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11.4.1 Before You Start
Before configuring multi-device backup of BRAS user information, learning the applicable
environment, pre-configuration tasks, and data preparation can help you rapidly and correctly
finish the configuration task.
Applicable Environment
To improve the reliability of the network and shorten the interruption time, you need to configure
user information backup between master and slave devices. After the user is connected to the
master device, the master device backs up user information to the slave device and the slave
device generates user information and sends the forwarding table. When a fault occurs on the
network, user routes are controlled by master and slave devices so that the user traffic can reach
the slave device and is forwarded to the user. The user does not detect the fault during the fault
occurrence and can log in again without dialing.
Pre-configuration Tasks
Before configuring multi-device backup of BRAS user information, complete the following
tasks:
l
Establish the multi-device backup platform.
l
Configure an IP address pool. (The IP address pools on the devices that back up each other
must be the same.)
Data Preparation
To configure multi-device backup of BRAS user information, you need the following data.
No.
Data
1
IP address pool name
2
Logical IP address, logical interface, and logical host name
3
Tunnel policy name or VPN name
11.4.2 (Optional) Disabling RUI Backup for Users Getting Online
from a Specified Domain
RUI backup can be disabled for users that get online from a specified domain as needed.
Context
RUI backup is enabled by default for users that get online through an AAA domain. To disable
this function, run the
undo peer-backup enable
command. If RUI backup is disabled for users
that get online through the AAA domain but two-node hot backup is enabled on the interface
from which these users get online, user information will not be backed up after the users are
authenticated on the interface.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
11 Multi-node Backup Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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