Load Balancing Mode; Applications; Interface Backup In Active/Standby Mode - Huawei AR530 Series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Reliability

2.2.2 Load Balancing Mode

As shown in
backup interfaces. When the load balancing mode is used, the system periodically checks
whether the traffic volume is within the allowed range:
l
l
l
Figure 2-2 Interfaces working in load balancing mode

2.3 Applications

This section describes the applicable scenario of Interface Backup.

2.3.1 Interface Backup in Active/Standby Mode

As shown in
ADSL interface ATM3/0/0. To ensure that enterprise users can connect to the IP network when
the ADSL interface is faulty, the link of a 3G interface is used as the backup link. When the
active interface is faulty, the backup link is started to transmit services.
Issue 01 (2014-11-30)
Figure 2-2, Interface1 is the primary interface, and Interface2 and Interface3 are
If the traffic volume of Interface1 exceeds the upper threshold, the backup interface with
the highest priority is selected to load balance services together with Interface1.
If the load balanced traffic volume still exceeds the upper threshold, the backup interface
with the secondary highest priority is selected to load balance services with the preceding
two interfaces. This process is repeated until all the backup interfaces transmit traffic.
When the traffic volume falls below the lower threshold, the backup interface with the
lowest priority participating in load balancing is shut down. This process is repeated until
only the primary interface transmits traffic.
Interface1
RouterA
Interface2
Interface3
A%+B%+C%=100%
Figure 2-3, the enterprise egress gateway RouterA connects to the Internet through
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A%
RouterB
B%
C%
2 Interface Backup Configuration
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