diff --git a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
index f8d3667..d897da8 100755
--- a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
+++ b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
@@ -94,7 +94,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate DT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         # Delete ONU Device (To replicate DT workflow)
         Delete Device    ${onu_device_id}
@@ -107,7 +107,7 @@
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds   120s   2s
         ...    Verify ONU Port Is Enabled   ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${src['onu']}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify ONU state in voltha
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    360s    5s    Validate Device
@@ -290,7 +290,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -430,7 +430,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -511,7 +511,7 @@
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         Verify ping is succesful except for given device     ${num_onus}    ${onu_device_id}
         # Remove Subscriber Access (To replicate DT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
 	# Delete ONU Device (To replicate DT workflow)
         Delete Device    ${onu_device_id}
@@ -520,7 +520,7 @@
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds   120s   2s
         ...    Verify ONU Port Is Enabled   ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${src['onu']}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify ONU state in voltha
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    360s    5s    Validate Device
diff --git a/tests/dt-workflow/Voltha_DT_PODTests.robot b/tests/dt-workflow/Voltha_DT_PODTests.robot
old mode 100644
new mode 100755
index 4edb6c9..1f1826b
--- a/tests/dt-workflow/Voltha_DT_PODTests.robot
+++ b/tests/dt-workflow/Voltha_DT_PODTests.robot
@@ -149,7 +149,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Remove Subscriber Access
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure
         ...    Wait Until Keyword Succeeds    60s    2s
@@ -179,7 +179,7 @@
         ...    Validate Device    ENABLED    ACTIVE
         ...    REACHABLE    ${src['onu']}
         # Add Subscriber Access
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -329,7 +329,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate DT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         # Delete ONU Device (To replicate DT workflow)
         Delete Device    ${onu_device_id}
diff --git a/tests/functional/Voltha_AlarmTests.robot b/tests/functional/Voltha_AlarmTests.robot
index fdc0069..9b7da61 100755
--- a/tests/functional/Voltha_AlarmTests.robot
+++ b/tests/functional/Voltha_AlarmTests.robot
@@ -376,8 +376,9 @@
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${teardown_device}    Delete All Devices and Verify
     Run Keyword If    ${teardown_device}    Test Empty Device List
-    Run Keyword If    ${teardown_device}    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+    Run Keyword If    ${teardown_device}    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
     ...    device-remove ${of_id}
+    Close All ONOS SSH Connections
 
 # Onu Alarms
 
diff --git a/tests/functional/Voltha_ErrorScenarios.robot b/tests/functional/Voltha_ErrorScenarios.robot
old mode 100644
new mode 100755
index ec1a9a0..d41a7d6
--- a/tests/functional/Voltha_ErrorScenarios.robot
+++ b/tests/functional/Voltha_ErrorScenarios.robot
@@ -326,3 +326,4 @@
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     #Restore all ONUs
 #    Run Keyword If    ${has_dataplane}    RestoreONUs    ${num_onus}
+    Close All ONOS SSH Connections
diff --git a/tests/functional/Voltha_FailureScenarios.robot b/tests/functional/Voltha_FailureScenarios.robot
old mode 100644
new mode 100755
index 37f1418..4cafe6c
--- a/tests/functional/Voltha_FailureScenarios.robot
+++ b/tests/functional/Voltha_FailureScenarios.robot
@@ -17,7 +17,7 @@
 Suite Setup       Setup Suite
 Test Setup        Setup
 Test Teardown     Teardown
-#Suite Teardown    Teardown Suite
+Suite Teardown    Teardown Suite
 Library           Collections
 Library           String
 Library           OperatingSystem
@@ -88,7 +88,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate ATT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
 
         Enable Switch Outlet    ${src['power_switch_port']}
@@ -112,7 +112,7 @@
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
         ...    Verify ONU in AAA-Users    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify that no pending flows exist for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
@@ -321,7 +321,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -564,7 +564,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -674,7 +674,7 @@
     ...    Running
     FOR    ${I}    IN RANGE    0    ${num_all_onus}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        #Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        #Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         #...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         ${src}=    Set Variable    ${hosts.src[${I}]}
         ${dst}=    Set Variable    ${hosts.dst[${I}]}
@@ -683,7 +683,7 @@
         ${onu_port}=    Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Get ONU Port in ONOS    ${src['onu']}    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure    Validate DHCP and Ping    True
         ...    True    ${src['dp_iface_name']}    ${src['s_tag']}    ${src['c_tag']}    ${dst['dp_iface_ip_qinq']}
@@ -739,7 +739,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate ATT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Verify ping is succesful except for given device     ${num_all_onus}    ${onu_device_id}
         Sleep    40s
@@ -763,7 +763,7 @@
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
         ...    Verify ONU in AAA-Users    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify that no pending flows exist for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
@@ -796,3 +796,7 @@
     Delete All Devices and Verify
     # Execute normal test Setup Keyword
     Setup
+
+Teardown Suite
+    [Documentation]    Clean up ONOS SSH connections
+    Close All ONOS SSH Connections
diff --git a/tests/functional/Voltha_FailureScenarios2.robot b/tests/functional/Voltha_FailureScenarios2.robot
old mode 100644
new mode 100755
index 8047963..137fc9b
--- a/tests/functional/Voltha_FailureScenarios2.robot
+++ b/tests/functional/Voltha_FailureScenarios2.robot
@@ -17,7 +17,7 @@
 Suite Setup       Setup Suite
 Test Setup        Setup
 Test Teardown     Teardown
-#Suite Teardown    Teardown Suite
+Suite Teardown    Teardown Suite
 Library           Collections
 Library           String
 Library           OperatingSystem
@@ -133,7 +133,7 @@
     ...    Running
     FOR    ${I}    IN RANGE    0    ${num_onus}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        #Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        #Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         #...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         ${src}=    Set Variable    ${hosts.src[${I}]}
         ${dst}=    Set Variable    ${hosts.dst[${I}]}
@@ -141,7 +141,7 @@
         ${onu_port}=    Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Get ONU Port in ONOS    ${src['onu']}    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
 	# Verify DHCP-Allocations
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
@@ -156,3 +156,7 @@
 Setup Suite
     [Documentation]    Set up the test suite
     Common Test Suite Setup
+
+Teardown Suite
+    [Documentation]    Clean up ONOS SSH connections
+    Close All ONOS SSH Connections
diff --git a/tests/functional/Voltha_MultiOLT_Tests.robot b/tests/functional/Voltha_MultiOLT_Tests.robot
old mode 100644
new mode 100755
index c55a8cc..bfff1d3
--- a/tests/functional/Voltha_MultiOLT_Tests.robot
+++ b/tests/functional/Voltha_MultiOLT_Tests.robot
@@ -17,7 +17,7 @@
 Suite Setup       Setup Suite
 Test Setup        Setup
 Test Teardown     Teardown
-#Suite Teardown    Teardown Suite
+Suite Teardown    Teardown Suite
 Library           Collections
 Library           String
 Library           OperatingSystem
@@ -182,3 +182,7 @@
     # Performing Sanity Test to make sure subscribers are all AUTH+DHCP and pingable
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Wait Until Keyword Succeeds    ${timeout}    2s    Perform Sanity Test
+
+Teardown Suite
+    [Documentation]    Clean up ONOS SSH connections
+    Close All ONOS SSH Connections
diff --git a/tests/functional/Voltha_PODTests.robot b/tests/functional/Voltha_PODTests.robot
old mode 100644
new mode 100755
index d59a075..dea6d12
--- a/tests/functional/Voltha_PODTests.robot
+++ b/tests/functional/Voltha_PODTests.robot
@@ -143,7 +143,7 @@
         ${onu_device_id}=    Get Device ID From SN    ${src['onu']}
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Verify No Pending Flows For ONU    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${onu_port}
@@ -151,7 +151,7 @@
         ...    Wait Until Keyword Succeeds    60s    2s
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Verify No Pending Flows For ONU    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${onu_port}
@@ -186,7 +186,7 @@
         ...    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         Run Keyword And Ignore Error    Login And Run Command On Remote System    ps -ef | grep dhclient    ${src['ip']}
         ...    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Sleep    15s
         Run Keyword And Ignore Error    Login And Run Command On Remote System    ps -ef | grep dhclient    ${src['ip']}
@@ -202,7 +202,7 @@
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         ...    ${dst['dp_iface_name']}    ${dst['ip']}    ${dst['user']}    ${dst['pass']}    ${dst['container_type']}
         ...    ${dst['container_name']}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Verify No Pending Flows For ONU    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${onu_port}
@@ -239,7 +239,7 @@
         ...    Verify ONU Port Is Enabled   ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${src['onu']}
         Disable Device    ${onu_device_id}
         Wait Until Keyword Succeeds    ${timeout}    2s    Test Devices Disabled in VOLTHA    Id=${onu_device_id}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure
         ...    Wait Until Keyword Succeeds    60s    2s    Check Ping
@@ -255,7 +255,7 @@
         ...    ${src['container_type']}    ${src['container_name']}
         Wait Until Keyword Succeeds    ${timeout}    2s    Verify ONU in AAA-Users    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    ${onu_port}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify subscriber access flows are added for the ONU port
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s
@@ -305,7 +305,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate ATT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
     END
     #Enable the OLT back and check ONU, OLT status are back to "ACTIVE"
diff --git a/tests/functional/Voltha_ScaleFunctionalTests.robot b/tests/functional/Voltha_ScaleFunctionalTests.robot
old mode 100644
new mode 100755
index f7b0cc9..3dd090a
--- a/tests/functional/Voltha_ScaleFunctionalTests.robot
+++ b/tests/functional/Voltha_ScaleFunctionalTests.robot
@@ -113,7 +113,7 @@
         ${onu_port}=    Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Get ONU Port in ONOS    ${src['onu']}    ${of_id}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
     END
 
@@ -194,8 +194,9 @@
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${teardown_device}    Delete Device and Verify
     Run Keyword If    ${teardown_device}    Test Empty Device List
-    Run Keyword If    ${teardown_device}    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+    Run Keyword If    ${teardown_device}    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
     ...    device-remove ${of_id}
+    Close All ONOS SSH Connections
 
 Clean Up Linux
     [Documentation]    Kill processes and clean up interfaces on src+dst servers
diff --git a/tests/openonu-go-adapter/Voltha_ONUStateTests.robot b/tests/openonu-go-adapter/Voltha_ONUStateTests.robot
index 82454be..18928c7 100755
--- a/tests/openonu-go-adapter/Voltha_ONUStateTests.robot
+++ b/tests/openonu-go-adapter/Voltha_ONUStateTests.robot
@@ -348,7 +348,7 @@
         Do Onu Flow Check Per OLT    ${of_id}    ${nni_port}    ${olt_serial_number}   ${onu_count}
     END
     #log flows for verification
-    ${flowsresult}=    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    flows -s
+    ${flowsresult}=    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    flows -s
     log     ${flowsresult}
     #check  for previous state is kept (normally omci-flows-pushed)
     Sleep    10s
@@ -385,7 +385,7 @@
         ${onu_port}=    Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Get ONU Port in ONOS    ${src['onu']}    ${of_id}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${print2console}    Log    \r\n[${I}] volt-add-subscriber-access ${of_id} ${onu_port}.
         ...   console=yes
@@ -420,7 +420,7 @@
         ${onu_port}=    Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2s
         ...    Get ONU Port in ONOS    ${src['onu']}    ${of_id}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-remove-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${print2console}    Log    \r\n[${I}] volt-remove-subscriber-access ${of_id} ${onu_port}.
         ...    console=yes
diff --git a/tests/scale/Voltha_Scale_Tests.robot b/tests/scale/Voltha_Scale_Tests.robot
old mode 100644
new mode 100755
index 902d367..a9fb66e
--- a/tests/scale/Voltha_Scale_Tests.robot
+++ b/tests/scale/Voltha_Scale_Tests.robot
@@ -283,7 +283,7 @@
 
 Teardown Suite
    [Documentation]    Close the SSH connection to ONOS
-    Close ONOS SSH Connection   ${onos_ssh_connection}
+    Close All ONOS SSH Connections
 
 Compute device IDs
     [Documentation]  Creates a list of ONOS device ID based on the test configuration
diff --git a/tests/software-upgrades/ONU_Upgrade.robot b/tests/software-upgrades/ONU_Upgrade.robot
index 40b4e1d..0230bb1 100755
--- a/tests/software-upgrades/ONU_Upgrade.robot
+++ b/tests/software-upgrades/ONU_Upgrade.robot
@@ -154,3 +154,4 @@
 Teardown Suite
     [Documentation]    Tear down steps for the suite
     Run Keyword If    ${has_dataplane}    Clean Up Linux
+    Close All ONOS SSH Connections
diff --git a/tests/software-upgrades/Voltha_ComponentsUpgrade.robot b/tests/software-upgrades/Voltha_ComponentsUpgrade.robot
index 30016a7..c3ef8aa 100755
--- a/tests/software-upgrades/Voltha_ComponentsUpgrade.robot
+++ b/tests/software-upgrades/Voltha_ComponentsUpgrade.robot
@@ -123,6 +123,7 @@
 Teardown Suite
     [Documentation]    Tear down steps for the suite
     Run Keyword If    ${has_dataplane}    Clean Up Linux
+    Close All ONOS SSH Connections
 
 Create Voltha Comp Under Test List
     [Documentation]    Creates a list of Voltha Components to Test from the input variable string
diff --git a/tests/tt-workflow/Voltha_TT_FailureScenarios.robot b/tests/tt-workflow/Voltha_TT_FailureScenarios.robot
index 02a56a0..563ac0e 100755
--- a/tests/tt-workflow/Voltha_TT_FailureScenarios.robot
+++ b/tests/tt-workflow/Voltha_TT_FailureScenarios.robot
@@ -91,7 +91,7 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate TT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Sleep    5s
         # Enable Power Switch
@@ -100,7 +100,7 @@
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds   120s   2s
         ...    Verify ONU Port Is Enabled   ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${src['onu']}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify ONU state in voltha
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    360s    5s    Validate Device
@@ -194,13 +194,13 @@
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
         # Remove Subscriber Access (To replicate TT workflow)
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         # Check ONU port is Enabled in ONOS
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds   120s   2s
         ...    Verify ONU Port Is Enabled   ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}    ${src['onu']}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    2
-        ...    Execute ONOS CLI Command    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+        ...    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
         ...    volt-add-subscriber-access ${of_id} ${onu_port}
         # Verify ONU state in voltha
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    ${timeout}    5s    Validate Device
@@ -480,6 +480,7 @@
     [Documentation]    Tear down steps for the suite
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${teardown_device}    Delete All Devices and Verify
+    Close All ONOS SSH Connections
 
 Clear All Devices Then Create New Device
     [Documentation]    Remove any devices from VOLTHA and ONOS & then Create new devices
diff --git a/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot b/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
index 69d8b2c..009bc65 100755
--- a/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
+++ b/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
@@ -228,3 +228,4 @@
     [Documentation]    Tear down steps for the suite
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${teardown_device}    Delete All Devices And Verify
+    Close All ONOS SSH Connections
diff --git a/tests/tt-workflow/Voltha_TT_PODTests.robot b/tests/tt-workflow/Voltha_TT_PODTests.robot
index 048b72b..9f46a75 100755
--- a/tests/tt-workflow/Voltha_TT_PODTests.robot
+++ b/tests/tt-workflow/Voltha_TT_PODTests.robot
@@ -184,7 +184,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         # Remove Subscriber Access
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-remove-subscriber-access ${of_id} ${onu_port}
         Run Keyword If    ${has_dataplane} and '${service_type}' != 'mcast'
         ...    Wait Until Keyword Succeeds    ${timeout}    2s
@@ -194,7 +194,7 @@
         Wait Until Keyword Succeeds    ${timeout}    5s    Validate Device Flows
         ...    ${onu_device_id}    0
         # Add Subscriber Access
-        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
+        Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command use single connection    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}
         Run Keyword And Continue On Failure    Wait Until Keyword Succeeds    360s    5s
         ...    Validate Device    ENABLED    ACTIVE
@@ -267,3 +267,4 @@
     [Documentation]    Tear down steps for the suite
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${teardown_device}    Delete All Devices And Verify
+    Close All ONOS SSH Connections