diff --git a/hooks/playbooks/adoption_dcn_export.yml b/hooks/playbooks/adoption_dcn_export.yml
new file mode 100644
index 0000000000..ec104b8f81
--- /dev/null
+++ b/hooks/playbooks/adoption_dcn_export.yml
@@ -0,0 +1,60 @@
+---
+# Copyright Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# This playbook exports a TripleO stack for use by DCN stacks.
+# It creates the <stack_name>-export.yaml file that contains
+# the parameters DCN stacks need to connect to the central site.
+
+- name: Export TripleO stack for DCN
+  hosts: "{{ cifmw_target_host | default('localhost') }}"
+  gather_facts: false
+  vars:
+    _stack_name: "{{ stack_name | default('central') }}"
+    _ansible_user_dir: "{{ ansible_user_dir | default('/home/zuul') }}"
+  tasks:
+    - name: Gather ansible_user_dir from undercloud
+      delegate_to: "osp-undercloud-0"
+      ansible.builtin.setup:
+        gather_subset:
+          - user_dir
+
+    - name: Export stack for DCN usage
+      delegate_to: "osp-undercloud-0"
+      vars:
+        _export_cmd: >-
+          source {{ ansible_user_dir }}/stackrc;
+          openstack overcloud export
+          --stack {{ _stack_name }}
+          --force-overwrite
+          --output-file {{ ansible_user_dir }}/overcloud-deploy/{{ _stack_name }}/{{ _stack_name }}-export.yaml
+      cifmw.general.ci_script:
+        chdir: "{{ ansible_user_dir }}"
+        output_dir: "{{ ansible_user_dir }}/ci-framework-data/artifacts"
+        script: "{{ _export_cmd }}"
+
+    - name: Export Ceph configuration for DCN usage
+      delegate_to: "osp-undercloud-0"
+      vars:
+        _export_ceph_cmd: >-
+          source {{ ansible_user_dir }}/stackrc;
+          openstack overcloud export ceph
+          --stack {{ _stack_name }}
+          --force-overwrite
+          --output-file {{ ansible_user_dir }}/{{ _stack_name }}_ceph_external.yaml
+      cifmw.general.ci_script:
+        chdir: "{{ ansible_user_dir }}"
+        output_dir: "{{ ansible_user_dir }}/ci-framework-data/artifacts"
+        script: "{{ _export_ceph_cmd }}"
diff --git a/hooks/playbooks/adoption_dcn_update_central.yml b/hooks/playbooks/adoption_dcn_update_central.yml
new file mode 100644
index 0000000000..60fc047574
--- /dev/null
+++ b/hooks/playbooks/adoption_dcn_update_central.yml
@@ -0,0 +1,221 @@
+---
+# Copyright Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# This playbook updates the central site after all DCN sites are deployed.
+# 1. Copy Ceph keys and configuration from DCN sites to central controllers
+# 2. Configure Glance with DCN Ceph stores
+# 3. Restart Glance to apply the new configuration
+
+- name: Update central site with DCN Ceph stores
+  hosts: "{{ cifmw_target_host | default('localhost') }}"
+  gather_facts: false
+  vars:
+    _dcn_stack_names: "{{ dcn_stack_names | default('dcn1,dcn2') }}"
+    _glance_config_file: "/var/lib/config-data/puppet-generated/glance_api/etc/glance/glance-api.conf"
+  tasks:
+    - name: Build list of DCN sites from scenario
+      vars:
+        _dcn_name: "{{ item }}"
+        _dcn_stack: >-
+          {{ cifmw_adoption_osp_deploy_scenario.stacks |
+             selectattr('stackname', 'equalto', _dcn_name) |
+             first }}
+        _dcn_group: "{{ _dcn_stack.stack_nodes | first }}"
+        _dcn_node: "{{ _vm_groups[_dcn_group] | first }}"
+      ansible.builtin.set_fact:
+        _dcn_sites: >-
+          {{ _dcn_sites | default([]) + [{'name': _dcn_name, 'ceph_node': _dcn_node}] }}
+      loop: "{{ _dcn_stack_names.split(',') }}"
+
+    - name: Get list of controller nodes
+      vars:
+        _central_stack: >-
+          {{ cifmw_adoption_osp_deploy_scenario.stacks |
+             selectattr('stackname', 'equalto', central_stack_name | default('central')) |
+             first }}
+        _controller_group: >-
+          {{ _central_stack.stack_nodes |
+             select('search', 'controller') |
+             first | default('osp-controllers') }}
+      ansible.builtin.set_fact:
+        _controller_nodes: "{{ _vm_groups[_controller_group] | default([]) }}"
+
+    - name: Display discovered nodes
+      ansible.builtin.debug:
+        msg:
+          - "DCN sites: {{ _dcn_sites }}"
+          - "Controller nodes: {{ _controller_nodes }}"
+
+    - name: Build Glance DCN store configuration
+      ansible.builtin.set_fact:
+        _glance_dcn_config: |
+          {% for site in _dcn_sites %}
+          [{{ site.name }}]
+          rbd_store_ceph_conf=/etc/ceph/{{ site.name }}.conf
+          rbd_store_user=openstack
+          rbd_store_pool=images
+          rbd_thin_provisioning=False
+          store_description={{ site.name }} rbd glance store
+          {% endfor %}
+
+    - name: Copy Ceph files from DCN sites to controllers
+      block:
+        - name: Ensure ceph config directory exists on controllers
+          delegate_to: "{{ item }}"
+          become: true
+          ansible.builtin.file:
+            path: "/var/lib/tripleo-config/ceph"
+            state: directory
+            owner: root
+            group: root
+            mode: "0755"
+          loop: "{{ _controller_nodes }}"
+
+        - name: Fetch Ceph config from DCN site
+          delegate_to: "{{ item.ceph_node }}"
+          become: true
+          ansible.builtin.fetch:
+            src: "/var/lib/tripleo-config/ceph/{{ item.name }}.conf"
+            dest: "/tmp/ceph_files/{{ item.name }}.conf"
+            flat: true
+          loop: "{{ _dcn_sites }}"
+          loop_control:
+            label: "{{ item.name }}"
+
+        - name: Fetch Ceph keyring from DCN site
+          delegate_to: "{{ item.ceph_node }}"
+          become: true
+          ansible.builtin.fetch:
+            src: "/var/lib/tripleo-config/ceph/{{ item.name }}.client.openstack.keyring"
+            dest: "/tmp/ceph_files/{{ item.name }}.client.openstack.keyring"
+            flat: true
+          loop: "{{ _dcn_sites }}"
+          loop_control:
+            label: "{{ item.name }}"
+
+        - name: Copy Ceph config to controllers
+          delegate_to: "{{ item.1 }}"
+          become: true
+          ansible.builtin.copy:
+            src: "/tmp/ceph_files/{{ item.0.name }}.conf"
+            dest: "/var/lib/tripleo-config/ceph/{{ item.0.name }}.conf"
+            owner: root
+            group: root
+            mode: "0644"
+          loop: "{{ _dcn_sites | product(_controller_nodes) | list }}"
+          loop_control:
+            label: "{{ item.0.name }} -> {{ item.1 }}"
+
+        - name: Copy Ceph keyring to controllers
+          delegate_to: "{{ item.1 }}"
+          become: true
+          ansible.builtin.copy:
+            src: "/tmp/ceph_files/{{ item.0.name }}.client.openstack.keyring"
+            dest: "/var/lib/tripleo-config/ceph/{{ item.0.name }}.client.openstack.keyring"
+            owner: root
+            group: root
+            mode: "0644"
+          loop: "{{ _dcn_sites | product(_controller_nodes) | list }}"
+          loop_control:
+            label: "{{ item.0.name }} -> {{ item.1 }}"
+
+    - name: Configure Glance with DCN stores
+      block:
+        - name: Check glance config status on each controller
+          delegate_to: "{{ controller }}"
+          become: true
+          ansible.builtin.stat:
+            path: "{{ _glance_config_file }}"
+          register: _glance_status
+          loop: "{{ _controller_nodes }}"
+          loop_control:
+            loop_var: controller
+
+        - name: Build list of controllers needing Glance update
+          ansible.builtin.set_fact:
+            _controllers_to_update: >-
+              {{ _glance_status.results |
+                 selectattr('stat.exists') |
+                 map(attribute='controller') |
+                 list }}
+
+        - name: Display controllers to update
+          ansible.builtin.debug:
+            msg: "Controllers needing Glance update: {{ _controllers_to_update }}"
+
+        - name: Get current enabled_backends value
+          delegate_to: "{{ controller }}"
+          become: true
+          ansible.builtin.command:
+            cmd: awk -F'\s*=\s*' '/^enabled_backends\s*=/{print $2; exit}' "{{ _glance_config_file }}"
+          register: _current_backends
+          changed_when: false
+          loop: "{{ _controllers_to_update }}"
+          loop_control:
+            loop_var: controller
+
+        - name: Build DCN backends string
+          ansible.builtin.set_fact:
+            _dcn_backends_suffix: >-
+              {{ _dcn_sites | map(attribute='name') | map('regex_replace', '^(.*)$', ',\1:rbd') | join('') }}
+
+        - name: Update enabled_backends to include DCN stores
+          delegate_to: "{{ item.controller }}"
+          become: true
+          ansible.builtin.lineinfile:
+            path: "{{ _glance_config_file }}"
+            regexp: '^enabled_backends\s*='
+            line: "enabled_backends={{ item.stdout }}{{ _dcn_backends_suffix }}"
+            backrefs: false
+          loop: "{{ _current_backends.results }}"
+          loop_control:
+            label: "{{ item.controller }}"
+          when: _dcn_sites[0].name ~ ':rbd' not in item.stdout
+
+        - name: Enable copy-image import method for multistore
+          delegate_to: "{{ controller }}"
+          become: true
+          ansible.builtin.lineinfile:
+            path: "{{ _glance_config_file }}"
+            regexp: '^enabled_import_methods\s*='
+            line: 'enabled_import_methods=["web-download","copy-image"]'
+            insertafter: '^\[DEFAULT\]'
+          loop: "{{ _controllers_to_update }}"
+          loop_control:
+            loop_var: controller
+
+        - name: Add DCN store configuration to glance-api.conf
+          delegate_to: "{{ controller }}"
+          become: true
+          ansible.builtin.blockinfile:
+            path: "{{ _glance_config_file }}"
+            block: "{{ _glance_dcn_config }}"
+            insertafter: EOF
+          loop: "{{ _controllers_to_update }}"
+          loop_control:
+            loop_var: controller
+          register: _glance_config_changed
+
+    - name: Restart Glance API service on updated controllers
+      delegate_to: "{{ controller }}"
+      become: true
+      ansible.builtin.systemd:
+        name: tripleo_glance_api.service
+        state: restarted
+      loop: "{{ _controllers_to_update }}"
+      loop_control:
+        loop_var: controller
+      when: _controllers_to_update | length > 0
diff --git a/hooks/playbooks/adoption_deploy_ceph.yml b/hooks/playbooks/adoption_deploy_ceph.yml
index 35dc7eb2c7..2e5b9f0870 100644
--- a/hooks/playbooks/adoption_deploy_ceph.yml
+++ b/hooks/playbooks/adoption_deploy_ceph.yml
@@ -72,6 +72,10 @@
           }}
         _cloud_domain: "{{ cifmw_adoption_osp_deploy_scenario.cloud_domain }}"
         _source_cmd: "source {{ ansible_user_dir }}/stackrc"
+        # Use stack-specific filename for non-default stack names to avoid overwrites
+        # Default 'overcloud' stack uses 'deployed_ceph.yaml' for backward compatibility
+        _deployed_ceph_suffix: "{{ '' if _overcloud_name == 'overcloud' else '_' ~ _overcloud_name }}"
+        _deployed_ceph_file: "{{ ansible_user_dir }}/deployed_ceph{{ _deployed_ceph_suffix }}.yaml"
       block:
         - name: Copy ceph osd file
           delegate_to: "osp-undercloud-0"
@@ -99,6 +103,7 @@
             _ceph_spec_cmd: >-
               openstack overcloud ceph spec
               {{ ansible_user_dir }}/config_download_{{ _overcloud_name }}.yaml
+              --stack {{ _overcloud_name }}
               --tld {{ _cloud_domain }}
               --osd-spec {{ _ceph_osd_spec_file_dest }}
               --roles-data {{ _roles_file_dest }}
@@ -111,7 +116,7 @@
         - name: Ensure deployed_ceph file does not exist
           delegate_to: "osp-undercloud-0"
           ansible.builtin.file:
-            path: "{{ ansible_user_dir }}/deployed_ceph.yaml"
+            path: "{{ _deployed_ceph_file }}"
             state: absent
 
         - name: Gather nodes for stack {{ _overcloud_name }}
@@ -159,14 +164,18 @@
         - name: Deploy ceph
           delegate_to: "osp-undercloud-0"
           vars:
+            # Only pass --cluster for non-default stacks to set unique cluster names
+            # Default 'overcloud' stack uses 'ceph' cluster name for backward compatibility
             _ceph_deploy_cmd: >-
               openstack overcloud ceph deploy
+              --stack {{ _overcloud_name }}
+              {%- if _overcloud_name != 'overcloud' %} --cluster {{ _overcloud_name }}{% endif %}
               --tld {{ _cloud_domain }}
               --ntp-server {{ cifmw_adoption_osp_deploy_ntp_server }}
               --ceph-spec ceph_spec.yaml
               --network-data {{ _network_data_file_dest }}
               --container-image-prepare {{ ansible_user_dir }}/containers-prepare-parameters.yaml
-              --output {{ ansible_user_dir }}/deployed_ceph.yaml
+              --output {{ _deployed_ceph_file }}
           cifmw.general.ci_script:
             chdir: "{{ ansible_user_dir }}"
             output_dir: "{{ _cifmw_basedir_undercloud }}/artifacts"
diff --git a/roles/adoption_osp_deploy/tasks/prepare_overcloud.yml b/roles/adoption_osp_deploy/tasks/prepare_overcloud.yml
index 83a01bf1df..9774e3b7e3 100644
--- a/roles/adoption_osp_deploy/tasks/prepare_overcloud.yml
+++ b/roles/adoption_osp_deploy/tasks/prepare_overcloud.yml
@@ -254,8 +254,8 @@
       delegate_to: "{{ overcloud_vm }}"
       vars:
         _node_net: "{{ cifmw_networking_env_definition.instances[overcloud_vm] }}"
-        _ctlplane_node_net: "{{ _node_net.networks.ctlplane | default({}) }}"
-        _ctlplane_net: "{{ cifmw_networking_env_definition.networks.ctlplane | default({}) }}"
+        _ctlplane_node_net: "{{ _node_net.networks[_ctlplane] | default({}) }}"
+        _ctlplane_net: "{{ cifmw_networking_env_definition.networks[_ctlplane] | default({}) }}"
         _dns_server: "{{ _ctlplane_net[dns_version|default('dns_v4')] | default(None) }}"
         _os_net_config_template: "{{ 'os_net_config_overcloud_bgp.yml.j2' if (cifmw_adoption_osp_deploy_bgp | bool) else 'os_net_config_overcloud.yml.j2' }}"
         # Non-BGP specific vars (may not exist in BGP mode, so use default)
diff --git a/roles/adoption_osp_deploy/templates/tripleo-ansible-inventory.yaml.j2 b/roles/adoption_osp_deploy/templates/tripleo-ansible-inventory.yaml.j2
index adc5cb4fbb..66fc8315ce 100644
--- a/roles/adoption_osp_deploy/templates/tripleo-ansible-inventory.yaml.j2
+++ b/roles/adoption_osp_deploy/templates/tripleo-ansible-inventory.yaml.j2
@@ -36,7 +36,7 @@ allovercloud:
 computes:
   children:
     {% for group in _stack.stack_nodes %}
-      {% if 'computes' in group %}
+      {% if 'compute' in group and 'controller' not in group %}
     {{ cifmw_adoption_osp_deploy_scenario.roles_groups_map[group] }}: {}
       {% endif %}
     {% endfor %}
diff --git a/scenarios/adoption/dcn_storage.yml b/scenarios/adoption/dcn_storage.yml
new file mode 100644
index 0000000000..d3bf29f635
--- /dev/null
+++ b/scenarios/adoption/dcn_storage.yml
@@ -0,0 +1,168 @@
+---
+# DCN Storage Adoption Scenario
+# Deploys 3 Ceph clusters: Central (az0), DCN1 (az1), DCN2 (az2)
+# Each cluster runs on 3 HCI compute nodes
+
+_osp_img_data: &osp_base_conf
+  image_local_dir: "{{ cifmw_basedir }}/images/"
+  disk_file_name: osp-base.qcow2
+  image_url: "{{ osp_base_img_url | default(cifmw_discovered_image_url) }}"
+  sha256_image_name: >-
+    {{ osp_base_img_sha256 | default(cifmw_discovered_hash) }}
+
+libvirt_manager_patch_layout:
+  vms:
+    osp-undercloud:
+      <<: *osp_base_conf
+      amount: 1
+      memory: 16
+      cpus: 8
+      disksize: 80
+      nets:
+        - ocpbm
+        - osp_trunk
+    osp-controller:
+      <<: *osp_base_conf
+      amount: 1
+      disksize: 50
+      memory: 8
+      cpus: 4
+      nets:
+        - ocpbm
+        - osp_trunk
+    # Let's remove the default computes, since we want to adopt the
+    # OSP ones
+    compute:
+      amount: 0
+    # Central HCI computes with Ceph (az0)
+    osp-compute:
+      <<: *osp_base_conf
+      amount: "{{ [cifmw_libvirt_manager_compute_amount|int, 3] | max }}"
+      extra_disks_num: 3
+      extra_disks_size: 30G
+      disksize: "{{ [cifmw_libvirt_manager_compute_disksize|int, 50] | max }}"
+      memory: "{{ [cifmw_libvirt_manager_compute_memory|int, 8] | max }}"
+      cpus: "{{ [cifmw_libvirt_manager_compute_cpus|int, 4] | max }}"
+      nets:
+        - ocpbm
+        - osp_trunk
+    dcn1-compute-az1:
+      amount: 0
+    # DCN1 HCI computes with Ceph (az1)
+    osp-dcn1-compute-az1:
+      <<: *osp_base_conf
+      amount: "{{ [cifmw_libvirt_manager_compute_amount|int, 3] | max }}"
+      extra_disks_num: 3
+      extra_disks_size: 30G
+      disksize: "{{ [cifmw_libvirt_manager_compute_disksize|int, 50] | max }}"
+      memory: "{{ [cifmw_libvirt_manager_compute_memory|int, 8] | max }}"
+      cpus: "{{ [cifmw_libvirt_manager_compute_cpus|int, 4] | max }}"
+      nets:
+        - dcn1_pb
+        - dcn1_tr
+    dcn2-compute-az2:
+      amount: 0
+    # DCN2 HCI computes with Ceph (az2)
+    osp-dcn2-compute-az2:
+      <<: *osp_base_conf
+      amount: "{{ [cifmw_libvirt_manager_compute_amount|int, 3] | max }}"
+      extra_disks_num: 3
+      extra_disks_size: 30G
+      disksize: "{{ [cifmw_libvirt_manager_compute_disksize|int, 50] | max }}"
+      memory: "{{ [cifmw_libvirt_manager_compute_memory|int, 8] | max }}"
+      cpus: "{{ [cifmw_libvirt_manager_compute_cpus|int, 4] | max }}"
+      nets:
+        - dcn2_pb
+        - dcn2_tr
+
+networking_mapper_definition_patch:
+  networks:
+    external:
+      network: "10.0.0.0/24"
+      vlan: 44
+      mtu: 1496
+
+  group-templates:
+    osp-controllers:
+      network-template:
+        range:
+          start: 103
+          length: 1
+      networks: &osp_nets
+        ctlplane: {}
+        external:
+          trunk-parent: ctlplane
+        internalapi:
+          trunk-parent: ctlplane
+        tenant:
+          trunk-parent: ctlplane
+        storage:
+          trunk-parent: ctlplane
+        storagemgmt:
+          trunk-parent: ctlplane
+    osp-underclouds:
+      network-template:
+        range:
+          start: 100
+          length: 1
+      networks: *osp_nets
+    computes:
+      network-template:
+        range:
+          start: 200
+          length: 1
+    osp-computes:
+      network-template:
+        range:
+          start: 106
+          length: 3
+      networks:
+        ctlplane: {}
+        internalapi:
+          trunk-parent: ctlplane
+        tenant:
+          trunk-parent: ctlplane
+        storage:
+          trunk-parent: ctlplane
+        storagemgmt:
+          trunk-parent: ctlplane
+    dcn1-compute-az1s:
+      network-template:
+        range:
+          start: 201
+          length: 1
+    osp-dcn1-compute-az1s:
+      network-template:
+        range:
+          start: 111
+          length: 10
+      networks:
+        ctlplanedcn1: {}
+        internalapidcn1:
+          trunk-parent: ctlplanedcn1
+        tenantdcn1:
+          trunk-parent: ctlplanedcn1
+        storagedcn1:
+          trunk-parent: ctlplanedcn1
+        storagemgmtdcn1:
+          trunk-parent: ctlplanedcn1
+    dcn2-compute-az2s:
+      network-template:
+        range:
+          start: 202
+          length: 1
+    osp-dcn2-compute-az2s:
+      network-template:
+        range:
+          start: 121
+          length: 10
+      networks:
+        ctlplanedcn2: {}
+        internalapidcn2:
+          trunk-parent: ctlplanedcn2
+        tenantdcn2:
+          trunk-parent: ctlplanedcn2
+        storagedcn2:
+          trunk-parent: ctlplanedcn2
+        storagemgmtdcn2:
+          trunk-parent: ctlplanedcn2