diff --git a/manifests/inspector.pp b/manifests/inspector.pp
index 5f041b06..1754dcaf 100644
--- a/manifests/inspector.pp
+++ b/manifests/inspector.pp
@@ -115,6 +115,20 @@
 #   (optional) IP range to use for nodes being introspected
 #   Defaults to '192.168.0.100,192.168.0.120'
 #
+# [*dnsmasq_ip_subnets*]
+#    (optional) List of hashes with keys: 'tag', 'ip_range', 'netmask', and
+#     'gateway'. Assigning additional subnets allow dnsmasq to serve dhcp
+#     request that came in via dhcp relay/helper.
+#    [ { tag      => 'subnet1',
+#        ip_range => '192.168.0.100,192.168.0.200',
+#        netmask  => '255.255.255.0',
+#        gateway  => '192.168.0.254' },
+#      { tag      => 'subnet2',
+#        ip_range => '192.168.1.100,192.168.1.200',
+#        netmask  => '255.255.255.0',
+#        gateway  => '192.168.1.254' } ]
+#    Defaults to undef
+#
 # [*dnsmasq_local_ip*]
 #   (optional) IP interface for the dnsmasq process
 #   Defaults to '192.168.0.1'
@@ -202,6 +216,7 @@ class ironic::inspector (
   $swift_tenant_name               = 'services',
   $swift_auth_url                  = 'http://127.0.0.1:5000/v2.0',
   $dnsmasq_ip_range                = '192.168.0.100,192.168.0.120',
+  $dnsmasq_ip_subnets               = undef,
   $dnsmasq_local_ip                = '192.168.0.1',
   $sync_db                         = true,
   $ramdisk_collectors              = 'default',
diff --git a/releasenotes/notes/routed-networks-ironic-inspector-7ccc2087fc83c052.yaml b/releasenotes/notes/routed-networks-ironic-inspector-7ccc2087fc83c052.yaml
new file mode 100644
index 00000000..9578faca
--- /dev/null
+++ b/releasenotes/notes/routed-networks-ironic-inspector-7ccc2087fc83c052.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - Assigning additional subnets allow dnsmasq to serve dhcp request that came
+    in via dhcp relay/helper.
+    Adds parameter 'dnsmasq_ip_subnets' and enable configuration of dhcp-range
+    and dhcp-option 'option:router' for additional subnets in dnsmasq.
diff --git a/spec/classes/ironic_inspector_spec.rb b/spec/classes/ironic_inspector_spec.rb
index f03fd414..fccb47d9 100644
--- a/spec/classes/ironic_inspector_spec.rb
+++ b/spec/classes/ironic_inspector_spec.rb
@@ -46,6 +46,7 @@ describe 'ironic::inspector' do
       :swift_tenant_name               => 'services',
       :swift_auth_url                  => 'http://127.0.0.1:5000/v2.0',
       :dnsmasq_ip_range                => '192.168.0.100,192.168.0.120',
+      :dnsmasq_ip_subnets              => false,
       :dnsmasq_local_ip                => '192.168.0.1',
       :ipxe_timeout                    => 0,
       :http_port                       => 8088,
@@ -159,6 +160,14 @@ describe 'ironic::inspector' do
           :detect_boot_mode            => true,
           :node_not_found_hook         => 'enroll',
           :discovery_default_driver    => 'pxe_ipmitool',
+          :dnsmasq_ip_subnets          => [ { 'tag'      => 'subnet1',
+                                              'ip_range' => '192.168.1.100,192.168.1.200',
+                                              'netmask'  => '255.255.255.0',
+                                              'gateway'  => '192.168.1.254' },
+                                            { 'tag'      => 'subnet2',
+                                              'ip_range' => '192.168.2.100,192.168.2.200',
+                                              'netmask'  => '255.255.255.0',
+                                              'gateway'  => '192.168.2.254' } ],
         )
       end
       it 'should replace default parameter with new value' do
@@ -183,6 +192,18 @@ describe 'ironic::inspector' do
         is_expected.to contain_file('/etc/ironic-inspector/dnsmasq.conf').with_content(
             /dhcp-boot=tag:ipxe,http:\/\/192.168.0.1:3816\/inspector.ipxe/
         )
+        is_expected.to contain_file('/etc/ironic-inspector/dnsmasq.conf').with_content(
+           /dhcp-range=set:subnet1,192.168.1.100,192.168.1.200,255.255.255.0,29/
+        )
+        is_expected.to contain_file('/etc/ironic-inspector/dnsmasq.conf').with_content(
+           /dhcp-option=tag:subnet1,option:router,192.168.1.254/
+        )
+        is_expected.to contain_file('/etc/ironic-inspector/dnsmasq.conf').with_content(
+           /dhcp-range=set:subnet2,192.168.2.100,192.168.2.200,255.255.255.0,29/
+        )
+        is_expected.to contain_file('/etc/ironic-inspector/dnsmasq.conf').with_content(
+           /dhcp-option=tag:subnet2,option:router,192.168.2.254/
+        )
       end
       it 'should contain file /var/www/httpboot/inspector.ipxe' do
         is_expected.to contain_file('/var/www/httpboot/inspector.ipxe').with(
diff --git a/templates/inspector_dnsmasq_http.erb b/templates/inspector_dnsmasq_http.erb
index e26101b5..54102620 100644
--- a/templates/inspector_dnsmasq_http.erb
+++ b/templates/inspector_dnsmasq_http.erb
@@ -1,6 +1,12 @@
 port=0
 interface=<%= @dnsmasq_interface %>
 bind-interfaces
+<% if @dnsmasq_ip_subnets.is_a?(Array) -%>
+<% @dnsmasq_ip_subnets.each do |s| -%>
+dhcp-range=set:<%= s['tag'] -%>,<%= s['ip_range'] -%>,<%= s['netmask'] -%>,29
+dhcp-option=tag:<%= s['tag'] -%>,option:router,<%= s['gateway'] %>
+<% end -%>
+<% end -%>
 dhcp-range=<%= @dnsmasq_ip_range %>,29
 dhcp-sequential-ip
 dhcp-match=ipxe,175
diff --git a/templates/inspector_dnsmasq_tftp.erb b/templates/inspector_dnsmasq_tftp.erb
index 0b1f24af..981bb6b7 100644
--- a/templates/inspector_dnsmasq_tftp.erb
+++ b/templates/inspector_dnsmasq_tftp.erb
@@ -1,6 +1,12 @@
 port=0
 interface=<%= @dnsmasq_interface %>
 bind-interfaces
+<% if @dnsmasq_ip_subnets.is_a?(Array) -%>
+<% @dnsmasq_ip_subnets.each do |s| -%>
+dhcp-range=set:<%= s['tag'] -%>,<%= s['ip_range'] -%>,<%= s['netmask'] -%>,29
+dhcp-option=tag:<%= s['tag'] -%>,option:router,<%= s['gateway'] %>
+<% end -%>
+<% end -%>
 dhcp-range=<%= @dnsmasq_ip_range %>,29
 dhcp-boot=pxelinux.0,localhost.localdomain,<%= @dnsmasq_local_ip %>
 dhcp-sequential-ip