diff --git a/inventory/sample/group_vars/k8s_cluster/k8s-net-calico.yml b/inventory/sample/group_vars/k8s_cluster/k8s-net-calico.yml
index cb8cde067e2193671a03eadcbdc35c5c4c5b1229..553e48b9877be8b8f1a1184a4e78553abdb37099 100644
--- a/inventory/sample/group_vars/k8s_cluster/k8s-net-calico.yml
+++ b/inventory/sample/group_vars/k8s_cluster/k8s-net-calico.yml
@@ -19,7 +19,7 @@ calico_cni_name: k8s-pod-network
 # calico_pool_name: "default-pool"
 
 # add default ippool blockSize (defaults kube_network_node_prefix)
-# calico_pool_blocksize: 24
+calico_pool_blocksize: 26
 
 # add default ippool CIDR (must be inside kube_pods_subnet, defaults to kube_pods_subnet otherwise)
 # calico_pool_cidr: 1.2.3.4/5
diff --git a/roles/network_plugin/calico/defaults/main.yml b/roles/network_plugin/calico/defaults/main.yml
index e7711424449ac67b5f4a2b91509cc486e043aa3d..2f1c42e0b7049f2f3d167a82e55c2074ab2b9762 100644
--- a/roles/network_plugin/calico/defaults/main.yml
+++ b/roles/network_plugin/calico/defaults/main.yml
@@ -16,10 +16,15 @@ calico_vxlan_mode: Always  # valid values are 'Always', 'Never' and 'CrossSubnet
 calico_cni_pool: true
 calico_cni_pool_ipv6: true
 
+# add default ippool blockSize (defaults kube_network_node_prefix)
+calico_pool_blocksize: 26
+
 # Calico doesn't support ipip tunneling for the IPv6.
 calico_ipip_mode_ipv6: Never
 calico_vxlan_mode_ipv6: Never
-calico_pool_blocksize_ipv6: 116
+
+# add default ipv6 ippool blockSize (defaults kube_network_node_prefix_ipv6)
+calico_pool_blocksize_ipv6: 122
 
 # Calico network backend can be 'bird', 'vxlan' and 'none'
 calico_network_backend: vxlan
diff --git a/tests/files/packet_debian11-calico-upgrade-once.yml b/tests/files/packet_debian11-calico-upgrade-once.yml
index 9dd264ad9faf9ae3d408684d1ec58811f203b271..3c589a0bdd972f1c1ad09615273cf8666e8d3080 100644
--- a/tests/files/packet_debian11-calico-upgrade-once.yml
+++ b/tests/files/packet_debian11-calico-upgrade-once.yml
@@ -8,6 +8,7 @@ download_run_once: true
 
 # Pin disabling ipip mode to ensure proper upgrade
 ipip: false
+calico_pool_blocksize: 26
 calico_vxlan_mode: Always
 calico_network_backend: bird
 
diff --git a/tests/files/packet_debian11-calico-upgrade.yml b/tests/files/packet_debian11-calico-upgrade.yml
index 3df0f6d8d1bb5405dff26d0c76e56ff9e23633a1..1b05714e41121cb0b3099e229079e97251102e42 100644
--- a/tests/files/packet_debian11-calico-upgrade.yml
+++ b/tests/files/packet_debian11-calico-upgrade.yml
@@ -5,6 +5,7 @@ mode: default
 
 # Pin disabling ipip mode to ensure proper upgrade
 ipip: false
+calico_pool_blocksize: 26
 calico_vxlan_mode: Always
 calico_network_backend: bird
 
diff --git a/tests/testcases/040_check-network-adv.yml b/tests/testcases/040_check-network-adv.yml
index 2c765bd72e3e86451e0cc3139c13560e74552708..8d1e5122ebfd72b73582fa0b31760ba95fa6d3a0 100644
--- a/tests/testcases/040_check-network-adv.yml
+++ b/tests/testcases/040_check-network-adv.yml
@@ -2,7 +2,7 @@
 - hosts: kube_node
   tasks:
     - name: Test tunl0 routes
-      shell: "set -o pipefail && ! /sbin/ip ro | grep '/{{ calico_pool_blocksize}} | default(26) via' | grep -v tunl0"
+      shell: "set -o pipefail && ! /sbin/ip ro | grep '/{{ calico_pool_blocksize }} | default(26) via' | grep -v tunl0"
       args:
         executable: /bin/bash
       when: