--- charts-original/templates/cilium-configmap.yaml
+++ charts/templates/cilium-configmap.yaml
@@ -1,3 +1,11 @@
+{{- if empty .Values.global.clusterCIDRv4 }}
+{{- $_ := set .Values.ipv4 "enabled" false -}}
+{{- end }}
+
+{{- if not (empty .Values.global.clusterCIDRv6) }}
+{{- $_ := set .Values.ipv6 "enabled" true -}}
+{{- end }}
+
 {{- if and (.Values.agent) (not .Values.preflight.enabled) }}
 {{- /*  Default values with backwards compatibility */ -}}
 {{- $defaultBpfMapDynamicSizeRatio := 0.0 -}}
@@ -289,7 +297,11 @@
 
   # Enable IPv6 addressing. If enabled, all endpoints are allocated an IPv6
   # address.
-  enable-ipv6: {{ .Values.ipv6.enabled | quote }}
+{{- if coalesce .Values.global.clusterCIDRv6 .Values.ipv6.enabled }}
+  enable-ipv6: "true"
+{{ else }}
+  enable-ipv6: "false"
+{{- end }}
 
 {{- if .Values.cleanState }}
   # If a serious issue occurs during Cilium startup, this
@@ -468,6 +480,8 @@
   tunnel-protocol: "vxlan"
 {{- else if .Values.routingMode }}
   routing-mode: {{ .Values.routingMode | quote }}
+{{- else if not .Values.ipv4.enabled }}
+  routing-mode: "native"
 {{- else }}
   # Default case
   routing-mode: "tunnel"
@@ -662,6 +676,8 @@
 
 {{- if .Values.ipv6NativeRoutingCIDR }}
   ipv6-native-routing-cidr: {{ .Values.ipv6NativeRoutingCIDR }}
+{{- else if not .Values.ipv4.enabled }}
+  ipv6-native-routing-cidr: {{ .Values.global.clusterCIDRv6 }}
 {{- end }}
 
 {{- if hasKey .Values "fragmentTracking" }}