diff --git a/fence/agents/lib/fencing.py.py b/fence/agents/lib/fencing.py.py

index 3a6e2ab..bb8e3a4 100644

--- a/fence/agents/lib/fencing.py.py

+++ b/fence/agents/lib/fencing.py.py

@@ -657,6 +657,10 @@ def process_input(avail_opt):

 		opt = z

 		##

 		#####

+

+		# This test should NOT be used for stdin input where it should be allowed (and ignored)

+		if "port_as_ip" in device_opt and not "--port-as-ip" in options and "--plug" in options:

+			fail_usage("Parser error: option -n/--plug is not recognized")

 	else:

 		opt = {}

 		name = ""

@@ -788,10 +792,6 @@ def check_input(device_opt, opt):

 		options["--action"] = "off"

 	## automatic detection and set of valid UUID from --plug

-

-	if "port_as_ip" in device_opt and not "--port-as-ip" in options and "--plug" in options:

-		fail_usage("Parser error: option -n/--plug is not recognized")

-

 	if not options.has_key("--username") and \

 			device_opt.count("login") and (device_opt.count("no_login") == 0):

 		fail_usage("Failed: You have to set login name")