diff --git a/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.params b/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.params
index 3799982..9dfa7a4 100644
--- a/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.params
+++ b/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.params
@@ -1,6 +1,6 @@
 <PARAMS>
 
-    <testcases>1,2,1,2,1,2,1,2</testcases>
+    <testcases>0,1,2,1,2,1,2,1,2</testcases>
 
     <SCALE>1,3,5,7</SCALE>
     <max>7</max>
@@ -14,30 +14,33 @@
         <skipCleanInstall>yes</skipCleanInstall>
         <warmUp>5</warmUp>
         <sampleSize>20</sampleSize>
-        <wait></wait>
         <intents>1,100,1000</intents>                       #list format, will be split on ','
-        <debug>True</debug>
-
-        <s1>1,1,1,1,1,1,1,1</s1>
-        <s3>2,2,1,1,3,3,3,1</s3>
-        <s5>2,2,1,1,3,4,5,3</s5>
-        <s7>2,3,1,1,5,6,7,4</s7>
-
+        <ingress>null:0000000000000001/0</ingress>
+        <egress>null:0000000000000007/0</egress>
+        <debug>False</debug>
     </TEST>
-
-    <METRICS>
-        <Submitted>0</Submitted>
-        <Installed>1</Installed>
-        <Failed>0</Failed>
-        <Withdraw>0</Withdraw>
-        <Withdrawn>0</Withdrawn>
-    </METRICS>
+    <DATABASE>
+        <file>/tmp/IntentRerouteLatDB</file>
+    </DATABASE>
 
     <GIT>
-        <autopull>off</autopull>
-        <checkout>master</checkout>
+        <gitPull>False</gitPull>
+        <gitBranch>master</gitBranch>
     </GIT>
 
+    <ATTEMPTS>
+        <verify>3</verify>
+    </ATTEMPTS>
+
+    <SLEEP>
+        <startup>10</startup>
+        <install>10</install>
+        <verify>3</verify>
+        <reroute>3</reroute>
+        # timeout for pexpect
+        <timeout>300</timeout>
+    </SLEEP>
+
     <CTRL>
         <USER>sdn</USER>
 
diff --git a/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.py b/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.py
index 0c4d950..182f4b6 100644
--- a/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.py
+++ b/TestON/tests/SCPF/SCPFintentRerouteLat/SCPFintentRerouteLat.py
@@ -1,419 +1,366 @@
-# ScaleOutTemplate
-#
-# CASE1 starts number of nodes specified in param file
-#
-# cameron@onlab.us
-
-import sys
-import os.path
-
+# SCPFintentRerouteLat
+"""
+SCPFintentRerouteLat
+    - Test Intent Reroute Latency
+    - Test Algorithm:
+        1. Start Null Provider reroute Topology
+        2. Using Push-test-intents to push batch size intents from switch 1 to switch 7
+        3. Cut the link between switch 3 and switch 4 (the path will reroute to switch 8)
+        4. Get the topology time stamp
+        5. Get Intent reroute(Installed) time stamp from each nodes
+        6. Use the latest intent time stamp subtract topology time stamp
+    - This test will run 5 warm up by default, warm up iteration can be setup in Param file
+    - The intent batch size will default set to 1, 100, and 1000, also can be set in Param file
+    - The unit of the latency result is milliseconds
+"""
 
 class SCPFintentRerouteLat:
-
-    def __init__( self ):
+    def __init__(self):
         self.default = ''
 
-    def CASE1( self, main ):
+    def CASE0( self, main ):
+        '''
+        - GIT
+        - BUILDING ONOS
+            Pull specific ONOS branch, then Build ONOS ono ONOS Bench.
+            This step is usually skipped. Because in a Jenkins driven automated
+            test env. We want Jenkins jobs to pull&build for flexibility to handle
+            different versions of ONOS.
+        - Construct tests variables
+        '''
+        gitPull = main.params['GIT']['gitPull']
+        gitBranch = main.params['GIT']['gitBranch']
 
+        main.case("Pull onos branch and build onos on Teststation.")
+
+        if gitPull == 'True':
+            main.step("Git Checkout ONOS branch: " + gitBranch)
+            stepResult = main.ONOSbench.gitCheckout(branch=gitBranch)
+            utilities.assert_equals(expect=main.TRUE,
+                                    actual=stepResult,
+                                    onpass="Successfully checkout onos branch.",
+                                    onfail="Failed to checkout onos branch. Exiting test...")
+            if not stepResult: main.exit()
+
+            main.step("Git Pull on ONOS branch:" + gitBranch)
+            stepResult = main.ONOSbench.gitPull()
+            utilities.assert_equals(expect=main.TRUE,
+                                    actual=stepResult,
+                                    onpass="Successfully pull onos. ",
+                                    onfail="Failed to pull onos. Exiting test ...")
+            if not stepResult: main.exit()
+
+            main.step("Building ONOS branch: " + gitBranch)
+            stepResult = main.ONOSbench.cleanInstall(skipTest=True)
+            utilities.assert_equals(expect=main.TRUE,
+                                    actual=stepResult,
+                                    onpass="Successfully build onos.",
+                                    onfail="Failed to build onos. Exiting test...")
+            if not stepResult: main.exit()
+
+        else:
+            main.log.warn("Skipped pulling onos and Skipped building ONOS")
+
+        main.apps = main.params['ENV']['cellApps']
+        main.BENCHUser = main.params['BENCH']['user']
+        main.BENCHIp = main.params['BENCH']['ip1']
+        main.MN1Ip = main.params['MN']['ip1']
+        main.maxNodes = int(main.params['max'])
+        main.skipMvn = main.params['TEST']['skipCleanInstall']
+        main.cellName = main.params['ENV']['cellName']
+        main.scale = (main.params['SCALE']).split(",")
+        main.dbFileName = main.params['DATABASE']['file']
+        main.timeout = int(main.params['SLEEP']['timeout'])
+        main.startUpSleep = int(main.params['SLEEP']['startup'])
+        main.installSleep = int(main.params['SLEEP']['install'])
+        main.verifySleep = int(main.params['SLEEP']['verify'])
+        main.verifyAttempts = int(main.params['ATTEMPTS']['verify'])
+        main.sampleSize = int(main.params['TEST']['sampleSize'])
+        main.warmUp = int(main.params['TEST']['warmUp'])
+        main.intentsList = (main.params['TEST']['intents']).split(",")
+        main.ingress = main.params['TEST']['ingress']
+        main.egress = main.params['TEST']['egress']
+        main.debug = main.params['TEST']['debug']
+        for i in range(0, len(main.intentsList)):
+            main.intentsList[i] = int(main.intentsList[i])
+            # Create DataBase file
+        main.log.info("Create Database file " + main.dbFileName)
+        resultsDB = open(main.dbFileName, "w+")
+        resultsDB.close()
+
+    def CASE1( self, main ):
+        '''
+            clean up test environment and set up
+        '''
         import time
 
-        global init
-        try:
-            if type(init) is not bool:
-                init = False
-        except NameError:
-            init = False
+        main.log.info("Get ONOS cluster IP")
+        print(main.scale)
+        main.numCtrls = int(main.scale[0])
+        main.ONOSip = []
+        main.maxNumBatch = 0
+        main.AllONOSip = main.ONOSbench.getOnosIps()
+        for i in range(main.numCtrls):
+            main.ONOSip.append(main.AllONOSip[i])
+        main.log.info(main.ONOSip)
+        main.CLIs = []
+        main.log.info("Creating list of ONOS cli handles")
+        for i in range(main.numCtrls):
+            main.CLIs.append(getattr(main, 'ONOS%scli' % (i + 1)))
 
-        #Load values from params file
-        checkoutBranch = main.params[ 'GIT' ][ 'checkout' ]
-        gitPull = main.params[ 'GIT' ][ 'autopull' ]
-        cellName = main.params[ 'ENV' ][ 'cellName' ]
-        Apps = main.params[ 'ENV' ][ 'cellApps' ]
-        BENCHUser = main.params[ 'BENCH' ][ 'user' ]
-        BENCHIp = main.params[ 'BENCH' ][ 'ip1' ]
-        MN1Ip = main.params[ 'MN' ][ 'ip1' ]
-        main.maxNodes = int(main.params[ 'max' ])
-        skipMvn = main.params[ 'TEST' ][ 'skipCleanInstall' ]
-        cellName = main.params[ 'ENV' ][ 'cellName' ]
+        if not main.CLIs:
+            main.log.error("Failed to create the list of ONOS cli handles")
+            main.cleanup()
+            main.exit()
 
-        # -- INIT SECTION, ONLY RUNS ONCE -- #
-        if init == False:
-            init = True
-            global clusterCount             #number of nodes running
-            global ONOSIp                   #list of ONOS IP addresses
-            global scale
-            global commit
+        main.commit = main.ONOSbench.getVersion(report=True)
+        main.commit = main.commit.split(" ")[1]
+        main.log.info("Starting up %s node(s) ONOS cluster" % main.numCtrls)
+        main.log.info("Safety check, killing all ONOS processes" +
+                      " before initiating environment setup")
 
-            clusterCount = 0
-            ONOSIp = [ 0 ]
-            scale = (main.params[ 'SCALE' ]).split(",")
-            clusterCount = int(scale[0])
+        for i in range(main.numCtrls):
+            main.ONOSbench.onosDie(main.ONOSip[i])
 
-            #Populate ONOSIp with ips from params
-            ONOSIp = [0]
-            ONOSIp.extend(main.ONOSbench.getOnosIps())
+        main.log.info("NODE COUNT = %s" % main.numCtrls)
 
-            print("-----------------" + str(ONOSIp))
-            #mvn clean install, for debugging set param 'skipCleanInstall' to yes to speed up test
-            if skipMvn != "yes":
-                mvnResult = main.ONOSbench.cleanInstall()
+        # tempOnosIp = []
+        # for i in range(main.numCtrls):
+        #    tempOnosIp.append(main.AllONOSip[i])
+        # print(tempOnosIp)
+        main.ONOSbench.createCellFile(main.ONOSbench.ip_address,
+                                      main.cellName,
+                                      main.MN1Ip,
+                                      main.apps,
+                                      main.ONOSip)
+        main.step("Apply cell to environment")
+        cellResult = main.ONOSbench.setCell(main.cellName)
+        verifyResult = main.ONOSbench.verifyCell()
+        stepResult = cellResult and verifyResult
+        utilities.assert_equals(expect=main.TRUE,
+                                actual=stepResult,
+                                onpass="Successfully applied cell to " + \
+                                       "environment",
+                                onfail="Failed to apply cell to environment ")
 
-            #git
-            main.step( "Git checkout and pull " + checkoutBranch )
-            if gitPull == 'on':
-                checkoutResult = main.ONOSbench.gitCheckout( checkoutBranch )
-                pullResult = main.ONOSbench.gitPull()
-
-            else:
-                checkoutResult = main.TRUE
-                pullResult = main.TRUE
-                main.log.info( "Skipped git checkout and pull" )
-
-            commit = main.ONOSbench.getVersion()
-            commit = (commit.split(" "))[1]
-
-            resultsDB = open("/tmp/IntentRerouteLatDB", "w+")
-            resultsDB.close()
-
-        # -- END OF INIT SECTION --#
-
-        clusterCount = int(scale[0])
-        scale.remove(scale[0])
-
-        #kill off all onos processes
-        main.log.step("Safety check, killing all ONOS processes")
-        main.log.step("before initiating environment setup")
-        for node in range(1, main.maxNodes + 1):
-            main.ONOSbench.onosDie(ONOSIp[node])
-
-        #Uninstall everywhere
-        main.log.step( "Cleaning Enviornment..." )
-        for i in range(1, main.maxNodes + 1):
-            main.log.info(" Uninstalling ONOS " + str(i) )
-            main.ONOSbench.onosUninstall( ONOSIp[i] )
-
-        #construct the cell file
-        main.log.info("Creating cell file")
-        cellIp = []
-        for node in range (1, clusterCount + 1):
-            cellIp.append(ONOSIp[node])
-
-        main.ONOSbench.createCellFile(BENCHIp,cellName,MN1Ip,str(Apps), cellIp)
-
-        main.step( "Set Cell" )
-        main.ONOSbench.setCell(cellName)
-
-        main.step( "Creating ONOS package" )
+        main.step("Creating ONOS package")
         packageResult = main.ONOSbench.onosPackage()
+        stepResult = packageResult
+        utilities.assert_equals(expect=main.TRUE,
+                                actual=stepResult,
+                                onpass="Successfully created ONOS package",
+                                onfail="Failed to create ONOS package")
 
-        main.step( "verify cells" )
-        verifyCellResult = main.ONOSbench.verifyCell()
+        main.step("Uninstall ONOS package on all Nodes")
+        uninstallResult = main.TRUE
+        for i in range(int(main.numCtrls)):
+            main.log.info("Uninstalling package on ONOS Node IP: " + main.ONOSip[i])
+            u_result = main.ONOSbench.onosUninstall(main.ONOSip[i])
+            utilities.assert_equals(expect=main.TRUE, actual=u_result,
+                                    onpass="Test step PASS",
+                                    onfail="Test step FAIL")
+            uninstallResult = (uninstallResult and u_result)
 
-        main.log.report( "Initializing " + str( clusterCount ) + " node cluster." )
-        for node in range(1, clusterCount + 1):
-            main.log.info("Starting ONOS " + str(node) + " at IP: " + ONOSIp[node])
-            main.ONOSbench.onosInstall( ONOSIp[node])
+        main.step("Install ONOS package on all Nodes")
+        installResult = main.TRUE
+        for i in range(int(main.numCtrls)):
+            main.log.info("Installing package on ONOS Node IP: " + main.ONOSip[i])
+            i_result = main.ONOSbench.onosInstall(node=main.ONOSip[i])
+            utilities.assert_equals(expect=main.TRUE, actual=i_result,
+                                    onpass="Test step PASS",
+                                    onfail="Test step FAIL")
+            installResult = installResult and i_result
 
-        for node in range(1, clusterCount + 1):
-            for i in range( 2 ):
-                isup = main.ONOSbench.isup( ONOSIp[node] )
-                if isup:
-                    main.log.info("ONOS " + str(node) + " is up\n")
-                    break
-            if not isup:
-                main.log.report( "ONOS " + str(node) + " didn't start!" )
-        main.log.info("Startup sequence complete")
+        main.step("Verify ONOS nodes UP status")
+        statusResult = main.TRUE
+        for i in range(int(main.numCtrls)):
+            main.log.info("ONOS Node " + main.ONOSip[i] + " status:")
+            onos_status = main.ONOSbench.onosStatus(node=main.ONOSip[i])
+            utilities.assert_equals(expect=main.TRUE, actual=onos_status,
+                                    onpass="Test step PASS",
+                                    onfail="Test step FAIL")
+            statusResult = (statusResult and onos_status)
+        time.sleep(2)
+        main.step("Start ONOS CLI on all nodes")
+        cliResult = main.TRUE
+        main.log.step(" Start ONOS cli using thread ")
+        startCliResult = main.TRUE
+        pool = []
+        main.threadID = 0
+        for i in range(int(main.numCtrls)):
+            t = main.Thread(target=main.CLIs[i].startOnosCli,
+                            threadID=main.threadID,
+                            name="startOnosCli",
+                            args=[main.ONOSip[i]],
+                            kwargs={"onosStartTimeout": main.timeout})
+            pool.append(t)
+            t.start()
+            main.threadID = main.threadID + 1
+        for t in pool:
+            t.join()
+            startCliResult = startCliResult and t.result
+        time.sleep(main.startUpSleep)
 
-        deviceMastership = (main.params[ 'TEST' ][ "s" + str(clusterCount) ]).split(",")
-        print("Device mastership list: " + str(deviceMastership))
+        # configure apps
+        main.CLIs[0].setCfg("org.onosproject.provider.nil.NullProviders", "deviceCount", value=8)
+        main.CLIs[0].setCfg("org.onosproject.provider.nil.NullProviders", "topoShape", value="reroute")
+        main.CLIs[0].setCfg("org.onosproject.provider.nil.NullProviders", "enabled", value="true")
+        main.CLIs[0].setCfg("org.onosproject.store.flow.impl.DistributedFlowRuleStore", "backupEnabled", value="false")
 
-        main.ONOSbench.onosCfgSet( ONOSIp[1], "org.onosproject.store.flow.impl.DistributedFlowRuleStore", "backupEnabled false")
+        time.sleep(main.startUpSleep)
 
-        main.log.step("Setting up null provider")
-        for i in range(3):
-            main.ONOSbench.onosCfgSet( ONOSIp[1], "org.onosproject.provider.nil.NullProviders", "deviceCount 8")
-            main.ONOSbench.onosCfgSet( ONOSIp[1], "org.onosproject.provider.nil.NullProviders", "topoShape reroute")
-            main.ONOSbench.onosCfgSet( ONOSIp[1], "org.onosproject.provider.nil.NullProviders", "enabled true")
-            time.sleep(5)
-            main.ONOSbench.handle.sendline("onos $OC1 summary")
-            main.ONOSbench.handle.expect(":~")
-            x = main.ONOSbench.handle.before
-            if "devices=8" in x and "links=16," in x:
-                break
-
-        index = 1
-        for node in deviceMastership:
-            for attempt in range(0,10):
-                cmd = ( "onos $OC" + node + """ "device-role null:000000000000000""" + str(index) + " " + ONOSIp[int(node)]  + """ master" """)
-                main.log.info("assigning mastership of device " + str(index) + " to node " + node + ": \n " + cmd + "\n")
-                main.ONOSbench.handle.sendline(cmd)
-                main.ONOSbench.handle.expect(":~")
-                time.sleep(4)
-
-                cmd = ( "onos $OC" + node + " roles|grep 00000" + str(index))
-                main.log.info(cmd)
-                main.ONOSbench.handle.sendline(cmd)
-                main.ONOSbench.handle.expect(":~")
-                check = main.ONOSbench.handle.before
-                main.log.info("CHECK:\n" + check)
-                if ("master=" + ONOSIp[int(node)]) in check:
-                    break
-            index += 1
-
-        main.ONOSbench.logReport(ONOSIp[1], ["ERROR", "WARNING", "EXCEPT"])
+        # Balance Master
+        main.CLIs[0].balanceMasters()
+        if len(main.ONOSip) > 1:
+            main.CLIs[0].deviceRole("null:0000000000000003", main.ONOSip[0])
+            main.CLIs[0].deviceRole("null:0000000000000004", main.ONOSip[0])
 
     def CASE2( self, main ):
-
         import time
         import numpy
         import datetime
-        #from scipy import stats
+        import json
+        # from scipy import stats
 
         ts = time.time()
-
-        sampleSize = int(main.params[ 'TEST' ][ 'sampleSize' ])
-        warmUp = int(main.params[ 'TEST' ][ 'warmUp' ])
-        intentsList = (main.params[ 'TEST' ][ 'intents' ]).split(",")
-        debug = main.params[ 'TEST' ][ 'debug' ]
-        for i in range(0,len(intentsList)):
-            intentsList[i] = int(intentsList[i])
-
-        timestampMetrics = []
-        if main.params['METRICS']['Submitted'] == "1":
-            timestampMetrics.append("Submitted")
-        if main.params['METRICS']['Installed'] == "1":
-            timestampMetrics.append("Installed")
-        if main.params['METRICS']['Failed'] == "1":
-            timestampMetrics.append("Failed")
-        if main.params['METRICS']['Withdraw'] == "1":
-            timestampMetrics.append("Withdraw")
-        if main.params['METRICS']['Withdrawn'] == "1":
-            timestampMetrics.append("Withdrawn")
-        if debug: main.log.info(timestampMetrics)
-
-        if debug == "True":
-            debug = True
-        else:
-            debug = False
-
-        ingress = "null:0000000000000001"
-        egress = "null:0000000000000007"
-
-        for intents in intentsList:
-            main.log.report("Intent Batch size: " + str(intents) + "\n      ")
-            myResult = [["latency", "lastNode"] for x in range(sampleSize)]
-
-            for run in range(0, (warmUp + sampleSize)):
-                if run > warmUp:
-                    main.log.info("Starting test iteration " + str(run-warmUp))
-
-                cmd = """onos $OC1 "push-test-intents -i """
-                cmd += ingress + "/0 "
-                cmd += egress + "/0 "
-                cmd += str(intents) +""" 1" """
-                if debug: main.log.info(cmd)
-
-                withdrawCmd = cmd.replace("intents -i", "intents -w ")
-
-                #push-test-intents
-                main.ONOSbench.handle.sendline(cmd)
-                main.ONOSbench.handle.expect(":~")
-                myRawResult = main.ONOSbench.handle.before
-
-                for i in range(0, 40):
-                    main.ONOSbench.handle.sendline("onos $OC1 summary")
-                    main.ONOSbench.handle.expect(":~")
-                    linkCheck = main.ONOSbench.handle.before
-                    if ("links=16,") in linkCheck and ("flows=" + str(intents*7) + ","):
-                        break
-                    if i == 39:
-                        main.log.error("Flow/link count incorrect, data invalid."+ linkCheck)
-                        main.ONOSbench.logReport(ONOSIp[1], ["ERROR", "WARNING", "EXCEPT"], "d")
-                        #main.ONOSbench.logReport(ONOSIp[(clusterCount-1)], ["ERROR", "WARNING", "EXCEPT"], "d")
-                        main.ONOSbench.sendline("onos $OC1 summary")
-                        main.ONOSbench.sendline("onos $OC1 devices")
-                        main.ONOSbench.sendline("onos $OC1 links")
-                        main.ONOSbench.expect(":~")
-                        main.log.info(main.ONOSbench.before)
-
-                #collect timestamp from link cut
-                cmd = """onos $OC1 null-link "null:0000000000000004/1 null:0000000000000003/2 down" """
-                if debug: main.log.info("COMMAND: " + str(cmd))
-                main.ONOSbench.handle.sendline(cmd)
-                main.ONOSbench.handle.expect(":~")
-
-                cmd = "onos-ssh $OC1 cat /opt/onos/log/karaf.log | grep TopologyManager| tail -1"
-                for i in range(0,10):
-                    main.ONOSbench.handle.sendline(cmd)
-                    time.sleep(2)
-                    main.ONOSbench.handle.expect(":~")
-                    raw = main.ONOSbench.handle.before
-                    #if "NullLinkProvider" in raw and "links=14" in raw:
-                    if "links=14" in raw:
-                        break
-                    if i >= 9:
-                        main.log.error("Expected output not being recieved... continuing")
-                        main.log.info(raw)
-                        break
-                    time.sleep(2)
-
-                if debug: main.log.debug("raw: " + raw)
-
-                temp = raw.splitlines()
-
-                if debug: main.log.debug("temp (after splitlines): " + str(temp))
-
-                # Since the string is deterministic the date is always the 3rd element.
-                # However, if the data were grepping for in the onos log changes then this will
-                # not work. This is why we print out the raw and temp string so we can visually
-                # check if everything is in the correct order. temp should like this:
-                # temp = ['/onos$ onos-ssh $OC1 cat /opt/onos/log/karaf.log | grep Top ', 
-                #         'ologyManager| tail -1', '2015-10-15 12:03:33,736 ... ]
-                temp = temp[2]
-
-                if debug: main.log.debug("temp (checking for date): " + str(temp))
-
-                cutTimestamp = (temp.split(" "))[0] + " " + (temp.split(" "))[1]
-
-                if debug: main.log.info("Cut timestamp: " + cutTimestamp)
-
-                #validate link count and flow count
-                for i in range(0, 40):
-                    main.ONOSbench.handle.sendline("onos $OC1 summary")
-                    main.ONOSbench.handle.expect(":~")
-                    linkCheck = main.ONOSbench.handle.before
-                    #if "links=" + str(7*intents)+ "," in linkCheck and ("flows=" + str(7*intents) + ",") in linkCheck:
-                    if "links=14," in linkCheck and ("flows=" + str(8*intents) + ",") in linkCheck:
-                        break
-                    if i == 39:
-                        main.log.error("Link or flow count incorrect, data invalid." + linkCheck)
-                        main.ONOSbench.logReport(ONOSIp[1], ["ERROR", "WARNING", "EXCEPT"], "d")
-
-                time.sleep(5) #trying to avoid negative values
-
-                #intents events metrics installed timestamp
-                IEMtimestamps = [0]*(clusterCount + 1)
-                installedTemp = [0]*(clusterCount + 1)
-                for node in range(1, clusterCount +1):
-                    cmd = "onos $OC" + str(node) + """ "intents-events-metrics"|grep Timestamp """
-                    raw = ""
-                    while "epoch)" not in raw:
-                        main.ONOSbench.handle.sendline(cmd)
-                        main.ONOSbench.handle.expect(":~")
-                        raw = main.ONOSbench.handle.before
-
-                    print(raw)
-
-                    intentsTimestamps = {}
-                    rawTimestamps = raw.splitlines()
-                    for line in rawTimestamps:
-                        if "Timestamp" in line and "grep" not in line:
-                            metricKey = (line.split(" "))[1]
-                            metricTimestamp = (line.split(" ")[len(line.split(" ")) -1]).replace("epoch)=","")
-                            metricTimestamp = float(metricTimestamp)
-                            metricTimestamp = numpy.divide(metricTimestamp, 1000)
-                            if debug: main.log.info(repr(metricTimestamp))
-                            intentsTimestamps[metricKey] = metricTimestamp
-                            if metricKey == "Installed":
-                                installedTemp[node] = metricTimestamp
-
-                    main.log.info("Node: " + str(node) + " Timestamps: " + str(intentsTimestamps))
-                    IEMtimestamps[node] = intentsTimestamps
-
-                myMax = max(installedTemp)
-                indexOfMax = installedTemp.index(myMax)
-
-                #number crunch
-                for metric in timestampMetrics:     #this is where we sould add support for computing other timestamp metrics
-                    if metric == "Installed":
-                        if run >= warmUp:
-                            main.log.report("link cut timestamp: " + cutTimestamp)
-                            #readableInstalledTimestamp = str(intentsTimestamps["Installed"])
-                            readableInstalledTimestamp = str(myMax)
-
-                            #main.log.report("Intent Installed timestamp: " + str(intentsTimestamps["Installed"]))
-                            main.log.report("Intent Installed timestamp: " + str(myMax))
-
-                            cutEpoch = time.mktime(time.strptime(cutTimestamp, "%Y-%m-%d %H:%M:%S,%f"))
-                            if debug: main.log.info("cutEpoch=" + str(cutEpoch))
-                            #rerouteLatency = float(intentsTimestamps["Installed"] - cutEpoch)
-                            rerouteLatency = float(myMax - cutEpoch)
-
-                            rerouteLatency = numpy.divide(rerouteLatency, 1000)
-                            main.log.report("Reroute latency:" + str(rerouteLatency) + " (seconds)\n    ")
-                            myResult[run-warmUp][0] = rerouteLatency
-                            myResult[run-warmUp][1] = indexOfMax
-                            if debug: main.log.info("Latency: " + str(myResult[run-warmUp][0]))
-                            if debug: main.log.info("last node: " + str(myResult[run-warmUp][1]))
-
-                cmd = """ onos $OC1 null-link "null:0000000000000004/1 null:0000000000000003/2 up" """
-                if debug: main.log.info(cmd)
-                main.ONOSbench.handle.sendline(cmd)
-                main.ONOSbench.handle.expect(":~")
-
-                #wait for intent withdraw
-                main.ONOSbench.handle.sendline(withdrawCmd)
-                main.log.info(withdrawCmd)
-                main.ONOSbench.handle.expect(":~")
-                if debug: main.log.info(main.ONOSbench.handle.before)
-                main.ONOSbench.handle.sendline("onos $OC1 intents|grep WITHDRAWN|wc -l")
-                main.ONOSbench.handle.expect(":~")
-                intentWithdrawCheck = main.ONOSbench.handle.before
-                if (str(intents)) in intentWithdrawCheck:
-                    main.log.info("intents withdrawn")
-                if debug: main.log.info(intentWithdrawCheck)
-
-                # wait for links to be reestablished
-                for i in range(0, 10):
-                    main.ONOSbench.handle.sendline("onos $OC1 summary")
-                    main.ONOSbench.handle.expect(":~")
-                    linkCheck = main.ONOSbench.handle.before
-                    if "links=16," in linkCheck:
-                        break
-                    time.sleep(1)
-                    if i == 9:
-                        main.log.info("Links Failed to reconnect, next iteration of data invalid." + linkCheck)
-
-                if run < warmUp:
-                    main.log.info("Warm up run " + str(run+1) + " completed")
-
-            if debug: main.log.info(myResult)
-            latTemp = []
-            nodeTemp = []
-            for i in myResult:
-                latTemp.append(i[0])
-                nodeTemp.append(i[1])
-
-            mode = {}
-            for i in nodeTemp:
-                if i in mode:
-                    mode[i] += 1
+        print(main.intentsList)
+        for batchSize in main.intentsList:
+            main.log.report("Intent Batch size: " + str(batchSize) + "\n      ")
+            main.LatencyList = []
+            for run in range(0, (main.warmUp + main.sampleSize)):
+                if run >= main.warmUp:
+                    main.log.info("================================================")
+                    main.log.info("Starting test iteration " + str(run - main.warmUp))
+                    main.log.info("================================================")
                 else:
-                    mode[i] = 1
+                    main.log.info("====================Warm Up=====================")
 
-            for i in mode.keys():
-                if mode[i] == max(mode.values()):
-                    nodeMode = i
+                # push intents
+                main.CLIs[0].pushTestIntents(main.ingress, main.egress, batchSize,
+                                             offset=1, options="-i", timeout=main.timeout)
 
-            average = numpy.average(latTemp)
-            stdDev = numpy.std(latTemp)
+                # check links and flows
+                k = 0
+                verify = main.FALSE
+                linkCheck = 0
+                flowsCheck = 0
+                while k <= main.verifyAttempts:
+                    time.sleep(main.verifySleep)
+                    summary = json.loads(main.CLIs[0].summary(timeout=main.timeout))
+                    linkCheck = summary.get("links")
+                    flowsCheck = summary.get("flows")
+                    if linkCheck == 16 and flowsCheck == batchSize * 7:
+                        main.log.info("links: {}, flows: {} ".format(linkCheck, flowsCheck))
+                        verify = main.TRUE
+                        break
+                    k += 1
+                if not verify:
+                    main.log.warn("Links or flows number are not match!")
+                    main.log.warn("links: {}, flows: {} ".format(linkCheck, flowsCheck))
+                    continue
 
-            average = numpy.multiply(average, 1000)
-            stdDev = numpy.multiply(stdDev, 1000)
+                # Bring link down
+                main.CLIs[0].link("0000000000000004/1", "0000000000000003/2", "down",
+                                  timeout=main.timeout, showResponse=False)
+                verify = main.FALSE
+                k = 0
+                topoManagerLog = ""
+                while k <= main.verifyAttempts:
+                    time.sleep(main.verifySleep)
+                    summary = json.loads(main.CLIs[0].summary(timeout=main.timeout))
+                    linkCheck = summary.get("links")
+                    flowsCheck = summary.get("flows")
+                    if linkCheck == 14:
+                        main.log.info("links: {}, flows: {} ".format(linkCheck, flowsCheck))
+                        verify = main.TRUE
+                        break
+                    k += 1
+                if not verify:
+                    main.log.warn("Links number are not match in TopologyManager log!")
+                    main.log.warn(topoManagerLog)
+                    continue
 
-            main.log.report("Scale: " + str(clusterCount) + "  \tIntent batch: " + str(intents))
-            main.log.report("Latency average:................" + str(average))
-            main.log.report("Latency standard deviation:....." + str(stdDev))
-            main.log.report("Mode of last node to respond:..." + str(nodeMode))
+                try:
+                    # expect twice to clean the pexpect buffer
+                    main.ONOSbench.handle.sendline("")
+                    main.ONOSbench.handle.expect("\$")
+                    main.ONOSbench.handle.expect("\$")
+                    # send line by using bench, can't use driver because pexpect buffer problem
+                    cmd = "onos-ssh $OC1 cat /opt/onos/log/karaf.log | grep TopologyManager| tail -1"
+                    main.ONOSbench.handle.sendline(cmd)
+                    time.sleep(1)
+                    main.ONOSbench.handle.expect(":~")
+                    topoManagerLog = main.ONOSbench.handle.before
+                    topoManagerLogTemp = topoManagerLog.splitlines()
+                    # To make sure we get correct topology log
+                    for lines in topoManagerLogTemp:
+                        if "creationTime" in lines:
+                            topoManagerLog = lines
+                    main.log.info("Topology Manager log:")
+                    print(topoManagerLog)
+                    cutTimestamp = float(topoManagerLog.split("creationTime=")[1].split(",")[0])
+                except:
+                    main.log.error("Topology Log is not correct!")
+                    print(topoManagerLog)
+                    # If we got wrong Topology log, we should skip this iteration, and continue for next one
+                    continue
+
+                installedTemp = []
+                time.sleep(1)
+                for cli in main.CLIs:
+                    tempJson = json.loads(cli.intentsEventsMetrics())
+                    Installedtime = tempJson.get('intentInstalledTimestamp').get('value')
+                    installedTemp.append(float(Installedtime))
+                for i in range(0, len(installedTemp)):
+                    main.log.info("ONOS Node {} Installed Time stemp: {}".format((i + 1), installedTemp[i]))
+                maxInstallTime = float(max(installedTemp))
+                if run >= main.warmUp:
+                    main.log.info("Installed time stemp: {0:f}".format(maxInstallTime))
+                    main.log.info("CutTimestamp: {0:f}".format(cutTimestamp))
+                    # Both timeStemps are milliseconds
+                    main.log.info("Latency: {0:f}".format(float(maxInstallTime - cutTimestamp)))
+                    main.LatencyList.append(float(maxInstallTime - cutTimestamp))
+
+                # Verify Summary after we bring up link, and withdrawn intents
+                main.CLIs[0].link("0000000000000004/1", "0000000000000003/2", "up",
+                                  timeout=main.timeout)
+                k = 0
+                verify = main.FALSE
+                linkCheck = 0
+                flowsCheck = 0
+                while k <= main.verifyAttempts:
+                    time.sleep(main.verifySleep)
+                    main.CLIs[0].removeAllIntents(purge=True, sync=True, timeout=main.timeout)
+                    time.sleep(1)
+                    main.CLIs[0].purgeWithdrawnIntents()
+                    summary = json.loads(main.CLIs[0].summary())
+                    linkCheck = summary.get("links")
+                    flowsCheck = summary.get("flows")
+                    intentCheck = summary.get("intents")
+                    if linkCheck == 16 and flowsCheck == 0 and intentCheck == 0:
+                        main.log.info("links: {}, flows: {}, intents: {} ".format(linkCheck, flowsCheck, intentCheck))
+                        verify = main.TRUE
+                        break
+                    k += 1
+                if not verify:
+                    main.log.error("links, flows, or intents are not correct!")
+                    main.log.info("links: {}, flows: {}, intents: {} ".format(linkCheck, flowsCheck, intentCheck))
+                    continue
+
+            aveLatency = 0
+            stdLatency = 0
+            aveLatency = numpy.average(main.LatencyList)
+            stdLatency = numpy.std(main.LatencyList)
+            main.log.report("Scale: " + str(main.numCtrls) + "  \tIntent batch: " + str(batchSize))
+            main.log.report("Latency average:................" + str(aveLatency))
+            main.log.report("Latency standard deviation:....." + str(stdLatency))
             main.log.report("________________________________________________________")
 
-            resultsDB = open("/tmp/IntentRerouteLatDB", "a")
-            resultsDB.write("'" + commit + "',")
-            resultsDB.write(str(clusterCount) + ",")
-            resultsDB.write(str(intents) + ",")
-            resultsDB.write(str(average) + ",")
-            resultsDB.write(str(stdDev) + "\n")
+            resultsDB = open(main.dbFileName, "a")
+            resultsDB.write("'" + main.commit + "',")
+            resultsDB.write(str(main.numCtrls) + ",")
+            resultsDB.write(str(batchSize) + ",")
+            resultsDB.write(str(aveLatency) + ",")
+            resultsDB.write(str(stdLatency) + "\n")
             resultsDB.close()
-
-            main.ONOSbench.logReport(ONOSIp[1], ["ERROR", "WARNING", "EXCEPT"])
-
+        del main.scale[0]