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https://issues.redhat.com/browse/ACM-25518 #8404

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https://issues.redhat.com/browse/ACM-25518
oafischer Nov 24, 2025
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https://issues.redhat.com/browse/ACM-25518
oafischer Dec 1, 2025
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1 change: 1 addition & 0 deletions networking/submariner/subm_configure.adoc
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Expand Up @@ -19,6 +19,7 @@ Ensure that you have the following prerequisites before using Submariner:
* The firewall configuration must allow 4500/UDP and 4490/UDP on the gateway nodes for establishing tunnels between the managed clusters.
* For {ocp-short} ARM deployments, you must use the `c6g.large` `instanceType` or any other available instance type.
* If the gateway nodes are directly reachable over their private IPs without any NAT in between, make sure that the firewall configuration allows the ESP protocol on the gateway nodes.
* *Technology Preview:* If Open Virtual Network Internet Protocol Security is enabled, you need to enable `IPSecCertAuthMode` in `SubmarinerConfig`.
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*Notes:*
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8 changes: 0 additions & 8 deletions release_notes/known_issues_network.adoc
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Expand Up @@ -106,14 +106,6 @@ To make sure automatic upgrades work when installing Submariner on managed clust

link:https://issues.redhat.com/browse/ACM-6068[ACM-6068]

[#submariner-ovn-not-ipsec]
=== Submariner conflicts with IPsec-enabled OVN-Kubernetes deployments

IPsec tunnels that are created by IPsec-enabled OVN-Kubernetes deployments might conflict with IPsec tunnels that are created by Submariner. Do not use OVN-Kubernetes in IPsec mode with Submariner.

link:https://issues.redhat.com/browse/ACM-12290[ACM-12290]
//this should not have been an Epic. We need to find the doc issue or the bug; the # on the GH link is not compatible here.

[#submariner-uninstall-before-move]
=== Uninstall Submariner before removing _ManagedCluster_ from a _ManageClusterSet_

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