Network Types (Dedicated Load Balancers)

Description

Load balancers work on both public and private networks.

Dedicated load balancers support three network types as described in Table 1.

**Table 1** Dedicated load balancers and their network types
Network Type	Description
Public IPv4 network	Each load balancer has an IPv4 EIP bound to route requests from the Internet to backend servers.
Private IPv4 network	Each load balancer has only a private IPv4 address and routes requests from the same VPC to backend servers.
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 only route requests in a VPC. NOTE: If you need IPv6 networks, you must select a backend subnet with IPv6 enabled for your dedicated load balancer. If you do not enable IPv6 for the specified backend subnet when you create a dedicated load balancer, the load balancer cannot use IPv6 addresses to route requests.

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 balancers can only be accessed in a VPC.

Figure 2 Load balancing on a private network