consul/website/source/api/operator/segment.html.md
Paul Banks 88388d760d Support Agent Caching for Service Discovery Results (#4541)
* Add cache types for catalog/services and health/services and basic test that caching works

* Support non-blocking cache types with Cache-Control semantics.

* Update API docs to include caching info for every endpoint.

* Comment updates per PR feedback.

* Add note on caching to the 10,000 foot view on the architecture page to make the new data path more clear.

* Document prepared query staleness quirk and force all background requests to AllowStale so we can spread service discovery load across servers.
2018-10-10 16:55:34 +01:00

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---
layout: api
page_title: Network Segments - Operator - HTTP API
sidebar_current: api-operator-segment
description: |-
The /operator/segment endpoint exposes the network segment information via
Consul's HTTP API.
---
# Network Areas - Operator HTTP API
The `/operator/segment` endpoint provides tools to manage network segments via
Consul's HTTP API.
~> **Enterprise-only!** This API endpoint and functionality only exists in
Consul Enterprise. This is not present in the open source version of Consul.
The network area functionality described here is available only in
[Consul Enterprise](https://www.hashicorp.com/products/consul/) version 0.9.3 and
later. Network segments are operator-defined sections of agents on the LAN, typically
isolated from other segments by network configuration.
Please see the [Network Segments Guide](/docs/guides/segments.html) for more details.
## List Network Segments
This endpoint lists all network areas.
| Method | Path | Produces |
| ------ | ---------------------------- | -------------------------- |
| `GET` | `/operator/segment` | `application/json` |
The table below shows this endpoint's support for
[blocking queries](/api/index.html#blocking-queries),
[consistency modes](/api/index.html#consistency-modes),
[agent caching](/api/index.html#agent-caching), and
[required ACLs](/api/index.html#acls).
| Blocking Queries | Consistency Modes | Agent Caching | ACL Required |
| ---------------- | ----------------- | ------------- | --------------- |
| `NO` | `none` | `none` | `operator:read` |
### Parameters
- `dc` `(string: "")` - Specifies the datacenter to query. This will default to
the datacenter of the agent being queried. This is specified as a URL query
parameter.
### Sample Request
```text
$ curl \
http://127.0.0.1:8500/v1/operator/segment
```
### Sample Response
```json
["","alpha","beta"]
```