Help Center> Elastic Load Balance> Service Overview> Load Balancing on a Public or Private Network
Updated on 2023-09-19 GMT+08:00

Load Balancing on a Public or Private Network

A load balancer can work on either a public or private network.

Load Balancing on a Public Network

You can bind an EIP to a load balancer so that it can receive requests from the Internet and route the requests to backend servers.

Figure 1 Load balancing on a public network

Load Balancing on a Private Network

A load balancer has only a private IP address to receive requests from clients in a VPC and routes the requests to backend servers in the same VPC. This type of load balancer can only be accessed in a VPC.

Figure 2 Load balancing on a private network

Network Types and Load Balancers

Table 1 Dedicated load balancers and their network types

Load Balancer Type

Network Type

Description

Dedicated load balancers

Public IPv4 network

Each load balancer has an IPv4 EIP bound to enable it to route requests over the Internet.

Private IPv4 network

Each load balancer has only a private IPv4 address and can route requests in a VPC.

IPv6 network

Each load balancer has an IPv6 address bound.

  • If the IPv6 address is added to a shared bandwidth, the load balancer can route requests over the Internet.
  • If the IPv6 address is not added to a shared bandwidth, the load balancer can route requests only in a VPC.