diff --git a/novaclient/tests/unit/v2/test_shell.py b/novaclient/tests/unit/v2/test_shell.py
index 41b2ec616..30728b0c4 100644
--- a/novaclient/tests/unit/v2/test_shell.py
+++ b/novaclient/tests/unit/v2/test_shell.py
@@ -1757,6 +1757,15 @@ class ShellTest(utils.TestCase):
         self.assert_called('POST', '/servers/uuid3/action', body, pos=3)
         self.assert_called('POST', '/servers/uuid4/action', body, pos=4)
 
+    def test_host_evacuate_live_2_25(self):
+        self.run_command('host-evacuate-live hyper', api_version='2.25')
+        self.assert_called('GET', '/os-hypervisors/hyper/servers', pos=0)
+        body = {'os-migrateLive': {'host': None, 'block_migration': 'auto'}}
+        self.assert_called('POST', '/servers/uuid1/action', body, pos=1)
+        self.assert_called('POST', '/servers/uuid2/action', body, pos=2)
+        self.assert_called('POST', '/servers/uuid3/action', body, pos=3)
+        self.assert_called('POST', '/servers/uuid4/action', body, pos=4)
+
     def test_host_evacuate_live_with_target_host(self):
         self.run_command('host-evacuate-live hyper '
                          '--target-host hostname')
@@ -1780,6 +1789,16 @@ class ShellTest(utils.TestCase):
         self.assert_called('POST', '/servers/uuid3/action', body, pos=3)
         self.assert_called('POST', '/servers/uuid4/action', body, pos=4)
 
+    def test_host_evacuate_live_with_block_migration_2_25(self):
+        self.run_command('host-evacuate-live --block-migrate hyper',
+                         api_version='2.25')
+        self.assert_called('GET', '/os-hypervisors/hyper/servers', pos=0)
+        body = {'os-migrateLive': {'host': None, 'block_migration': True}}
+        self.assert_called('POST', '/servers/uuid1/action', body, pos=1)
+        self.assert_called('POST', '/servers/uuid2/action', body, pos=2)
+        self.assert_called('POST', '/servers/uuid3/action', body, pos=3)
+        self.assert_called('POST', '/servers/uuid4/action', body, pos=4)
+
     def test_host_evacuate_live_with_disk_over_commit(self):
         self.run_command('host-evacuate-live --disk-over-commit hyper')
         self.assert_called('GET', '/os-hypervisors/hyper/servers', pos=0)
@@ -1791,6 +1810,11 @@ class ShellTest(utils.TestCase):
         self.assert_called('POST', '/servers/uuid3/action', body, pos=3)
         self.assert_called('POST', '/servers/uuid4/action', body, pos=4)
 
+    def test_host_evacuate_live_with_disk_over_commit_2_25(self):
+        self.assertRaises(SystemExit, self.run_command,
+                          'host-evacuate-live --disk-over-commit hyper',
+                          api_version='2.25')
+
     def test_host_evacuate_list_with_max_servers(self):
         self.run_command('host-evacuate-live --max-servers 1 hyper')
         self.assert_called('GET', '/os-hypervisors/hyper/servers', pos=0)
diff --git a/novaclient/v2/contrib/host_evacuate_live.py b/novaclient/v2/contrib/host_evacuate_live.py
index 794c3a8fa..badc4d1b3 100644
--- a/novaclient/v2/contrib/host_evacuate_live.py
+++ b/novaclient/v2/contrib/host_evacuate_live.py
@@ -27,8 +27,13 @@ def _server_live_migrate(cs, server, args):
     success = True
     error_message = ""
     try:
-        cs.servers.live_migrate(server['uuid'], args.target_host,
-                                args.block_migrate, args.disk_over_commit)
+        # API 2.0->2.24
+        if 'disk_over_commit' in args:
+            cs.servers.live_migrate(server['uuid'], args.target_host,
+                                    args.block_migrate, args.disk_over_commit)
+        else:   # API 2.25+
+            cs.servers.live_migrate(server['uuid'], args.target_host,
+                                    args.block_migrate)
     except Exception as e:
         success = False
         error_message = _("Error while live migrating instance: %s") % e
@@ -47,12 +52,20 @@ def _server_live_migrate(cs, server, args):
     '--block-migrate',
     action='store_true',
     default=False,
-    help=_('Enable block migration.'))
+    help=_('Enable block migration. (Default=False)'),
+    start_version="2.0", end_version="2.24")
+@utils.arg(
+    '--block-migrate',
+    action='store_true',
+    default="auto",
+    help=_('Enable block migration. (Default=auto)'),
+    start_version="2.25")
 @utils.arg(
     '--disk-over-commit',
     action='store_true',
     default=False,
-    help=_('Enable disk overcommit.'))
+    help=_('Enable disk overcommit.'),
+    start_version="2.0", end_version="2.24")
 @utils.arg(
     '--max-servers',
     type=int,