diff --git a/nova/virt/zvm/utils.py b/nova/virt/zvm/utils.py
index c65e844..572f4f8 100644
--- a/nova/virt/zvm/utils.py
+++ b/nova/virt/zvm/utils.py
@@ -41,6 +41,16 @@ CONF = cfg.CONF
 CONF.import_opt('instances_path', 'nova.compute.manager')
 
 
+# It means we introduced 'version' concept at 2.8.3.7
+# later on, any new features especially backward incompatible
+# change need a new version such as
+# Support_xxxx = 'x.x.x.x', then we will compare whether
+# The XCAT we are using has higher or lower version than x.x.x.x
+# and do different things according to the version
+# we might INFO in log if version is lower than XCAT_INIT_VERSION
+XCAT_INIT_VERSION = '2.8.3.7'
+
+
 class XCATUrl(object):
     """To return xCAT url for invoking xCAT REST API."""