diff --git a/.github/workflows/externalworkloads.yaml b/.github/workflows/externalworkloads.yaml
index 62a1a6b403..d6bc3a7382 100644
--- a/.github/workflows/externalworkloads.yaml
+++ b/.github/workflows/externalworkloads.yaml
@@ -120,6 +120,9 @@ jobs:
           gcloud container clusters create ${{ env.clusterName }} \
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
+            --enable-ip-alias \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
diff --git a/.github/workflows/gke.yaml b/.github/workflows/gke.yaml
index 0081e2ad79..a68b0591d8 100644
--- a/.github/workflows/gke.yaml
+++ b/.github/workflows/gke.yaml
@@ -100,7 +100,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
diff --git a/.github/workflows/multicluster.yaml b/.github/workflows/multicluster.yaml
index 0c39be0921..9c3b2e7962 100644
--- a/.github/workflows/multicluster.yaml
+++ b/.github/workflows/multicluster.yaml
@@ -110,7 +110,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
@@ -134,7 +136,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \