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2.1 Introduction of Interface Backup
In the interface backup mechanism, interfaces are classified into the active interface and standby
interface. The interfaces work in active/standby mode or load balancing mode.
2.1.1 Interface Backup Overview
Interface backup refers to the backup relationship between interfaces on the same device. When
an interface fails, traffic can be quickly switched to its standby interface.
The router plays an important role in the network. When an interface on a router fails, a key
method to ensure the security and smooth functioning of the service is to rapidly switch the
service on the interface to other normal interfaces.
Interface backup means that interfaces on a router serve as the backup for each other. Usually,
a single interface undertakes services while the other interfaces are in the backup state.
shows the interface backup.
Figure 2-1
Interface backups
if1
if2
if3
if4
LAN
Interfaces if1, if2, and if3 are backed up for each other. For example, if2 transmits services. if1
and if3 are in the backup state and have their respective backup priorities.
The router traces the status of each interface. When if2 fails, the router enables the standby
interface with a higher priority to replace if2. This ensures smooth and reliable transmission of
services.
The interface backup mechanism divides interfaces into the active interface and the standby
interface according to their roles in the service transmission process.
NOTE
POS and ATM interfaces cannot be configured on the X1 and X2 models of the NE80E/40E.
Active Interface
The active interface undertakes service transmission and is backed up by other interfaces, such
as if2 in
Any physical interface or sub-interface like Ethernet interface serves as an active interface on a
router. An active interface with larger bandwidth provides a higher transmission rate.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
2 Interface Backup Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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