Added coexistence of link local static ipv6 dhcpv6 and SLAAC test

Changes:
    - Added the test case:
    Coexistence Of Link Local Static IPv6 DHCPv6 And SLAAC On BMC

    Tested:
        Ran and Tested on BMC Environment.
Change-Id: I381e147ccbcc022735246f8d0d340107c6e75403
Signed-off-by: Abhijith Naik <Abhijith.Naik@ibm.com>
diff --git a/redfish/managers/test_bmc_ipv6.robot b/redfish/managers/test_bmc_ipv6.robot
index 7d8b902..ce17a9a 100644
--- a/redfish/managers/test_bmc_ipv6.robot
+++ b/redfish/managers/test_bmc_ipv6.robot
@@ -338,6 +338,24 @@
     Check Coexistence Of Link Local And SLAAC
 
 
+Verify Coexistence Of All IPv6 Type Addresses On BMC
+    [Documentation]  Verify coexistence of link local, static, DHCPv6 and SLAAC ipv6 addresses.
+    [Tags]  Verify_Coexistence_Of_All_IPv6_Type_Addresses_On_BMC
+    [Setup]  Run Keywords  Configure IPv6 Address On BMC  ${test_ipv6_addr}  ${test_prefix_length}
+    ...      AND  Get The Initial DHCPv6 Setting On Each Interface  ${1}
+    ...      AND  Set And Verify DHCPv6 Property  Enabled
+    ...      AND  Get The Initial SLAAC Setting On Each Interface  ${1}
+    ...      AND  Set SLAAC Configuration State And Verify  ${True}
+    [Teardown]  Run Keywords  Delete IPv6 Address  ${test_ipv6_addr}
+    ...         AND  Set And Verify DHCPv6 Property  ${dhcpv6_channel_1}  ${1}
+    ...         AND  Set SLAAC Configuration State And Verify  ${slaac_channel_1}  [${HTTP_OK}]  ${1}
+
+    Sleep  ${NETWORK_TIMEOUT}s
+
+    # Verify link local, static, DHCPv6 and SLAAC ipv6 addresses coexist.
+    Verify The Coexistence Of The Address Type  LinkLocal  Static  DHCPv6  SLAAC
+
+
 *** Keywords ***
 
 Suite Setup Execution