diff --git a/roles/network_plugin/calico/tasks/install.yml b/roles/network_plugin/calico/tasks/install.yml
index 7944295dd8d..4aac9df5b5c 100644
--- a/roles/network_plugin/calico/tasks/install.yml
+++ b/roles/network_plugin/calico/tasks/install.yml
@@ -232,10 +232,20 @@
           }
 
     - name: Calico | Process calico network pool
-      set_fact:
-        _calico_pool: "{{ _calico_pool_cmd.stdout | from_json | combine(_calico_pool, recursive=True) }}"
       when:
         - _calico_pool_cmd is success
+      block:
+        - name: Calico | Get current calico network pool blocksize
+          set_fact:
+            _calico_blocksize: >
+              {
+                "spec": {
+                  "blockSize": {{ (_calico_pool_cmd.stdout | from_json).spec.blockSize }}
+                }
+              }
+        - name: Calico | Merge calico network pool
+          set_fact:
+            _calico_pool: "{{ _calico_pool_cmd.stdout | from_json | combine(_calico_pool, _calico_blocksize, recursive=True) }}"
 
     - name: Calico | Configure calico network pool
       command:
@@ -273,10 +283,20 @@
           }
 
     - name: Calico | Process calico ipv6 network pool
-      set_fact:
-        _calico_pool_ipv6: "{{ _calico_pool_ipv6_cmd.stdout | from_json | combine(_calico_pool_ipv6, recursive=True) }}"
       when:
         - _calico_pool_ipv6_cmd is success
+      block:
+        - name: Calico | Get current calico ipv6 network pool blocksize
+          set_fact:
+            _calico_blocksize_ipv6: >
+              {
+                "spec": {
+                  "blockSize": {{ (_calico_pool_ipv6_cmd.stdout | from_json).spec.blockSize }}
+                }
+              }
+        - name: Calico | Merge calico ipv6 network pool
+          set_fact:
+            _calico_pool_ipv6: "{{ _calico_pool_ipv6_cmd.stdout | from_json | combine(_calico_pool_ipv6, _calico_blocksize_ipv6, recursive=True) }}"
 
     - name: Calico | Configure calico ipv6 network pool
       command: