R3204P16-HP Load Balancing Module Load Balancing Configuration Guide-6PW101

Load balancing configuration

NOTE:

The SecBlade LB module supports confi

urin

IPv4 server load balancin

and firewall load balancin

onl

in the web interface.

Load balancing overview

Load balancing (referred to as LB hereinafter) is a cluster technology to distribute some specific services

such as network services and network traffic among multiple network devices (for example servers and

firewalls), enhancing service processing capability and ensuring high reliability of services.

LB features the following advantages:

• High performance: LB distributes services to multiple network devices, enhancing the performance

of the whole system.

• Scalability: LB facilitates the addition of network devices in a cluster, meeting the ever-increasing

service requirements for servers, without decreasing service quality.

• Reliability: Failure of a single or multiple devices will not result in service interruption, enhancing the

reliability of the entire system.

• Manageability: Administration is performed only on LB-enabled device(s), and devices need only

common configuration and maintenance.

• Transparency: A cluster is like a device with high availability and performance, and users are not

aware of and do not care the specific network structure. In addition, increase or decrease of devices

will not affect normal services.

Classification of LB

LB generally falls into two types:

• Server load balancing

• Firewall load balancing

The two types of load balancing can be applied in the following scenarios:

• Server load balancing: Data centers generally adopt server load balancing for networking.

Network services are distributed to multiple servers to enhance service processing capabilities of

the data centers.

• Firewall load balancing: In the networks where firewall processing capabilities have become the

bottleneck, firewall load balancing can be adopted to balance the network traffic among multiple

firewalls to enhance the processing capabilities of firewalls.

Working mechanism of server load balancing

Server load balancing can be applied in two ways:

• Network Address Translation (NAT)-mode server load balancing