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Update Ambient pre-requisites for OpenShift clusters #16877

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Update Ambient pre-requisites for OpenShift clusters #16877

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1 change: 1 addition & 0 deletions .spelling
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Expand Up @@ -994,6 +994,7 @@ otel-collector
outsized
overridden
Ovidiu
OVN-Kubernetes
p50
p90
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5 changes: 5 additions & 0 deletions content/en/docs/ambient/install/platform-prerequisites/index.md
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Expand Up @@ -228,6 +228,11 @@ For example:

OpenShift requires that `ztunnel` and `istio-cni` components are installed in the `kube-system` namespace, and that you set `global.platform=openshift` for all charts.

Note: If your pod manifests include liveness or readiness probes, the OVN-Kubernetes CNI must be configured to run in `local` gateway mode for these probes to work
properly. In this mode, traffic is routed through the host and applied to the host’s routing table. By default, OVN-Kubernetes runs in `shared` gateway mode, where
traffic bypasses the host and OVS sends it directly to the node IP interface. To switch from `shared` to `local` gateway mode at runtime, follow the steps
described [here](https://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/ovn-kubernetes_network_plugin/configuring-gateway-mode#configuring-gateway-mode).

{{< tabset category-name="install-method" >}}

{{< tab name="Helm" category-value="helm" >}}
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