diff --git a/.azure-pipelines/build-sairedis-template.yml b/.azure-pipelines/build-sairedis-template.yml
index a88922f2b..88546894c 100644
--- a/.azure-pipelines/build-sairedis-template.yml
+++ b/.azure-pipelines/build-sairedis-template.yml
@@ -101,6 +101,8 @@ jobs:
       patterns: |
         target/debs/${{ parameters.debian_version }}/libyang-*_1.0*.deb
         target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
+        target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+        target/debs/${{ parameters.debian_version }}/python3-libyang_*.deb
     displayName: "Download libyang from common lib"
   - script: |
       set -ex
diff --git a/.azure-pipelines/build-swss-template.yml b/.azure-pipelines/build-swss-template.yml
index 306629f10..939f8863e 100644
--- a/.azure-pipelines/build-swss-template.yml
+++ b/.azure-pipelines/build-swss-template.yml
@@ -104,9 +104,13 @@ jobs:
         target/debs/${{ parameters.debian_version }}/libnl-nf*.deb
         target/debs/${{ parameters.debian_version }}/libyang-*_1.0*.deb
         target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
+        target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+        target/debs/${{ parameters.debian_version }}/python3-libyang_*.deb
         target/debs/${{ parameters.debian_version }}/libprotobuf*.deb
         target/debs/${{ parameters.debian_version }}/libprotoc*.deb
         target/debs/${{ parameters.debian_version }}/protobuf-compiler*.deb
+        target/debs/${{ parameters.debian_version }}/libnexthopgroup_*.deb
+        target/debs/${{ parameters.debian_version }}/libnexthopgroup-dev_*.deb
     displayName: "Download common libs"
   - task: DownloadPipelineArtifact@2
     inputs:
diff --git a/.azure-pipelines/build-template.yml b/.azure-pipelines/build-template.yml
index 52a58be1d..825e4ccf8 100644
--- a/.azure-pipelines/build-template.yml
+++ b/.azure-pipelines/build-template.yml
@@ -83,6 +83,9 @@ jobs:
         target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
         target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb
         target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+        target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+        target/debs/${{ parameters.debian_version }}/libyang-dev_3*.deb
+        target/debs/${{ parameters.debian_version }}/python3-libyang_*.deb
     displayName: "Download libyang from ${{ parameters.arch }} common lib"
     condition: ne('${{ parameters.debian_version }}', 'trixie')
   - task: DownloadPipelineArtifact@2
@@ -102,12 +105,50 @@ jobs:
         target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
         target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb
         target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+        target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+        target/debs/${{ parameters.debian_version }}/libyang-dev_3*.deb
+        target/debs/${{ parameters.debian_version }}/python3-libyang_*.deb
         target/debs/${{ parameters.debian_version }}/libpcre*.deb
     displayName: "Download libyang from ${{ parameters.arch }} common lib"
     condition: eq('${{ parameters.debian_version }}', 'trixie')
   - script: |
       set -ex
-      sudo dpkg -i $(find ./download -name *.deb)
+      # Exclude libyang-dev_3*.deb from the dpkg install: it has the same
+      # package name (``libyang-dev``) as the libyang1 libyang-dev that the
+      # C++ compile still needs. We'll instead extract it into a private
+      # sysroot below for the Python binding build.
+      find ./download -name '*.deb' ! -name 'libyang-dev_3*.deb' -print0 \
+        | xargs -0 sudo dpkg -i
+      # The trixie common-lib pin (pipelineId 926659) predates
+      # sonic-net/sonic-buildimage#26584 and doesn't ship
+      # python3-libyang_*.deb. trixie's own apt repo doesn't have a
+      # ``python3-libyang`` package either, so fall back to building the
+      # CESNET libyang Python binding from PyPI sdist. We build against a
+      # local sysroot extracted from libyang3 + libyang-dev_3*.deb because
+      # the libyang1 ``libyang-dev`` we just installed has a clashing
+      # ``libyang.so`` symlink that would otherwise make the linker pick up
+      # the v1 ABI -- which is missing symbols like ``lyplg_ext_parse_log``
+      # that the v3 Python binding needs.
+      if ! python3 -c 'import libyang' 2>/dev/null; then
+        DEBS=./download/target/debs/${{ parameters.debian_version }}
+        LIBYANG3_DEV_DEB=$(ls $DEBS/libyang-dev_3*.deb 2>/dev/null | head -n1 || true)
+        LIBYANG3_DEB=$(ls $DEBS/libyang3_3*.deb 2>/dev/null | head -n1 || true)
+        if [ -n "$LIBYANG3_DEV_DEB" ] && [ -n "$LIBYANG3_DEB" ]; then
+          SYSROOT=/tmp/libyang3-sysroot
+          sudo rm -rf $SYSROOT
+          sudo mkdir -p $SYSROOT
+          sudo dpkg-deb -x $LIBYANG3_DEB $SYSROOT
+          sudo dpkg-deb -x $LIBYANG3_DEV_DEB $SYSROOT
+          sudo apt-get install -y python3-cffi python3-setuptools python3-wheel python3-dev pkg-config dpkg-dev libpcre2-dev || true
+          MULTIARCH=$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null || gcc -print-multiarch)
+          sudo CFLAGS="-I$SYSROOT/usr/include" \
+               LDFLAGS="-L$SYSROOT/usr/lib/$MULTIARCH -Wl,-rpath,/usr/lib/$MULTIARCH" \
+               pip3 install --no-build-isolation 'libyang==3.1.0'
+        else
+          sudo apt-get install -y python3-cffi python3-setuptools python3-wheel python3-dev pkg-config || true
+          sudo pip3 install --no-build-isolation 'libyang==3.1.0'
+        fi
+      fi
     workingDirectory: $(Build.ArtifactStagingDirectory)
     displayName: "Install libyang from common lib"
   - task: DownloadPipelineArtifact@2
diff --git a/.azure-pipelines/test-docker-sonic-vs-template.yml b/.azure-pipelines/test-docker-sonic-vs-template.yml
index 6dc9476b9..5bf3d14c3 100644
--- a/.azure-pipelines/test-docker-sonic-vs-template.yml
+++ b/.azure-pipelines/test-docker-sonic-vs-template.yml
@@ -57,6 +57,8 @@ jobs:
         target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
         target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb
         target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+        target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+        target/debs/${{ parameters.debian_version }}/libyang-dev_3*.deb
     displayName: "Download libyang from common lib"
   - task: DownloadPipelineArtifact@2
     inputs:
@@ -94,10 +96,31 @@ jobs:
       sudo sonic-swss-common/.azure-pipelines/build_and_install_module.sh
 
       # Install libyang packages from downloaded artifacts
-      sudo dpkg -i $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang-*_1.0*.deb \
-                   $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb \
-                   $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb \
-                   $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+      DEBS=$(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}
+      sudo dpkg -i $DEBS/libyang-*_1.0*.deb \
+                   $DEBS/libyang_1.0*.deb \
+                   $DEBS/libyang-cpp_*.deb \
+                   $DEBS/python3-yang_*.deb
+      # libyang3 system library is needed because sonic-yang-mgmt
+      # (sonic-net/sonic-buildimage#26584) was ported from libyang1 to libyang3.
+      sudo dpkg -i $DEBS/libyang3_3*.deb
+      # Build the CESNET libyang Python binding from sdist against a local
+      # sysroot extracted from libyang3 + libyang-dev_3*.deb. We can't dpkg-
+      # install python3-libyang_3*.deb directly (bookworm-built; requires
+      # Python >= 3.11 while this pool may run Python 3.10), nor can we
+      # install libyang-dev_3*.deb system-wide (same package name as the
+      # libyang1 libyang-dev that other components still need; its
+      # `libyang.so` symlink would otherwise mask v1's). PyPI doesn't publish
+      # a binary wheel for libyang, so a from-source build is the only option.
+      SYSROOT=/tmp/libyang3-sysroot
+      sudo rm -rf $SYSROOT
+      sudo mkdir -p $SYSROOT
+      sudo dpkg-deb -x $DEBS/libyang3_3*.deb $SYSROOT
+      sudo dpkg-deb -x $DEBS/libyang-dev_3*.deb $SYSROOT
+      sudo apt-get install -y python3-cffi python3-setuptools python3-wheel python3-dev pkg-config libpcre2-dev
+      sudo CFLAGS="-I$SYSROOT/usr/include" \
+           LDFLAGS="-L$SYSROOT/usr/lib/x86_64-linux-gnu -Wl,-rpath,/usr/lib/x86_64-linux-gnu" \
+           pip3 install --no-build-isolation 'libyang==3.1.0'
 
       sudo dpkg -i $(Build.ArtifactStagingDirectory)/download/libprotobuf*_amd64.deb $(Build.ArtifactStagingDirectory)/download/libprotobuf-lite*_amd64.deb $(Build.ArtifactStagingDirectory)/download/python3-protobuf*_amd64.deb 
       sudo dpkg -i $(Build.ArtifactStagingDirectory)/download/libdashapi*.deb
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index afc94b712..74b08d402 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -146,13 +146,40 @@ stages:
           target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb
           target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb
           target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+          target/debs/${{ parameters.debian_version }}/libyang3_3*.deb
+          target/debs/${{ parameters.debian_version }}/libyang-dev_3*.deb
       displayName: "Download yang deb from amd64 common lib"
     - script: |
         set -ex
-        sudo dpkg -i $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang_1.0*.deb \
-                     $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang-*_1.0*.deb \
-                     $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/libyang-cpp_*.deb \
-                     $(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}/python3-yang_*.deb
+        DEBS=$(Build.ArtifactStagingDirectory)/download/target/debs/${{ parameters.debian_version }}
+        sudo dpkg -i $DEBS/libyang_1.0*.deb \
+                     $DEBS/libyang-*_1.0*.deb \
+                     $DEBS/libyang-cpp_*.deb \
+                     $DEBS/python3-yang_*.deb
+        # libyang3 system library is needed because sonic-yang-mgmt
+        # (sonic-net/sonic-buildimage#26584) was ported from libyang1 to libyang3.
+        sudo dpkg -i $DEBS/libyang3_3*.deb
+        # We can't dpkg-install python3-libyang_3*.deb here: the bookworm-built
+        # deb requires Python >= 3.11, but Microsoft-hosted ubuntu-22.04 ships
+        # Python 3.10. PyPI doesn't publish a binary wheel for libyang either,
+        # so we build the CESNET libyang Python binding from sdist against a
+        # local sysroot extracted from libyang3 + libyang-dev_3*.deb (we can't
+        # install libyang-dev_3*.deb system-wide because it has the same
+        # package name as the libyang1 libyang-dev that our C++ compile still
+        # needs, and its `libyang.so` symlink would otherwise mask v1's).
+        SYSROOT=/tmp/libyang3-sysroot
+        sudo rm -rf $SYSROOT
+        sudo mkdir -p $SYSROOT
+        sudo dpkg-deb -x $DEBS/libyang3_3*.deb $SYSROOT
+        sudo dpkg-deb -x $DEBS/libyang-dev_3*.deb $SYSROOT
+        # Use --no-build-isolation so the sdist's cffi build picks up the
+        # system python3-cffi (1.15) instead of pulling an incompatible
+        # cffi 2.0 into an isolated overlay (where it would mismatch the
+        # system _cffi_backend.so).
+        sudo apt-get install -y python3-cffi python3-setuptools python3-wheel python3-dev pkg-config libpcre2-dev
+        sudo CFLAGS="-I$SYSROOT/usr/include" \
+             LDFLAGS="-L$SYSROOT/usr/lib/x86_64-linux-gnu -Wl,-rpath,/usr/lib/x86_64-linux-gnu" \
+             pip3 install --no-build-isolation 'libyang==3.1.0'
       workingDirectory: $(Build.ArtifactStagingDirectory)
       displayName: "Install yang deb from common lib"
     - task: DownloadPipelineArtifact@2