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---
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layout: docs
page_title: Consul Enterprise Advanced Federation
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sidebar_title: Advanced Federation
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description: >-
Consul Enterprise enables you to federate Consul datacenters together on a
pairwise basis, enabling partially-connected network topologies like
hub-and-spoke.
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---
# Consul Enterprise Advanced Federation
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<EnterpriseAlert>
This feature requires <a href="https://www.hashicorp.com/products/consul/">Consul Enterprise</a> with the Global Visibility, Routing, and Scale module.
</EnterpriseAlert>
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Consul's core federation capability uses the same gossip mechanism that is used
for a single datacenter. This requires that every server from every datacenter
be in a fully connected mesh with an open gossip port (8302/tcp and 8302/udp)
and an open server RPC port (8300/tcp). For organizations with large numbers of
datacenters, it becomes difficult to support a fully connected mesh. It is often
desirable to have topologies like hub-and-spoke with central management
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/consul/day-2-operations/advanced-federation) that allows operators to
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federate Consul datacenters together on a pairwise basis, enabling
partially-connected network topologies. Once a link is created, Consul agents
can make queries to the remote datacenter in service of both API and DNS
requests for remote resources (in spite of the partially-connected nature of the
topology as a whole). Consul datacenters can simultaneously participate in both
network areas and the existing WAN pool, which eases migration.
