diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index 834c010..d9b2848 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -83,6 +83,7 @@
         cls.fw_rules = []
         cls.fw_policies = []
         cls.ipsecpolicies = []
+        cls.ethertype = "IPv" + str(cls._ip_version)
 
     @classmethod
     def resource_cleanup(cls):