diff --git a/tests/qos/qos_sai_base.py b/tests/qos/qos_sai_base.py
index eec71067415..46cd803288e 100644
--- a/tests/qos/qos_sai_base.py
+++ b/tests/qos/qos_sai_base.py
@@ -32,7 +32,8 @@ class QosBase:
     """
     Common APIs
     """
-    SUPPORTED_T0_TOPOS = ["t0", "t0-64", "t0-116", "t0-35", "dualtor-56", "dualtor-120", "dualtor", "t0-80", "t0-backend"]
+    SUPPORTED_T0_TOPOS = ["t0", "t0-56-po2vlan", "t0-64", "t0-116", "t0-35", "dualtor-56", "dualtor-120", "dualtor",
+                          "t0-80", "t0-backend"]
     SUPPORTED_T1_TOPOS = ["t1-lag", "t1-64-lag", "t1-56-lag", "t1-backend"]
     SUPPORTED_PTF_TOPOS = ['ptf32', 'ptf64']
     SUPPORTED_ASIC_LIST = ["gr", "gb", "td2", "th", "th2", "spc1", "spc2", "spc3", "td3", "th3", "j2c+", "jr2"]
@@ -414,7 +415,7 @@ def __getSchedulerParam(self, dut_asic, port, queue):
 
         return {"schedProfile": schedProfile, "schedWeight": schedWeight}
 
-    def __assignTestPortIps(self, mgFacts):
+    def __assignTestPortIps(self, mgFacts, topo):
         """
             Assign IPs to test ports of DUT host
 
@@ -426,9 +427,19 @@ def __assignTestPortIps(self, mgFacts):
         """
         dutPortIps = {}
         if len(mgFacts["minigraph_vlans"]) > 0:
-            #TODO: handle the case when there are multiple vlans
-            testVlan = next(iter(mgFacts["minigraph_vlans"]))
+            # TODO: handle the case when there are multiple vlans
+            vlans = iter(mgFacts["minigraph_vlans"])
+            testVlan = next(vlans)
             testVlanMembers = mgFacts["minigraph_vlans"][testVlan]["members"]
+            # To support t0-56-po2vlan topo, choose the Vlan with physical ports and remove the lag in Vlan members
+            if topo == 't0-56-po2vlan':
+                if len(testVlanMembers) == 1:
+                    testVlan = next(vlans)
+                    testVlanMembers = mgFacts["minigraph_vlans"][testVlan]["members"]
+                for member in testVlanMembers:
+                    if 'PortChannel' in member:
+                        testVlanMembers.remove(member)
+                        break
 
             testVlanIp = None
             for vlan in mgFacts["minigraph_vlan_interfaces"]:
@@ -769,7 +780,7 @@ def dutConfig(
                             uplinkPortNames.append(intf)
 
             testPortIps[src_dut_index] = {}
-            testPortIps[src_dut_index][src_asic_index] = self.__assignTestPortIps(src_mgFacts)
+            testPortIps[src_dut_index][src_asic_index] = self.__assignTestPortIps(src_mgFacts, topo)
 
             # restore currently assigned IPs
             if len(dutPortIps[src_dut_index][src_asic_index]) != 0: