AC6605 Access Controller
Dual-Link Backup White Paper
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1 Dual-Link Backup
About This Chapter
1.1 Introduction to
1.2 Availability
1.3 Principles
1.4 Applications
1.1 Introduction to Dual-Link Backup
Definition
Dual-link backup is implemented by deploying a standby AC at the same layer as the active
AC. The standby AC has the same configuration as the active AC. When the active AC fails,
the backup AC starts to manage services quickly.
Purpose
An AC usually controls thousands of APs and tens of thousands of STAs; therefore, the AC
must be highly reliable. Configuring dual-link backup can ensure stable service operating on a
WLAN network.
Benefits
The dual-link backup technology provides high reliability between important network nodes
to ensure service availability.
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