Table Of Contents

Introduction

Prerequisites

Requirements

Components Used

Conventions

Introduction

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The N+1 HA feature set within the Cisco Unified Wireless Network (CUWN) framework allows a single WLC to be used as a backup WLC for N primary controllers. (See Figure 1-1.) Earlier than release 7.4, the N+1 HA model requires a permanent AP count license on the backup controller. With Release 7.4 and later, an HA-SKU secondary controller can be used as the backup controller for multiple primary controllers. The overall goal for the addition of N+1 HA with HA-SKU is to reduce the total cost of ownership (TCO) for geographically separate HA deployments across the WAN link.

Figure 1-1 N+1 HA Topology

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on these software and hardware versions:

• 5500, 7500, and 8500 Series WLCs; Wireless Services Module 2 (WiSM-2) WLCs

• 1130, 1240, 1250, 1040, 1140, 1260, 3500, and 3600 Series APs; 1520 or 1550 Series Mesh APs

The information in this document was created from the devices in a specific lab environment. All devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.