update skip condition for cisco T2

Signed-off-by: Zhixin Zhu <zhixzhu@cisco.com>

Author: zhixzhu

tests/qos/qos_sai_base.py

@@ -2243,3 +2243,12 @@ def populate_arp_entries(
             self.runPtfTest(
                 ptfhost, testCase=saiQosTest, testParams=testParams
             )
+
+    @pytest.fixture(scope="function", autouse=False)
+    def skip_vanguard(self, get_src_dst_asic_and_duts):
+        src_asic = get_src_dst_asic_and_duts['src_asic']
+        if src_asic.sonichost.facts['platform'] in ["x86_64-88_lc0_36fh_mo-r0", "x86_64-88_lc0_36fh_m-r0"]:
+            pytest.skip(
+                "This test is skipped since this asic is cisco-8000 Q200 longlink.")
+        yield
+        return

tests/qos/test_qos_sai.py

@@ -684,7 +684,7 @@ def testQosSaiPfcXonLimit(
          "lossless_voq_3", "lossless_voq_4"])
     def testQosSaiLosslessVoq(
             self, LosslessVoqProfile, ptfhost, dutTestParams, dutConfig,
-            dutQosConfig, get_src_dst_asic_and_duts
+            dutQosConfig, get_src_dst_asic_and_duts, skip_vanguard
     ):
         """
             Test QoS SAI XOFF limits for various voq mode configurations
@@ -895,6 +895,14 @@ def testQosSaiSharedReservationSize(
             Raises:
                 RunAnsibleModuleFail if ptf test fails
         """
+        if ('modular_chassis' in get_src_dst_asic_and_duts['src_dut'].facts and
+                get_src_dst_asic_and_duts['src_dut'].facts["modular_chassis"] == "True"):
+            if dutConfig['dstDutAsic'] != "pac":
+                pytest.skip("This test is skipped since not enough ports on cisco-8000 "
+                            "T2 Q200.")
+            if "shared_res_size_2" in sharedResSizeKey:
+                pytest.skip("This test is skipped since on cisco-8000 Q100, "
+                            "SQG thresholds have no impact on XOFF thresholds.")
 
         qosConfig = dutQosConfig["param"]
         src_dut_index = get_src_dst_asic_and_duts['src_dut_index']