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20 lines
1019 B
Plaintext
20 lines
1019 B
Plaintext
// Module included in the following assemblies:
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//
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// * networking/ovn_kubernetes_network_provider/enabling-multicast.adoc
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:_mod-docs-content-type: CONCEPT
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[id="nw-about-multicast_{context}"]
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= About multicast
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[role="_abstract"]
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With IP multicast, data is broadcast to many IP addresses simultaneously.
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[IMPORTANT]
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====
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* At this time, multicast is best used for low-bandwidth coordination or service discovery and not a high-bandwidth solution.
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* By default, network policies affect all connections in a namespace. However, multicast is unaffected by network policies. If multicast is enabled in the same namespace as your network policies, it is always allowed, even if there is a `deny-all` network policy.
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* Cluster administrators must consider the implications of the exemption of multicast from network policies before enabling it.
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====
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Multicast traffic between {product-title} pods is disabled by default. If you are using the OVN-Kubernetes network plugin, you can enable multicast on a per-project basis.
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