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34 lines
1.7 KiB
Plaintext
34 lines
1.7 KiB
Plaintext
---
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layout: docs
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page_title: Federated Network Areas (Enterprise)
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description: >-
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Network areas connect individual datacenters in a WAN federation, providing an alternative to connecting every datacenter. Learn how to support hub-and-spoke network topologies in a WAN federated Consul deployment.
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---
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# Consul Enterprise Advanced Federation
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<EnterpriseAlert>
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This feature requires
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self-managed Consul Enterprise.
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Refer to the [enterprise feature matrix](/docs/enterprise#consul-enterprise-feature-availability) for additional information.
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</EnterpriseAlert>
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Consul's core federation capability uses the same gossip mechanism that is used
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for a single datacenter. This requires that every server from every datacenter
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be in a fully connected mesh with an open gossip port (8302/tcp and 8302/udp)
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and an open server RPC port (8300/tcp). For organizations with large numbers of
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datacenters, it becomes difficult to support a fully connected mesh. It is often
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desirable to have topologies like hub-and-spoke with central management
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datacenters and "spoke" datacenters that can't interact with each other.
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[Consul Enterprise](https://www.hashicorp.com/consul) offers a [network
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area mechanism](https://learn.hashicorp.com/tutorials/consul/federation-network-areas) that allows operators to
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federate Consul datacenters together on a pairwise basis, enabling
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partially-connected network topologies. Once a link is created, Consul agents
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can make queries to the remote datacenter in service of both API and DNS
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requests for remote resources (in spite of the partially-connected nature of the
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topology as a whole). Consul datacenters can simultaneously participate in both
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network areas and the existing WAN pool, which eases migration.
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