diff --git a/.azure-pipelines/run-test-elastictest-template.yml b/.azure-pipelines/run-test-elastictest-template.yml
index afe86994db4..00d9a474ad6 100644
--- a/.azure-pipelines/run-test-elastictest-template.yml
+++ b/.azure-pipelines/run-test-elastictest-template.yml
@@ -122,10 +122,18 @@ parameters:
     type: string
     default: ""
 
+  # Enable parallel run for test cases that support parallel run
   - name: ENABLE_PARALLEL_RUN
     type: string
     default: ""
 
+  # Specify the file that contains the parallel mode for test cases that need to run in parallel when
+  # ENABLE_PARALLEL_RUN is set to True. Default value is the test_parallel_modes/default.json file in this repo.
+  # This field will be ignored if ENABLE_PARALLEL_RUN is set to False.
+  - name: PARALLEL_MODES_FILE
+    type: string
+    default: ""
+
   # The number of retries when the script fails. Global retry if retry_cases_include and retry_cases_exclude are both empty, otherwise specific retry
   - name: RETRY_TIMES
     type: string
@@ -264,6 +272,8 @@ steps:
       --repo-name ${{ parameters.REPO_NAME }} \
       --mgmt-branch ${{ parameters.MGMT_BRANCH }} \
       --stop-on-failure ${{ parameters.STOP_ON_FAILURE }} \
+      --enable-parallel-run ${{ parameters.ENABLE_PARALLEL_RUN }} \
+      --parallel-modes-file ${{ parameters.PARALLEL_MODES_FILE }} \
       --retry-times ${{ parameters.RETRY_TIMES }} \
       --requester "${{ parameters.REQUESTER }}" \
       --max-execute-seconds $((${{ parameters.MAX_RUN_TEST_MINUTES }} * 60)) \
diff --git a/.azure-pipelines/test_plan.py b/.azure-pipelines/test_plan.py
index 93eb42efcb1..84e0cd33efd 100644
--- a/.azure-pipelines/test_plan.py
+++ b/.azure-pipelines/test_plan.py
@@ -307,6 +307,7 @@ def create(self, topology, test_plan_name="my_test_plan", deploy_mg_extra_params
             "test_option": {
                 "stop_on_failure": kwargs.get("stop_on_failure", True),
                 "enable_parallel_run": kwargs.get("enable_parallel_run", False),
+                "parallel_modes_file": kwargs.get("parallel_modes_file", "default.json"),
                 "retry_times": kwargs.get("retry_times", 2),
                 "retry_cases_include": retry_cases_include,
                 "retry_cases_exclude": retry_cases_exclude,
@@ -831,6 +832,16 @@ def poll(self, test_plan_id, interval=60, timeout=-1, expected_state="", expecte
         choices=[True, False],
         help="Enable parallel run or not."
     )
+    parser_create.add_argument(
+        "--parallel-modes-file",
+        type=str,
+        dest="parallel_modes_file",
+        nargs='?',
+        const='default.json',
+        default='default.json',
+        required=False,
+        help="Which parallel modes file to use when parallel run is enabled."
+    )
     parser_create.add_argument(
         "--retry-times",
         type=int,
@@ -1034,6 +1045,7 @@ def poll(self, test_plan_id, interval=60, timeout=-1, expected_state="", expecte
                     platform=args.platform,
                     stop_on_failure=args.stop_on_failure,
                     enable_parallel_run=args.enable_parallel_run,
+                    parallel_modes_file=args.parallel_modes_file,
                     retry_times=args.retry_times,
                     retry_cases_include=args.retry_cases_include,
                     retry_cases_exclude=args.retry_cases_exclude,
diff --git a/tests/test_parallel_modes/cisco_t2_8800.json b/tests/test_parallel_modes/cisco_t2_8800.json
new file mode 100644
index 00000000000..6d443f8c631
--- /dev/null
+++ b/tests/test_parallel_modes/cisco_t2_8800.json
@@ -0,0 +1,31 @@
+{
+    "arp/test_neighbor_mac_noptf.py": "FULL_PARALLEL",
+    "autorestart/test_container_autorestart.py": "RP_FIRST",
+    "bgp/test_bgp_fact.py": "FULL_PARALLEL",
+    "bgp/test_bgp_session_flap.py": "FULL_PARALLEL",
+    "container_checker/test_container_checker.py": "RP_FIRST",
+    "crm/test_crm.py": "FULL_PARALLEL",
+    "iface_namingmode/test_iface_namingmode.py": "FULL_PARALLEL",
+    "lldp/test_lldp.py": "FULL_PARALLEL",
+    "memory_checker/test_memory_checker.py": "FULL_PARALLEL",
+    "override_config_table/test_override_config_table_masic.py": "FULL_PARALLEL",
+    "passw_hardening/test_passw_hardening.py": "FULL_PARALLEL",
+    "pc/test_po_cleanup.py": "FULL_PARALLEL",
+    "platform_tests/api/test_chassis.py": "FULL_PARALLEL",
+    "platform_tests/api/test_module.py": "FULL_PARALLEL",
+    "platform_tests/api/test_sfp.py": "FULL_PARALLEL",
+    "platform_tests/api/test_thermal.py": "FULL_PARALLEL",
+    "platform_tests/cli/test_show_chassis_module.py": "FULL_PARALLEL",
+    "platform_tests/link_flap/test_cont_link_flap.py": "FULL_PARALLEL",
+    "platform_tests/sfp/test_sfputil.py": "FULL_PARALLEL",
+    "platform_tests/test_memory_exhaustion.py": "RP_FIRST",
+    "platform_tests/test_reboot.py": "RP_FIRST",
+    "platform_tests/test_reload_config.py": "RP_FIRST",
+    "platform_tests/test_sequential_restart.py": "FULL_PARALLEL",
+    "show_techsupport/test_techsupport.py": "FULL_PARALLEL",
+    "show_techsupport/test_techsupport_no_secret.py": "FULL_PARALLEL",
+    "snmp/test_snmp_cpu.py": "FULL_PARALLEL",
+    "snmp/test_snmp_interfaces.py": "FULL_PARALLEL",
+    "snmp/test_snmp_link_local.py": "FULL_PARALLEL",
+    "snmp/test_snmp_queue.py": "RP_FIRST"
+}
diff --git a/tests/test_parallel_modes/default.json b/tests/test_parallel_modes/default.json
new file mode 100644
index 00000000000..e82a6fb6a77
--- /dev/null
+++ b/tests/test_parallel_modes/default.json
@@ -0,0 +1,5 @@
+{
+    "bgp/test_bgp_fact.py": "FULL_PARALLEL",
+    "lldp/test_lldp.py": "FULL_PARALLEL",
+    "snmp/test_snmp_interfaces.py": "FULL_PARALLEL"
+}