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Update upgrade page

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paigehargrave 2019-06-13 16:22:06 -04:00 committed by GitHub
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---
title: Upgrade Docker EE
description: Learn how to upgrade your Docker Enterprise Edition, to start using the latest features and security patches.
title: Upgrade Docker Enterprise
description: Learn how to upgrade your Docker Enterprise to start using the latest features and security patches.
keywords: enterprise, upgrade
redirect_from:
- /enterprise/upgrade/
---
## Docker Engine - Enterprise 18.09 Upgrades
In Docker Engine - Enterprise 18.09, significant architectural improvements were made to the network
architecture in Swarm to increase the performance and scale of the built-in load balancing functionality.
> **Note**: These changes introduce new constraints to the Docker Engine - Enterprise upgrade process that,
> if not correctly followed, can have impact on the availability of applications running on the Swarm. These
> constraints impact any upgrades coming from any version before 18.09 to version 18.09 or greater.
## Cluster Upgrade Best Practices
Docker Engine - Enterprise upgrades in Swarm clusters should follow these guidelines in order to avoid IP address
space exhaustion and associated application downtime.