diff --git a/src/test/utils/CordContainer.py b/src/test/utils/CordContainer.py
index 24aa6b5..3b62f68 100644
--- a/src/test/utils/CordContainer.py
+++ b/src/test/utils/CordContainer.py
@@ -155,6 +155,22 @@
         self.id = ctn['Id']
         return ctn
 
+    @classmethod
+    def pause_container(cls, image, delay):
+        cnt_list = filter(lambda c: c['Image'] == image, cls.dckr.containers(all=True))
+        for cnt in cnt_list:
+            print('Pause the container %s' %cnt['Id'])
+            if cnt.has_key('State') and cnt['State'] == 'running':
+                cls.dckr.pause(cnt['Id'])
+        if delay != 0:
+           time.sleep(delay)
+           for cnt in cnt_list:
+               print('Unpause the container %s' %cnt['Id'])
+               cls.dckr.unpause(cnt['Id'])
+        else:
+            print('Infinity time pause the container %s' %cnt['Id'])
+        return 'success'
+
     def connect_to_br(self):
         index = 0
         with docker_netns(self.name) as pid:
@@ -191,7 +207,7 @@
                     ip.link('set', index=guest, state='up')
                 index += 1
 
-    def execute(self, cmd, tty = True, stream = False, shell = False):
+    def execute(self, cmd, tty = True, stream = False, shell = False, detach = True):
         res = 0
         if type(cmd) == str:
             cmds = (cmd,)
@@ -203,7 +219,7 @@
             return res
         for c in cmds:
             i = self.dckr.exec_create(container=self.name, cmd=c, tty = tty, privileged = True)
-            self.dckr.exec_start(i['Id'], stream = stream, detach=True)
+            self.dckr.exec_start(i['Id'], stream = stream, detach=detach)
             result = self.dckr.exec_inspect(i['Id'])
             res += 0 if result['ExitCode'] == None else result['ExitCode']
         return res
diff --git a/src/test/utils/EapolAAA.py b/src/test/utils/EapolAAA.py
index 5cf79fd..d256e0b 100644
--- a/src/test/utils/EapolAAA.py
+++ b/src/test/utils/EapolAAA.py
@@ -223,3 +223,45 @@
         code, id, eaplen = unpack("!BBH", p[4:8])
         return code
 
+    @classmethod
+    def eap_invalid_tls_packets_info(self, invalid_field_name = None, invalid_field_value = None):
+        log.info( 'Changing invalid field values in tls auth packets' )
+        if invalid_field_name == 'eapolTlsVersion':
+           global EAPOL_VERSION
+           log.info( 'Changing invalid field values in tls auth packets====== version changing' )
+           EAPOL_VERSION = invalid_field_value
+        if invalid_field_name == 'eapolTlsType':
+           global EAP_TYPE_TLS
+           log.info( 'Changing invalid field values in tls auth packets====== EAP TYPE TLS changing' )
+           EAP_TYPE_TLS = invalid_field_value
+        if invalid_field_name == 'eapolTypeID':
+           global EAP_TYPE_ID
+           log.info( 'Changing invalid field values in tls auth packets====== EAP TYPE TLS changing' )
+           EAP_TYPE_ID = invalid_field_value
+        if invalid_field_name == 'eapolResponse':
+           global EAP_RESPONSE
+           log.info( 'Changing invalid field values in tls auth packets====== EAP TYPE TLS changing' )
+           EAP_RESPONSE = invalid_field_value
+
+
+    @classmethod
+    def eap_tls_packets_field_value_replace(self, invalid_field_name = None):
+        log.info( 'Changing invalid field values in tls auth packets' )
+        if invalid_field_name == 'eapolTlsVersion':
+           global EAPOL_VERSION
+           EAPOL_VERSION = 1
+           log.info( 'Changing invalid field values in tls auth packets====== version changing' )
+        if invalid_field_name == 'eapolTlsType':
+           global EAP_TYPE_TLS
+           EAP_TYPE_TLS = 13
+           log.info( 'Changing invalid field values in tls auth packets====== version changing' )
+        if invalid_field_name == 'eapolTypeID':
+           global EAP_TYPE_ID
+           EAP_TYPE_ID = 1
+           log.info( 'Changing invalid field values in tls auth packets====== version changing' )
+        if invalid_field_name == 'eapolResponse':
+           global EAP_RESPONSE
+           EAP_RESPONSE = 2
+           log.info( 'Changing invalid field values in tls auth packets====== version changing' )
+
+
diff --git a/src/test/utils/IGMP.py b/src/test/utils/IGMP.py
index c91dfdd..7e348bc 100644
--- a/src/test/utils/IGMP.py
+++ b/src/test/utils/IGMP.py
@@ -1,12 +1,9 @@
-# 
 # Copyright 2016-present Ciena Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-# 
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -20,11 +17,13 @@
 
 IGMP_TYPE_MEMBERSHIP_QUERY     = 0x11
 IGMP_TYPE_V3_MEMBERSHIP_REPORT = 0x22
+IGMP_TYPE_V3_MEMBERSHIP_REPORT_NEGATIVE = 0xdd
 IGMP_TYPE_V1_MEMBERSHIP_REPORT = 0x12
 IGMP_TYPE_V2_MEMBERSHIP_REPORT = 0x16
 IGMP_TYPE_V2_LEAVE_GROUP       = 0x17
 
 IGMP_V3_GR_TYPE_INCLUDE           = 0x01
+IGMP_V3_GR_TYPE_INCLUDE_NEGATIVE  = 0xaa
 IGMP_V3_GR_TYPE_EXCLUDE           = 0x02
 IGMP_V3_GR_TYPE_CHANGE_TO_INCLUDE = 0x03
 IGMP_V3_GR_TYPE_CHANGE_TO_EXCLUDE = 0x04
@@ -48,6 +47,7 @@
 
     igmp_v3_gr_types = {
         IGMP_V3_GR_TYPE_INCLUDE: "Include Mode",
+        IGMP_V3_GR_TYPE_INCLUDE_NEGATIVE: "Include Mode in negative scenario",
         IGMP_V3_GR_TYPE_EXCLUDE: "Exclude Mode",
         IGMP_V3_GR_TYPE_CHANGE_TO_INCLUDE: "Change to Include Mode",
         IGMP_V3_GR_TYPE_CHANGE_TO_EXCLUDE: "Change to Exclude Mode",
@@ -149,7 +149,7 @@
         return (byte1 & 0xf0) == 0xe0
 
     @staticmethod
-    def fixup(pkt):
+    def fixup(pkt, invalid_ttl = None):
         """Fixes up the underlying IP() and Ether() headers."""
         assert pkt.haslayer(IGMPv3), "This packet is not an IGMPv4 packet; cannot fix it up"
 
@@ -157,7 +157,10 @@
 
         if pkt.haslayer(IP):
             ip = pkt.getlayer(IP)
-            ip.ttl = 1
+            if invalid_ttl is None:
+               ip.ttl = 1
+            else:
+               ip.ttl = 20
             ip.proto = 2
             ip.tos = 0xc0
             ip.options = [IPOption_Router_Alert()]
@@ -225,7 +228,8 @@
     hexdump(str(pkt))
 
     print "after fixup:"
-    IGMPv3.fixup(pkt)
+
+    IGMPv3.fixup(pkt,'no')
     hexdump(str(pkt))
 
     print "construct v3 membership report - join a single group"