virtual interfaces operations & unit tests; networks unit tests
diff --git a/rackspace/networking/v2/virtualinterfaces/urls.go b/rackspace/networking/v2/virtualinterfaces/urls.go
index 4f91359..9e5693e 100644
--- a/rackspace/networking/v2/virtualinterfaces/urls.go
+++ b/rackspace/networking/v2/virtualinterfaces/urls.go
@@ -1 +1,15 @@
 package virtualinterfaces
+
+import "github.com/rackspace/gophercloud"
+
+func listURL(c *gophercloud.ServiceClient, instanceID string) string {
+	return c.ServiceURL("servers", instanceID, "os-virtual-interfacesv2")
+}
+
+func createURL(c *gophercloud.ServiceClient, instanceID string) string {
+	return c.ServiceURL("servers", instanceID, "os-virtual-interfacesv2")
+}
+
+func deleteURL(c *gophercloud.ServiceClient, instanceID, interfaceID string) string {
+	return c.ServiceURL("servers", instanceID, "os-virtual-interfacesv2", interfaceID)
+}