diff --git a/core/internal/containerd/BUILD.bazel b/core/internal/containerd/BUILD.bazel
index 56c2822..a1deae0 100644
--- a/core/internal/containerd/BUILD.bazel
+++ b/core/internal/containerd/BUILD.bazel
@@ -15,6 +15,5 @@
 exports_files([
     "config.toml",
     "runsc.toml",
-    "loopback.json",
-    "ptp.json",
+    "cnispec.gojson",
 ])
diff --git a/core/internal/containerd/cnispec.gojson b/core/internal/containerd/cnispec.gojson
new file mode 100644
index 0000000..0057036
--- /dev/null
+++ b/core/internal/containerd/cnispec.gojson
@@ -0,0 +1,29 @@
+{{- /*gotype: github.com/containerd/cri/pkg/server.cniConfigTemplate*/ -}}
+{
+    "name": "k8s-pod-network",
+    "cniVersion": "0.3.1",
+    "plugins": [
+        {
+            "type": "ptp",
+            "mtu": 1420,
+            "ipam": {
+                "type": "host-local",
+                "dataDir": "/containerd/run/ipam",
+                "ranges": [
+                    {{range $i, $range := .PodCIDRRanges}}{{if $i}},
+            {{end}}[
+            {
+                "subnet": "{{$range}}"
+            }
+        ]
+        {{end}}
+    ],
+    "routes": [
+        {{range $i, $route := .Routes}}{{if $i}},
+    {{end}}{
+    "dst": "{{$route}}"
+}{{end}}]
+}
+}
+]
+}
\ No newline at end of file
diff --git a/core/internal/containerd/config.toml b/core/internal/containerd/config.toml
index 5a7e2f6..415391a 100644
--- a/core/internal/containerd/config.toml
+++ b/core/internal/containerd/config.toml
@@ -90,8 +90,8 @@
     [plugins."io.containerd.grpc.v1.cri".cni]
       bin_dir = "/containerd/bin/cni"
       conf_dir = "/containerd/conf/cni"
-      max_conf_num = 1
-      conf_template = ""
+      max_conf_num = 0
+      conf_template = "/containerd/conf/cnispec.gojson"
     [plugins."io.containerd.grpc.v1.cri".registry]
       [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
         [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
diff --git a/core/internal/containerd/loopback.json b/core/internal/containerd/loopback.json
deleted file mode 100644
index f375c5d..0000000
--- a/core/internal/containerd/loopback.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "cniVersion": "0.3.0",
-  "type": "loopback"
-}
diff --git a/core/internal/containerd/ptp.json b/core/internal/containerd/ptp.json
deleted file mode 100644
index d95da5d..0000000
--- a/core/internal/containerd/ptp.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "name": "k8s-pod-network",
-  "cniVersion": "0.3.1",
-  "type": "ptp",
-  "mtu": 1420,
-  "ipam": {
-    "type": "host-local",
-    "subnet": "192.168.198.0/24",
-    "routes": [{ "dst": "0.0.0.0/0" }],
-    "dataDir": "/containerd/run/ipam"
-  }
-}