Help Center/ Elastic Load Balance/ User Guide/ User Guide for Dedicated Load Balancers/ Load Balancer/ Modifying the Basic Configurations of a Dedicated Load Balancer
Updated on 2025-07-02 GMT+08:00
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Modifying the Basic Configurations of a Dedicated Load Balancer

As your service develops, the service traffic might surge, service types might change, and backend services might have to be migrated. If these happen, you can change the basic information of a dedicated load balancer, such as its specifications and AZ.

Modifying Specifications

A load balancer with elastic specifications has obvious advantages over the one with fixed specifications in scaling scenarios. If your service fluctuates greatly, you can use load balancers with elastic specifications to simplify management and reduce O&M complexity.

If you use a load balancer with fixed specifications and the specifications do not match your service needs, you can upgrade the specifications to ensure stable service running or downgrade the specifications to save costs. If your service type changes, you can also change the load balancing type of the load balancer.

On the console, you can:

  • Change elastic specifications to fixed specifications, or the other way round.
  • Change application load balancing to network load balancing, or the other way round.

    You must keep at least one load balancing type. Before removing a load balancing type, you must delete the:

    • HTTP or HTTPS listeners added to an application load balancer.
    • TCP or UDP listeners added to a network load balancer.
  • Upgrade or downgrade the fixed specifications, for example, upgrade small I to medium I, or downgrade large I to medium I.
  • Upgrading specifications does not interrupt your services.
  • Downgrading specifications will temporarily disconnect services.
    • New TCP/UDP connections may fail to be established.
    • New HTTP/HTTPS connections may fail to be established and some persistent connections may be interrupted.

Pay-per-Use

Table 1 Supported change options for a pay-per-use load balancer

Billing Mode

Specification Type

Change to Elastic

Change to Fixed

Add Load Balancing Type

Remove Load Balancing Type

Upgrade Specifications

Downgrade Specifications

Pay-per-use

Elastic

N/A

Supported

Supported

Supported

N/A

N/A

Fixed

Supported

N/A

Supported

Supported

Supported

Supported
  1. Go to the load balancer list page.
  2. On the displayed page, locate the load balancer, click More in the Operation column, and select Change Specifications.
  3. Select the new specifications and click Next.
  4. Confirm the information and click Submit.
  5. On the load balancer list page, check the new specifications in the Specifications column of the target dedicated load balancer.

Can I Change the Load Balancing Type of a Load Balancer?

Yes, you can change an application load balancer to a network load balancer, or the other way around.

Does Changing Specifications Interrupt Services?

Upgrading specifications does not interrupt your services, but downgrading specifications temporarily does.

Parent topic: Load Balancer