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11.2.1 Before You Start
Before configuring a multi-device backup platform, learning the applicable environment, pre-
configuration tasks, and data preparation can help you rapidly and correctly finish the
configuration task.
Applicable Environment
When the NE80E/40E acts as an edge service device, it is directly connected to a convergence
device. The convergence device is connected to downstream DSLAMs and upstream NE80E/
40Es. When one or several master NE80E/40Es fail, to switch over services to the backup device,
the NE80E/40Es need to work in N:1 redundancy mode, that is, multi-device backup.
Multi-device backup uses VRRP, which operates on Ethernet, to determine master/backup
devices. Other link detection protocols such as BFD, 802.1ag, and 802.1ah can cooperate with
VRRP to change the VRRP status.
During the backup, the RBS acts as a general backup module and uses TCP for transmission.
The RBS offers registration interfaces to other service modules, providing batch backup and
real-time backup. After a TCP connection is set up, the system performs data transmission of
batch backup and real-time backup through the backup protocol. Meanwhile, the RBP offers
user interfaces for configuring multi-device backup of the same style to users. The applications
of multi-device backup are all based on RBP.
Pre-configuration Tasks
Before establishing the multi-device backup platform, complete the following tasks:
l
Configure peer BFD, link BFD, or Ethernet OAM at the user side.
l
Configure peer BFD at the network side.
l
Configure a local or remote IP address pool. (The IP address pools on the devices that back
up each other must be the same.)
Data Preparation
To establish the multi-device backup platform, you need the following data.
No.
Data
1
VRRP backup group ID
2
IP addresses of devices that back up each other
3
Backup ID, which is used together with the RBS to determine the RBP that the
user belongs to
4
IP address pool name
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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