diff --git a/.azure-pipelines/azure-pipelines-Official.yml b/.azure-pipelines/azure-pipelines-Official.yml
index 56d88751f6..3a5f59dda8 100644
--- a/.azure-pipelines/azure-pipelines-Official.yml
+++ b/.azure-pipelines/azure-pipelines-Official.yml
@@ -14,7 +14,7 @@ schedules:
     - 202012
   always: true
 
-pool: sonicbld-1es
+pool: sonicso1ES-amd64
 
 stages:
 - stage: Build
diff --git a/.azure-pipelines/azure-pipelines-UpgrateVersion.yml b/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
index b26f501cf2..3fd8b1dac2 100644
--- a/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
+++ b/.azure-pipelines/azure-pipelines-UpgrateVersion.yml
@@ -26,7 +26,7 @@ resources:
     ref: master
     endpoint: sonic-net
 
-pool: sonicbld-1es
+pool: sonicso1ES-amd64
 
 parameters:
 - name: 'jobFilters'
diff --git a/.azure-pipelines/azure-pipelines-build.yml b/.azure-pipelines/azure-pipelines-build.yml
index 5781951307..c54068533b 100644
--- a/.azure-pipelines/azure-pipelines-build.yml
+++ b/.azure-pipelines/azure-pipelines-build.yml
@@ -73,7 +73,7 @@ jobs:
 
         - name: centec-arm64
           ${{ if not(parameters.qemuOrCrossBuild) }}:
-            pool: sonicbld-arm64
+            pool: sonicso1ES-arm64
           timeoutInMinutes: 2880
           variables:
             PLATFORM_ARCH: arm64
@@ -88,7 +88,7 @@ jobs:
 
         - name: marvell-armhf
           ${{ if not(parameters.qemuOrCrossBuild) }}:
-            pool: sonicbld-armhf
+            pool: sonicso1ES-armhf
           timeoutInMinutes: 2880
           variables:
             PLATFORM_NAME: marvell
@@ -96,7 +96,7 @@ jobs:
 
         - name: marvell-arm64
           ${{ if not(parameters.qemuOrCrossBuild) }}:
-            pool: sonicbld-arm64
+            pool: sonicso1ES-arm64
           timeoutInMinutes: 2880
           variables:
             PLATFORM_NAME: marvell
@@ -119,12 +119,12 @@ jobs:
             platform_rpc: nephos
 
         - name: pensando
-          pool: sonicbld-arm64
+          pool: sonicso1ES-arm64
           variables:
             PLATFORM_ARCH: arm64
 
         - name: nvidia-bluefield
-          pool: sonicbld-arm64
+          pool: sonicso1ES-arm64
           variables:
             PLATFORM_ARCH: arm64
 
diff --git a/.azure-pipelines/build-template.yml b/.azure-pipelines/build-template.yml
index 813126792e..85d660f586 100644
--- a/.azure-pipelines/build-template.yml
+++ b/.azure-pipelines/build-template.yml
@@ -35,9 +35,8 @@ parameters:
 - name: pool
   type: string
   values:
-  - sonicbld-1es
-  - sonicbld_8c
-  default: sonicbld-1es
+  - sonicso1ES-amd64
+  default: sonicso1ES-amd64
 
 - name: dbg_image
   type: boolean
diff --git a/.azure-pipelines/docker-sonic-mgmt-py3-only.yml b/.azure-pipelines/docker-sonic-mgmt-py3-only.yml
index 8019e957fd..af913b300c 100644
--- a/.azure-pipelines/docker-sonic-mgmt-py3-only.yml
+++ b/.azure-pipelines/docker-sonic-mgmt-py3-only.yml
@@ -32,7 +32,7 @@ stages:
 - stage: Build
   jobs:
   - job: Build
-    pool: sonicbld-1es
+    pool: sonicso1ES-amd64
     timeoutInMinutes: 360
     steps:
     - template: cleanup.yml
diff --git a/.azure-pipelines/docker-sonic-mgmt.yml b/.azure-pipelines/docker-sonic-mgmt.yml
index 924e4230df..56c4034888 100644
--- a/.azure-pipelines/docker-sonic-mgmt.yml
+++ b/.azure-pipelines/docker-sonic-mgmt.yml
@@ -32,7 +32,7 @@ stages:
 - stage: Build
   jobs:
   - job: Build
-    pool: sonicbld-1es
+    pool: sonicso1ES-amd64
     timeoutInMinutes: 360
     steps:
     - template: cleanup.yml
diff --git a/.azure-pipelines/docker-sonic-slave-template.yml b/.azure-pipelines/docker-sonic-slave-template.yml
index 8bf7540e18..f47f5cddd9 100644
--- a/.azure-pipelines/docker-sonic-slave-template.yml
+++ b/.azure-pipelines/docker-sonic-slave-template.yml
@@ -29,11 +29,11 @@ parameters:
   default: sonicdev
 - name: pool
   type: string
-  default: sonicbld-1es
+  default: sonicso1ES-amd64
   values:
-  - sonicbld-1es
-  - sonicbld-arm64
-  - sonicbld-armhf
+  - sonicso1ES-amd64
+  - sonicso1ES-arm64
+  - sonicso1ES-armhf
 
 jobs:
 - job: sonic_slave_${{ parameters.dist }}${{ parameters.march }}
diff --git a/.azure-pipelines/docker-sonic-slave.yml b/.azure-pipelines/docker-sonic-slave.yml
index 6b4da92c69..58f3488a1a 100644
--- a/.azure-pipelines/docker-sonic-slave.yml
+++ b/.azure-pipelines/docker-sonic-slave.yml
@@ -62,7 +62,7 @@ stages:
     - ${{ if endswith(variables['Build.DefinitionName'], dist) }}:
       - template: .azure-pipelines/docker-sonic-slave-template.yml@buildimage
         parameters:
-          pool: sonicbld-1es
+          pool: sonicso1ES-amd64
           arch: amd64
           dist: ${{ dist }}
 - stage: Build_native_arm
@@ -74,7 +74,7 @@ stages:
         - ${{ if ne(arch, 'amd64') }}:
           - template: .azure-pipelines/docker-sonic-slave-template.yml@buildimage
             parameters:
-              pool: sonicbld-${{ arch }}
+              pool: sonicso1ES-${{ arch }}
               arch: ${{ arch }}
               dist: ${{ dist }}
               march: _${{ arch }}
diff --git a/.azure-pipelines/dpkg-cache-cleanup.yml b/.azure-pipelines/dpkg-cache-cleanup.yml
index 7bac6997e4..ab1b7fa52a 100644
--- a/.azure-pipelines/dpkg-cache-cleanup.yml
+++ b/.azure-pipelines/dpkg-cache-cleanup.yml
@@ -16,7 +16,7 @@ pr: none
 
 jobs:
 - job: Amd
-  pool: sonicbld-1es
+  pool: sonicso1ES-amd64
   timeoutInMinutes: 5
   steps:
   - checkout: none
@@ -26,7 +26,7 @@ jobs:
       df -h
     displayName: clean dpkg cache
 - job: Armhf
-  pool: sonicbld-armhf
+  pool: sonicso1ES-armhf
   timeoutInMinutes: 5
   steps:
   - checkout: none
@@ -36,7 +36,7 @@ jobs:
       df -h
     displayName: clean dpkg cache
 - job: Arm64
-  pool: sonicbld-arm64
+  pool: sonicso1ES-arm64
   timeoutInMinutes: 5
   steps:
   - checkout: none
diff --git a/.azure-pipelines/official-build-cache.yml b/.azure-pipelines/official-build-cache.yml
index 0f7b34e9bd..07b759a5f6 100644
--- a/.azure-pipelines/official-build-cache.yml
+++ b/.azure-pipelines/official-build-cache.yml
@@ -24,7 +24,7 @@ pr: none
 
 stages:
 - stage: Build
-  pool: sonicbld-1es
+  pool: sonicso1ES-amd64
   variables:
   - name: CACHE_MODE
     value: cache
@@ -46,7 +46,7 @@ stages:
             docker_syncd_rpc_image: yes
             platform_rpc: mlnx
         - name: marvell-armhf
-          pool: sonicbld-armhf
+          pool: sonicso1ES-armhf
           timeoutInMinutes: 1200
           variables:
             PLATFORM_NAME: marvell
diff --git a/.azure-pipelines/official-build-vs-with-test.yml b/.azure-pipelines/official-build-vs-with-test.yml
index 7325efbc7e..1f35ba3086 100644
--- a/.azure-pipelines/official-build-vs-with-test.yml
+++ b/.azure-pipelines/official-build-vs-with-test.yml
@@ -51,7 +51,7 @@ variables:
 
 stages:
   - stage: BuildVS
-    pool: sonicbld-1es
+    pool: sonicso1ES-amd64
     jobs:
       - template: azure-pipelines-build.yml
         parameters:
diff --git a/.azure-pipelines/official-build.yml b/.azure-pipelines/official-build.yml
index a228529b4a..86aef8fc09 100644
--- a/.azure-pipelines/official-build.yml
+++ b/.azure-pipelines/official-build.yml
@@ -34,7 +34,7 @@ variables:
 
 stages:
 - stage: Build
-  pool: sonicbld-1es
+  pool: sonicso1ES-amd64
   variables:
   - group: Container-Registry
   - name: CACHE_MODE
diff --git a/.azure-pipelines/template-commonlib.yml b/.azure-pipelines/template-commonlib.yml
index 85b97398d3..4b99e01611 100644
--- a/.azure-pipelines/template-commonlib.yml
+++ b/.azure-pipelines/template-commonlib.yml
@@ -9,9 +9,9 @@ jobs:
   - job: Build_${{ arch }}
     timeoutInMinutes: 120
     ${{ if eq(arch,'amd64') }}:
-      pool: sonicbld-1es
+      pool: sonicso1ES-amd64
     ${{ else }}:
-      pool: sonicbld-${{ arch }}
+      pool: sonicso1ES-${{ arch }}
     variables:
       - template: template-variables.yml
     steps:
diff --git a/Makefile.work b/Makefile.work
index fe14eebaed..23a3e272fe 100644
--- a/Makefile.work
+++ b/Makefile.work
@@ -94,7 +94,7 @@ $(error Add your user account to docker group and use your user account to make.
 endif
 
 # Check for j2cli availability
-J2_VER := $(shell j2 --version 2>&1 | grep j2cli | awk '{printf $$2}')
+J2_VER := $(shell j2 --version 2>&1 | grep j2 | awk '{printf $$2}')
 ifeq ($(J2_VER),)
 $(error Please install j2cli (sudo pip install j2cli))
 endif
@@ -310,6 +310,7 @@ DOCKER_RUN := docker run --rm=true --privileged --init \
     -e "https_proxy=$(https_proxy)" \
     -e "no_proxy=$(no_proxy)" \
     -i$(shell { if [ -t 0 ]; then echo t; fi }) \
+    --ulimit nofile=524288:524288 \
     $(SONIC_BUILDER_EXTRA_CMDLINE)
 
 # Mount the $(DOCKER_ROOT) to /var/lib/docker in the slave container, the overlay fs is not supported as dockerd root folder.
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index adc2f284b0..dbed20485d 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -51,7 +51,7 @@ variables:
 
 stages:
 - stage: BuildVS
-  pool: sonicbld-1es
+  pool: sonicso1ES-amd64
   jobs:
   - template: .azure-pipelines/azure-pipelines-build.yml
     parameters:
@@ -60,7 +60,7 @@ stages:
       - name: vs
 
 - stage: Build
-  pool: sonicbld-1es
+  pool: sonicso1ES-amd64
   dependsOn: []
   jobs:
   - template: .azure-pipelines/azure-pipelines-build.yml
@@ -79,12 +79,12 @@ stages:
           docker_syncd_rpc_image: yes
           platform_rpc: mlnx
       - name: marvell-arm64
-        pool: sonicbld-arm64
+        pool: sonicso1ES-arm64
         variables:
            PLATFORM_NAME: marvell
            PLATFORM_ARCH: arm64
       - name: marvell-armhf
-        pool: sonicbld-armhf
+        pool: sonicso1ES-armhf
         timeoutInMinutes: 1200
         variables:
           PLATFORM_NAME: marvell
diff --git a/dockers/docker-base-bullseye/Dockerfile.j2 b/dockers/docker-base-bullseye/Dockerfile.j2
index 0ec093c901..4bf0a1687f 100644
--- a/dockers/docker-base-bullseye/Dockerfile.j2
+++ b/dockers/docker-base-bullseye/Dockerfile.j2
@@ -62,7 +62,7 @@ RUN apt-get update &&        \
 
 # default rsyslog version is 8.2110.0 which has a bug on log rate limit,
 # use backport version 8.2206.0-1~bpo11+1
-RUN apt-get -t bullseye-backports -y install rsyslog
+RUN apt-get -y install rsyslog
 
 # Upgrade pip via PyPI and uninstall the Debian version
 RUN pip3 install --upgrade pip
diff --git a/files/build/versions/default/versions-mirror b/files/build/versions/default/versions-mirror
index 2153472776..5085c10ee7 100644
--- a/files/build/versions/default/versions-mirror
+++ b/files/build/versions/default/versions-mirror
@@ -4,21 +4,21 @@ archive.ubuntu.com_ubuntu_dists_focal-updates==2025-03-09T01:25:39Z
 deb.nodesource.com_node%5f14.x_dists_bookworm==2023-02-17T00:35:29Z
 deb.nodesource.com_node%5f14.x_dists_bullseye==2023-02-17T00:35:28Z
 deb.nodesource.com_node%5f14.x_dists_buster==2023-02-17T00:35:28Z
-debian==20250308T000907Z
-debian-security==20250308T000950Z
+debian==20251014T002409Z
+debian-security==20251014T002334Z
 download.docker.com_linux_debian_dists_bookworm==2025-03-03T10:37:36Z
 download.docker.com_linux_debian_dists_bullseye==2025-02-26T13:28:50Z
 download.docker.com_linux_debian_dists_buster==2024-06-17T16:53:50Z
-packages.trafficmanager.net_snapshot_debian-security_20250308T000950Z_dists_bookworm-security==2025-03-07T00:14:51Z
-packages.trafficmanager.net_snapshot_debian-security_20250308T000950Z_dists_bullseye-security==2025-03-07T00:14:51Z
-packages.trafficmanager.net_snapshot_debian-security_20250308T000950Z_dists_buster_updates==2024-12-29T19:56:34Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bookworm==2025-01-11T10:25:55Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bookworm-backports==2025-03-07T20:25:41Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bookworm-updates==2025-03-07T20:25:41Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bullseye==2024-08-31T11:02:15Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bullseye-backports==2025-03-07T20:25:41Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_bullseye-updates==2025-03-07T20:25:41Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_buster==2023-06-10T08:53:33Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_buster-backports==2024-03-09T20:54:54Z
-packages.trafficmanager.net_snapshot_debian_20250308T000907Z_dists_buster-updates==2023-06-10T08:55:10Z
+packages.trafficmanager.net_snapshot_debian-security_20251014T002334Z_dists_bookworm-security==2025-03-07T00:14:51Z
+packages.trafficmanager.net_snapshot_debian-security_20251014T002334Z_dists_bullseye-security==2025-03-07T00:14:51Z
+packages.trafficmanager.net_snapshot_debian-security_20251014T002334Z_dists_buster_updates==2024-12-29T19:56:34Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bookworm==2025-01-11T10:25:55Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bookworm-backports==2025-03-07T20:25:41Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bookworm-updates==2025-03-07T20:25:41Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bullseye==2024-08-31T11:02:15Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bullseye-backports==2025-03-07T20:25:41Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_bullseye-updates==2025-03-07T20:25:41Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_buster==2023-06-10T08:53:33Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_buster-backports==2024-03-09T20:54:54Z
+packages.trafficmanager.net_snapshot_debian_20251014T002409Z_dists_buster-updates==2023-06-10T08:55:10Z
 security.ubuntu.com_ubuntu_dists_focal-security==2025-03-08T21:44:06Z