ignored route syncd error logs for VxLAN tests which toggle DUT inter…

…faces (sonic-net#6202)

tests/vxlan/test_vxlan_ecmp.py

@@ -694,6 +694,14 @@ def dump_self_info_and_run_ptf(self, tcname, encap_type, expect_encap_success, p
                    qlen=1000,
                    log_file="/tmp/vxlan-tests.{}.{}.{}.log".format(tcname, encap_type, datetime.now().strftime('%Y-%m-%d-%H:%M:%S')))
 
+
+@pytest.fixture
+def ignore_route_sync_errlogs(rand_one_dut_hostname, loganalyzer):
+    """Ignore expected failures logs during test execution."""
+    if loganalyzer:
+        loganalyzer[rand_one_dut_hostname].ignore_regex.extend([".*Unaccounted_ROUTE_ENTRY_TABLE_entries.*"])
+    return
+
 class Test_VxLAN_route_tests(Test_VxLAN):
     def test_vxlan_single_endpoint(self, setUp, encap_type):
         '''
@@ -1084,6 +1092,7 @@ def test_vxlan_random_hash(self, setUp, encap_type):
         apply_config_in_swss(self.setup['duthost'], tc11_config, "vnet_route_tc11_"+encap_type)
         self.dump_self_info_and_run_ptf("tc11", encap_type, True, packet_count=1000)
 
+@pytest.mark.usefixtures("ignore_route_sync_errlogs")
 class Test_VxLAN_underlay_ecmp(Test_VxLAN):
     @pytest.mark.parametrize("ecmp_path_count", [1, 2])
     def test_vxlan_modify_underlay_default(self, setUp, minigraph_facts, encap_type, ecmp_path_count):