diff --git a/REFERENCE.md b/REFERENCE.md
index e65d56f..b46ef97 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -128,6 +128,7 @@ The following parameters are available in the `ipmi::network` defined type:
 * [`gateway`](#-ipmi--network--gateway)
 * [`type`](#-ipmi--network--type)
 * [`lan_channel`](#-ipmi--network--lan_channel)
+* [`interface_type`](#-ipmi--network--interface_type)
 
 ##### <a name="-ipmi--network--ip"></a>`ip`
 
@@ -170,6 +171,17 @@ Defaults to the first detected lan channel, starting at 1 ending at 11
 
 Default value: `undef`
 
+##### <a name="-ipmi--network--interface_type"></a>`interface_type`
+
+Data type: `Optional[Enum['dedicated', 'shared', 'failover']]`
+
+Controls the NIC selection mode for the BMC.
+Supported values: 'dedicated', 'shared', 'failover'.
+Only applied when the manufacturer is known (Supermicro or Dell).
+Leave undef to skip interface type configuration.
+
+Default value: `undef`
+
 ### <a name="ipmi--snmp"></a>`ipmi::snmp`
 
 Manage SNMP community strings
diff --git a/manifests/network.pp b/manifests/network.pp
index 32338e9..0057389 100644
--- a/manifests/network.pp
+++ b/manifests/network.pp
@@ -11,18 +11,24 @@
 # @param lan_channel
 #   Controls the lan channel of the IPMI network to be configured.
 #   Defaults to the first detected lan channel, starting at 1 ending at 11
+# @param interface_type
+#   Controls the NIC selection mode for the BMC.
+#   Supported values: 'dedicated', 'shared', 'failover'.
+#   Only applied when the manufacturer is known (Supermicro or Dell).
+#   Leave undef to skip interface type configuration.
 #
 define ipmi::network (
-  Stdlib::IP::Address $ip        = '0.0.0.0',
-  Stdlib::IP::Address $netmask   = '255.255.255.0',
-  Stdlib::IP::Address $gateway   = '0.0.0.0',
-  Enum['dhcp', 'static'] $type   = 'dhcp',
-  Optional[Integer] $lan_channel = undef
+  Stdlib::IP::Address                          $ip             = '0.0.0.0',
+  Stdlib::IP::Address                          $netmask        = '255.255.255.0',
+  Stdlib::IP::Address                          $gateway        = '0.0.0.0',
+  Enum['dhcp', 'static']                       $type           = 'dhcp',
+  Optional[Integer]                            $lan_channel    = undef,
+  Optional[Enum['dedicated', 'shared', 'failover']] $interface_type = undef,
 ) {
   require ipmi::install
 
   $_real_lan_channel = $lan_channel ? {
-    undef => $ipmi::default_channel,
+    undef   => $ipmi::default_channel,
     default => $lan_channel,
   }
 
@@ -62,4 +68,52 @@
 'Subnet Mask' | sed -e 's/.* : //g')\" != \"${netmask}\"",
     }
   }
+
+  if $interface_type != undef {
+    $_manufacturer = $facts.dig('ipmitool_mc_info', 'Manufacturer Name')
+    if $_manufacturer != undef {
+      case $_manufacturer {
+        'Supermicro': {
+          $_raw_check = '0x30 0x70 0x0c'
+          case $interface_type {
+            'dedicated': { $_iface_code = 0 }
+            'shared':    { $_iface_code = 1 }
+            'failover':  { $_iface_code = 2 }
+            default:     { $_iface_code = undef }
+          }
+          if $_iface_code != undef {
+            # lint:ignore:140chars
+            exec { "ipmi_set_interface_type_${_real_lan_channel}":
+              command => "/usr/bin/ipmitool raw ${_raw_check} 1 ${_iface_code}",
+              onlyif  => "/usr/bin/test $(/usr/bin/ipmitool raw ${_raw_check} 0) -ne ${_iface_code}",
+            }
+            # lint:endignore
+          }
+        }
+        'Dell': {
+          $_raw_set   = '0x30 0x24'
+          $_raw_check = '0x30 0x25'
+          case $interface_type {
+            'dedicated': { $_iface_code = 2 }
+            'shared':    { $_iface_code = 0 }
+            'failover':  { $_iface_code = 1 }
+            default:     { $_iface_code = undef }
+          }
+          if $_iface_code != undef {
+            # lint:ignore:140chars
+            exec { "ipmi_set_interface_type_${_real_lan_channel}":
+              command => "/usr/bin/ipmitool raw ${_raw_set} ${_iface_code}",
+              onlyif  => "/usr/bin/test $(/usr/bin/ipmitool raw ${_raw_check}) -ne ${_iface_code}",
+            }
+            # lint:endignore
+          }
+        }
+        default: {
+          # lint:ignore:140chars
+          warning("${_manufacturer} does not have interface type behavior defined in this module.  Can you submit it?")
+          # lint:endignore
+        }
+      }
+    }
+  }
 }
diff --git a/spec/defines/ipmi_network_spec.rb b/spec/defines/ipmi_network_spec.rb
index 09e6e6e..cda5001 100644
--- a/spec/defines/ipmi_network_spec.rb
+++ b/spec/defines/ipmi_network_spec.rb
@@ -5,24 +5,24 @@
 describe 'ipmi::network', type: :define do
   on_supported_os.each do |os, facts|
     context "on #{os}" do
+      let(:title) { 'example' }
+
+      # Base facts without manufacturer — used by most existing tests.
+      # Interface type tests override this via subject-level let(:facts).
       let(:facts) do
         facts.merge(
           {
             ipmitool_mc_info: { IPMI_Puppet_Service_Recommend: 'running' },
-            ipmi: { default: { channel: 1 } }
+            ipmi: { default: { channel: 1 } },
           }
         )
       end
-      let(:title) { 'example' }
 
       describe 'when deploying as dhcp with minimal params' do
-        let(:params) do
-          {
-            type: 'dhcp',
-          }
-        end
+        let(:params) { { type: 'dhcp' } }
 
         it { is_expected.to contain_exec('ipmi_set_dhcp_1') }
+        it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
       end
 
       describe 'when deploying as dhcp with all params' do
@@ -37,6 +37,7 @@
         end
 
         it { is_expected.to contain_exec('ipmi_set_dhcp_1') }
+        it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
       end
 
       describe 'when deploying as static with minimal params' do
@@ -52,6 +53,7 @@
         it { is_expected.to contain_exec('ipmi_set_static_1').that_notifies('Exec[ipmi_set_ipaddr_1]') }
         it { is_expected.to contain_exec('ipmi_set_static_1').that_notifies('Exec[ipmi_set_defgw_1]') }
         it { is_expected.to contain_exec('ipmi_set_static_1').that_notifies('Exec[ipmi_set_netmask_1]') }
+        it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
       end
 
       describe 'when deploying as static with all params' do
@@ -68,6 +70,110 @@
         it { is_expected.to contain_exec('ipmi_set_static_2').that_notifies('Exec[ipmi_set_ipaddr_2]') }
         it { is_expected.to contain_exec('ipmi_set_static_2').that_notifies('Exec[ipmi_set_defgw_2]') }
         it { is_expected.to contain_exec('ipmi_set_static_2').that_notifies('Exec[ipmi_set_netmask_2]') }
+        it { is_expected.not_to contain_exec('ipmi_set_interface_type_2') }
+      end
+
+      describe 'interface_type' do
+        # Shared params for all interface_type tests — type itself is irrelevant
+        # to interface configuration, so use dhcp to keep tests focused.
+        let(:base_params) { { type: 'dhcp', lan_channel: 1 } }
+
+        describe 'when manufacturer fact is absent' do
+          let(:params) { base_params.merge(interface_type: 'dedicated') }
+
+          # ipmitool_mc_info present but no Manufacturer Name key
+          it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
+        end
+
+        describe 'when manufacturer is unknown' do
+          let(:facts) do
+            facts.merge(
+              {
+                ipmitool_mc_info: {
+                  IPMI_Puppet_Service_Recommend: 'running',
+                  'Manufacturer Name' => 'HPE',
+                },
+                ipmi: { default: { channel: 1 } },
+              }
+            )
+          end
+          let(:params) { base_params.merge(interface_type: 'dedicated') }
+
+          it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
+          it { is_expected.to compile.with_warnings }
+        end
+
+        describe 'Supermicro' do
+          let(:facts) do
+            facts.merge(
+              {
+                ipmitool_mc_info: {
+                  IPMI_Puppet_Service_Recommend: 'running',
+                  'Manufacturer Name' => 'Supermicro',
+                },
+                ipmi: { default: { channel: 1 } },
+              }
+            )
+          end
+
+          { 'dedicated' => 0, 'shared' => 1, 'failover' => 2 }.each do |iface_type, code|
+            describe "interface_type => #{iface_type}" do
+              let(:params) { base_params.merge(interface_type: iface_type) }
+
+              it { is_expected.to contain_exec('ipmi_set_interface_type_1')
+                .with_command("/usr/bin/ipmitool raw 0x30 0x70 0x0c 1 #{code}")
+                .with_onlyif("/usr/bin/test $(/usr/bin/ipmitool raw 0x30 0x70 0x0c 0) -ne #{code}") }
+            end
+          end
+        end
+
+        describe 'Dell' do
+          let(:facts) do
+            facts.merge(
+              {
+                ipmitool_mc_info: {
+                  IPMI_Puppet_Service_Recommend: 'running',
+                  'Manufacturer Name' => 'Dell',
+                },
+                ipmi: { default: { channel: 1 } },
+              }
+            )
+          end
+
+          { 'dedicated' => 2, 'shared' => 0, 'failover' => 1 }.each do |iface_type, code|
+            describe "interface_type => #{iface_type}" do
+              let(:params) { base_params.merge(interface_type: iface_type) }
+
+              it { is_expected.to contain_exec('ipmi_set_interface_type_1')
+                .with_command("/usr/bin/ipmitool raw 0x30 0x24 #{code}")
+                .with_onlyif("/usr/bin/test $(/usr/bin/ipmitool raw 0x30 0x25) -ne #{code}") }
+            end
+          end
+        end
+
+        describe 'when interface_type is undef' do
+          let(:facts) do
+            facts.merge(
+              {
+                ipmitool_mc_info: {
+                  IPMI_Puppet_Service_Recommend: 'running',
+                  'Manufacturer Name' => 'Supermicro',
+                },
+                ipmi: { default: { channel: 1 } },
+              }
+            )
+          end
+          let(:params) { base_params }
+
+          # Manufacturer present but interface_type not requested — no exec created
+          it { is_expected.not_to contain_exec('ipmi_set_interface_type_1') }
+        end
+
+        describe 'invalid interface_type value' do
+          let(:params) { base_params.merge(interface_type: 'bonded') }
+
+          it { is_expected.to compile.and_raise_error(%r{interface_type}) }
+        end
       end
     end
   end