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Create Server Load Balancer instances

Last Updated: Nov 27, 2017


Before creating a Server Load Balancer instance, make sure that you have properly prepared the environment. For more information, see Plan and prepare.


  1. Log on to the Server Load Balancer console.

  2. Click Create Server Load Balancer.

  3. Configure the Server Load Balancer instance.

    Basic configuration Region

    Select the region where the Server Load Balancer instance is located.

    Note: make sure that the region of the Server Load Balancer instance is the same as that of backend ECS instances.

    Zone type

    Display the zone type of the selected region.

    The zone of a cloud product refers to a set of independent infrastructure and is usually represented by Internet data centers (IDCs). Different zones have independent infrastructure (network, power supply, air-conditioning and so on). Therefore, an infrastructure fault in one zone will not affect other zones. A zone belongs to a specific region, however, a single region may have one or more zones.

    • Single zone: The Server Load Balancer instance is deployed only in one zone.
    • Multi-zone: The Server Load Balancer instance is deployed in two zones. By default, the instance in the primary zone is used to distribute traffic. If the primary zone is faulty, the instance in the backup zone will automatically take over the load balancing service.
    Primary zone Select the primary zone for the Server Load Balancer instance. The primary zone carries traffic in normal conditions.
    Backup zone Select the backup zone for the Server Load Balancer instance. The backup zone only takes over traffic when the primary zone is unavailable.
    Network and instance type Instance type You can choose to create an Internet or intranet instance based on your business needs. The system will allocate a public IP or private IP accordingly. For more information, see Instance and network type.

    • Internet: Internet Server Load Balancer instances distribute requests from Internet clients to backend ECS instances according to your listening rules.
    • Intranet: Intranet Server Load Balancer instances only distribute requests from clients that have access to the private network of the Server Load Balancer instance.
    Instance Spec

    Select a performance specification for the instance.

    For more information, see How to use guaranteed-performance instances?.

    Network type If the selected instance type is Intranet, you have to select a network type for the instance:

    • Classic network: The IP of the instance is allocated and managed by Alibaba Cloud in a unified manner.
    • VPC: The IP of the instance is allocated from your specified VSwitch CIDR block.
    Bandwidth Display the billing method.
    Purchase plan Quantity Select the quantity.
  4. Click Buy Now.

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