diff --git a/roles/cluster-addon/vars/main.yml b/roles/cluster-addon/vars/main.yml
index f2a995cd9..a741e12bc 100644
--- a/roles/cluster-addon/vars/main.yml
+++ b/roles/cluster-addon/vars/main.yml
@@ -1,4 +1,4 @@
 # default values
 
 # coredns 服务地址，根据SERVICE_CIDR 设置，默认选择网段第二个地址
-CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|int + 2 }}"
+CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|regex_replace('/.*', '')|int + 2 }}"
diff --git a/roles/kube-master/vars/main.yml b/roles/kube-master/vars/main.yml
index 06a806581..7f606241f 100644
--- a/roles/kube-master/vars/main.yml
+++ b/roles/kube-master/vars/main.yml
@@ -3,4 +3,4 @@ TMP_ENDPOINTS: "{% for h in groups['etcd'] %}https://{{ h }}:2379,{% endfor %}"
 ETCD_ENDPOINTS: "{{ TMP_ENDPOINTS.rstrip(',') }}"
 
 # kubernetes.default.svc 地址根据SERVICE_CIDR 设置为网段的第一个地址
-CLUSTER_KUBERNETES_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|int + 1 }}"
+CLUSTER_KUBERNETES_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|regex_replace('/.*', '')|int + 1 }}"
diff --git a/roles/kube-node/vars/main.yml b/roles/kube-node/vars/main.yml
index 2bd25c41b..aa557cf1d 100644
--- a/roles/kube-node/vars/main.yml
+++ b/roles/kube-node/vars/main.yml
@@ -5,7 +5,7 @@ KUBE_APISERVER: "https://127.0.0.1:{{ SECURE_PORT }}"
 CGROUP_DRIVER: "systemd"
 
 # coredns 服务地址，根据SERVICE_CIDR 设置，默认选择网段第二个地址
-CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|int + 2 }}"
+CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|regex_replace('/.*', '')|int + 2 }}"
 
 # pod-max-pids
 POD_MAX_PIDS: -1
diff --git a/roles/kube-ovn/vars/main.yml b/roles/kube-ovn/vars/main.yml
index 94ad1da5b..bd868deac 100644
--- a/roles/kube-ovn/vars/main.yml
+++ b/roles/kube-ovn/vars/main.yml
@@ -1,5 +1,5 @@
 # CLUSTER_CIDR_GW 作为 POD_GATEWAY，选取CLUSTER_CIDR 网段中的第一个地址
-CLUSTER_CIDR_GW: "{{ CLUSTER_CIDR.split('.')[0] }}.{{ CLUSTER_CIDR.split('.')[1] }}.{{ CLUSTER_CIDR.split('.')[2] }}.{{ CLUSTER_CIDR.split('.')[3]|int + 1 }}"
+CLUSTER_CIDR_GW: "{{ CLUSTER_CIDR.split('.')[0] }}.{{ CLUSTER_CIDR.split('.')[1] }}.{{ CLUSTER_CIDR.split('.')[2] }}.{{ CLUSTER_CIDR.split('.')[3]|regex_replace('/.*', '')|int + 1 }}"
 
 # coredns 服务地址，根据SERVICE_CIDR 设置，默认选择网段第二个地址
-CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|int + 2 }}"
+CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR.split('.')[0] }}.{{ SERVICE_CIDR.split('.')[1] }}.{{ SERVICE_CIDR.split('.')[2] }}.{{ SERVICE_CIDR.split('.')[3]|regex_replace('/.*', '')|int + 2 }}"