]}", options: network)
+            entry = TemplateRenderer.render("guests/slackware/network_#{network[:type]}",
+              i: i+1,
+              options: network,
+            )
 
+            remote_path = "/tmp/vagrant-network-#{network[:device]}-#{Time.now}-#{i}"
             Tempfile.open("vagrant-slackware-configure-networks") do |f|
               f.binmode
               f.write(entry)
               f.fsync
               f.close
-              machine.communicate.upload(f.path, "/tmp/vagrant_network")
+              comm.upload(f.path, remote_path)
             end
 
-            machine.communicate.sudo("mv /tmp/vagrant_network /etc/rc.d/rc.inet1.conf")
-            machine.communicate.sudo("/etc/rc.d/rc.inet1")
+            commands << "cat '#{remote_path}' >> /etc/rc.d/rc.inet1.conf"
           end
+
+          # Restart networking
+          commands << "/etc/rc.d/rc.inet1"
+
+          comm.sudo(commands.join("\n"))
         end
       end
     end
diff --git a/templates/guests/slackware/network_dhcp.erb b/templates/guests/slackware/network_dhcp.erb
index 53f48f8c0..045496192 100644
--- a/templates/guests/slackware/network_dhcp.erb
+++ b/templates/guests/slackware/network_dhcp.erb
@@ -1,23 +1,11 @@
-IPADDR[0]=""
-NETMASK[0]=""
-USE_DHCP[0]="yes"
-DHCP_HOSTNAME[0]=""
+#VAGRANT-BEGIN
+# Config for eth<%= i %>
+USE_DHCP[<%= i %>]="yes"
+DHCP_HOSTNAME[<%= i %>]=""
 
-IPADDR[1]=""
-NETMASK[1]=""
-USE_DHCP[1]="yes"
-DHCP_HOSTNAME[1]=""
-
-IPADDR[2]=""
-NETMASK[2]=""
-USE_DHCP[2]=""
-DHCP_HOSTNAME[2]=""
-
-IPADDR[3]=""
-NETMASK[3]=""
-USE_DHCP[3]=""
-DHCP_HOSTNAME[3]=""
-
-GATEWAY=""
+<% if options[:gateway] -%>
+GATEWAY="<%= options[:gateway] %>"
+<% end -%>
 
 DEBUG_ETH_UP="no"
+#VAGRANT-END
diff --git a/templates/guests/slackware/network_static.erb b/templates/guests/slackware/network_static.erb
index 0745e8b1a..70ac38378 100644
--- a/templates/guests/slackware/network_static.erb
+++ b/templates/guests/slackware/network_static.erb
@@ -1,25 +1,13 @@
-IPADDR[0]=""
-NETMASK[0]=""
-USE_DHCP[0]="yes"
-DHCP_HOSTNAME[0]=""
+#VAGRANT-BEGIN
+# Config for eth<%= i %>
+IPADDR[<%= i %>]="<%= options[:ip] %>"
+NETMASK[<%= i %>]="<%= options[:ip] %>"
+USE_DHCP[<%= i %>]=""
+DHCP_HOSTNAME[<%= i %>]=""
 
-IPADDR[1]="<%= options[:ip] %>"
-NETMASK[1]=""
-USE_DHCP[1]=""
-DHCP_HOSTNAME[1]=""
-
-IPADDR[2]=""
-NETMASK[2]=""
-USE_DHCP[2]=""
-DHCP_HOSTNAME[2]=""
-
-IPADDR[3]=""
-NETMASK[3]=""
-USE_DHCP[3]=""
-DHCP_HOSTNAME[3]=""
-
-<% if options[:gateway] %>
-  GATEWAY="<%= options[:gateway] %>"
-<% end %>
+<% if options[:gateway] -%>
+GATEWAY="<%= options[:gateway] %>"
+<% end -%>
 
 DEBUG_ETH_UP="no"
+#VAGRANT-END
diff --git a/test/unit/plugins/guests/slackware/cap/configure_networks_test.rb b/test/unit/plugins/guests/slackware/cap/configure_networks_test.rb
new file mode 100644
index 000000000..10cc8493b
--- /dev/null
+++ b/test/unit/plugins/guests/slackware/cap/configure_networks_test.rb
@@ -0,0 +1,48 @@
+require_relative "../../../../base"
+
+describe "VagrantPlugins::GuestSlackware::Cap::ConfigureNetworks" do
+  let(:caps) do
+    VagrantPlugins::GuestSlackware::Plugin
+      .components
+      .guest_capabilities[:slackware]
+  end
+
+  let(:machine) { double("machine") }
+  let(:comm) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(comm)
+    comm.stub_command("ip -o -0 addr | grep -v LOOPBACK | awk '{print $2}' | sed 's/://'",
+      stdout: "eth1\neth2")
+  end
+
+  after do
+    comm.verify_expectations!
+  end
+
+  describe ".configure_networks" do
+    let(:cap) { caps.get(:configure_networks) }
+
+    let(:network_1) do
+      {
+        interface: 0,
+        type: "dhcp",
+      }
+    end
+
+    let(:network_2) do
+      {
+        interface: 1,
+        type: "static",
+        ip: "33.33.33.10",
+        netmask: "255.255.0.0",
+        gateway: "33.33.0.1",
+      }
+    end
+
+    it "creates and starts the networks" do
+      cap.configure_networks(machine, [network_1, network_2])
+      expect(comm.received_commands[1]).to match(/\/etc\/rc.d\/rc.inet1/)
+    end
+  end
+end