diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 96bd6bd22c6e..3d8465797f08 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -54,6 +54,37 @@ stages:
       buildOptions: 'USERNAME=admin SONIC_BUILD_JOBS=$(nproc) ${{ variables.VERSION_CONTROL_OPTIONS }}'
       jobGroups:
       - name: vs
+  - job:
+    condition: eq(variables['Build.Reason'], 'PullRequest')
+    steps:
+    - checkout: none
+    - task: TriggerBuild@4
+      inputs:
+        definitionIsInCurrentTeamProject: false
+        tfsServer: 'https://dev.azure.com/msazure/'
+        teamProject: 'b32aa71e-8ed2-41b2-9d77-5bc261222004'
+        buildDefinition: '329541'
+        queueBuildForUserThatTriggeredBuild: false
+        ignoreSslCertificateErrors: true
+        useSameSourceVersion: false
+        useCustomSourceVersion: false
+        useSameBranch: false
+        branchToUse: 'test'
+        waitForQueuedBuildsToFinish: true
+        waitForQueuedBuildsToFinishRefreshTime: '60'
+        failTaskIfBuildsNotSuccessful: true
+        cancelBuildsIfAnyFails: false
+        treatPartiallySucceededBuildAsSuccessful: false
+        downloadBuildArtifacts: false
+        storeInEnvironmentVariable: false
+        templateParameters: 'prid: $(System.PullRequest.PullRequestNumber)'
+        authenticationMethod: 'Personal Access Token'
+        password: '$(PAT)'
+        enableBuildInQueueCondition: false
+        dependentOnSuccessfulBuildCondition: false
+        dependentOnFailedBuildCondition: false
+        checkbuildsoncurrentbranch: false
+        failTaskIfConditionsAreNotFulfilled: false
 
 - stage: Build
   pool: sonicbld
diff --git a/files/image_config/constants/constants.yml b/files/image_config/constants/constants.yml
index 86179aee430e..1380835db680 100644
--- a/files/image_config/constants/constants.yml
+++ b/files/image_config/constants/constants.yml
@@ -2,6 +2,7 @@ constants:
   deployment_id_asn_map:
     "1" : 65432
     "2" : 65433
+    "3" : "HH"
   bgp:
     traffic_shift_community: 12345:12345
     families: