diff --git a/virtualbmc/tests/unit/test_vbmc.py b/virtualbmc/tests/unit/test_vbmc.py
index 95848e1..dec32f4 100644
--- a/virtualbmc/tests/unit/test_vbmc.py
+++ b/virtualbmc/tests/unit/test_vbmc.py
@@ -103,7 +103,7 @@ class VirtualBMCTestCase(base.TestCase):
                                    mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.set_boot_device('network')
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xc0, ret)
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
     def test_set_boot_device_unkown_device_error(self, mock_libvirt_domain,
@@ -135,7 +135,7 @@ class VirtualBMCTestCase(base.TestCase):
                                    mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.get_power_state()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open,
                                    readonly=True)
 
@@ -159,7 +159,7 @@ class VirtualBMCTestCase(base.TestCase):
     def test_pulse_diag_error(self, mock_libvirt_domain, mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.pulse_diag()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         mock_libvirt_domain.return_value.injectNMI.assert_not_called()
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
@@ -183,7 +183,7 @@ class VirtualBMCTestCase(base.TestCase):
     def test_power_off_error(self, mock_libvirt_domain, mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.power_off()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         mock_libvirt_domain.return_value.destroy.assert_not_called()
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
@@ -207,7 +207,7 @@ class VirtualBMCTestCase(base.TestCase):
     def test_power_reset_error(self, mock_libvirt_domain, mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.power_reset()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         mock_libvirt_domain.return_value.reset.assert_not_called()
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
@@ -234,7 +234,7 @@ class VirtualBMCTestCase(base.TestCase):
                                   mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.power_shutdown()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         mock_libvirt_domain.return_value.shutdown.assert_not_called()
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
@@ -258,7 +258,7 @@ class VirtualBMCTestCase(base.TestCase):
     def test_power_on_error(self, mock_libvirt_domain, mock_libvirt_open):
         mock_libvirt_domain.side_effect = libvirt.libvirtError('boom')
         ret = self.vbmc.power_on()
-        self.assertEqual(0xd5, ret)
+        self.assertEqual(0xC0, ret)
         self.assertFalse(mock_libvirt_domain.return_value.create.called)
         self._assert_libvirt_calls(mock_libvirt_domain, mock_libvirt_open)
 
diff --git a/virtualbmc/vbmc.py b/virtualbmc/vbmc.py
index 58f0d3e..18f700c 100644
--- a/virtualbmc/vbmc.py
+++ b/virtualbmc/vbmc.py
@@ -29,8 +29,8 @@ POWERON = 1
 # Second Generation v2.0 Document Revision 1.1 October 1, 2013
 # https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmi-second-gen-interface-spec-v2-rev1-1.pdf
 #
-# Command not supported in present state
-IPMI_COMMAND_NOT_SUPPORTED = 0xd5
+# Command failed and can be retried
+IPMI_COMMAND_NODE_BUSY = 0xC0
 # Invalid data field in request
 IPMI_INVALID_DATA = 0xcc
 
@@ -138,8 +138,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Failed setting the boot device  %(bootdev)s for '
                       'domain %(domain)s', {'bootdev': device,
                                             'domain': self.domain_name})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def get_power_state(self):
         LOG.debug('Get power state called for domain %s', self.domain_name)
@@ -152,8 +152,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error getting the power state of domain %(domain)s. '
                       'Error: %(error)s', {'domain': self.domain_name,
                                            'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
         return POWEROFF
 
@@ -168,8 +168,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error powering diag the domain %(domain)s. '
                       'Error: %(error)s' % {'domain': self.domain_name,
                                             'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def power_off(self):
         LOG.debug('Power off called for domain %s', self.domain_name)
@@ -182,8 +182,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error powering off the domain %(domain)s. '
                       'Error: %(error)s' % {'domain': self.domain_name,
                                             'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def power_on(self):
         LOG.debug('Power on called for domain %s', self.domain_name)
@@ -196,8 +196,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error powering on the domain %(domain)s. '
                       'Error: %(error)s' % {'domain': self.domain_name,
                                             'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def power_shutdown(self):
         LOG.debug('Soft power off called for domain %s', self.domain_name)
@@ -210,8 +210,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error soft powering off the domain %(domain)s. '
                       'Error: %(error)s' % {'domain': self.domain_name,
                                             'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def power_reset(self):
         LOG.debug('Power reset called for domain %s', self.domain_name)
@@ -224,8 +224,8 @@ class VirtualBMC(bmc.Bmc):
             LOG.error('Error reseting the domain %(domain)s. '
                       'Error: %(error)s' % {'domain': self.domain_name,
                                             'error': e})
-            # Command not supported in present state
-            return IPMI_COMMAND_NOT_SUPPORTED
+            # Command failed, but let client to retry
+            return IPMI_COMMAND_NODE_BUSY
 
     def is_active(self):
         try: