# Creating a Dedicated Load Balancer

#### Scenarios

You have prepared everything required for creating a dedicated load balancer. For details, see Preparations for Creating a Load Balancer.

Dedicated load balancers can be created only in the eu-nl region. By default, load balancers created in this region are dedicated load balancers.

#### Procedure

1. Log in to the management console.
2. In the upper left corner of the page, click and select the desired region and project.
3. Hover on in the upper left corner to display Service List and choose Network > Elastic Load Balancing.
4. Click Create Load Balancer and configure the parameters based on Table 1.

   Table 1 Parameter description
   Parameter | Description | Example Value
   --- | --- | ---
   Type | Specifies the type of the load balancer. | Dedicated
   Region | Specifies the region. Resources in different regions cannot communicate with each other over internal networks. For lower network latency and faster access to resources, select the nearest region. | eu-nl

   AZ

   Specifies the AZs of the load balancer. You can deploy the load balancer in multiple AZs to ensure service continuity and improve application reliability. When an AZ becomes faulty or unavailable, requests are quickly routed to backend servers in other AZs.

   If backend servers reside in two AZs, for example, AZ 1 and AZ 2, but you plan to create the load balancer only in AZ 1, Xen ECSs cannot be used as clients.

   NOTE:

   If you change the AZs of an existing load balancer, the load balancer may fail to route requests for several seconds. It is recommended that you plan the AZs in advance, or change the AZs during off-peak hours when necessary.

   N/A

   Network Type

   Specifies the type of the network where the load balancer works. You can select one or more network types.
   - Public IPv4 network: The load balancer routes requests from the clients to backend servers over the Internet.
   - Private IPv4 network: The load balancer routes requests from the clients to backend servers in a VPC.
   NOTE:

   If you do not select any of the options, the load balancer cannot communicate with the clients after it is created. When you are using ELB or testing network connectivity, ensure that the load balancer has a public or private IP address bound.

   Private IPv4 network

   VPC | Specifies the VPC where the load balancer works. You need to configure this parameter regardless of the selected network type. Select an existing VPC or create one. For more information about VPC, see the Virtual Private Cloud User Guide. | vpc-4536
   Subnet | Specifies the subnet where the load balancer will reside. You need to configure this parameter regardless of the selected network type. | subnet-4536
   Public IPv4 network configuration

   EIP

   If you select Public IPv4 network for Network Type, you need to bind an EIP to the load balancer. Two options are available:
   - New EIP: The system will assign a new EIP to the load balancer.
   - Use existing: Select an existing EIP for the load balancer. NOTE:
     - By default, load balancers created in the eu-nl region are dedicated load balancers. You can unbind an EIP from a dedicated load balancer only on the ELB console if you no longer need the EIP.
     - If you bind a new EIP to the load balancer and specify a shared bandwidth, this EIP will be added to the shared bandwidth.
     - If you set EIP to New EIP when you create a dedicated load balancer in the eu-de region, the system will automatically assign and bind a dedicated EIP to the load balancer for exclusive use. This type of EIPs can be assigned only when you create dedicated load balancers and can only be bound to dedicated load balancers. If you set EIP to Use existing, you can select one from the dedicated EIPs that were assigned when you created dedicated load balancers and have been unbound from the dedicated load balancers.
     - To unbind an EIP from a load balancer, locate the load balancer and choose More > Unbind EIP in the Operation column.

   N/A

   EIP Type | Specifies the link type (BGP) when a new EIP is used. | Dynamic BGP
   Private IPv4 network configuration

   IPv4 Address

   Specifies how you want the IPv4 address to be assigned.
   - Automatically-assigned IP address: The system automatically assigns an IPv4 address to the load balancer.
   - Manually-specified IP address: Manually specify an IPv4 address to the load balancer.

   Automatically-assigned IP address

   Specification

   - Select either Application load balancing (HTTP/HTTPS) or Network load balancing (TCP/UDP) or both, and then select the desired specification. You can select only one specification for Application load balancing (HTTP/HTTPS) and Network load balancing (TCP/UDP), respectively.
   - For application load balancing, the number of IP addresses varies depending on the specification. You can view the number of IP addresses required by the load balancer in the infotip after the selected subnet.
   - The performance of load balancers varies depending on the selected specifications. You can evaluate the actual traffic and select appropriate specifications based on the key metrics.
   - Dedicated load balancers have the following six specifications:
     - Small I
     - Small II
     - Medium I
     - Medium II
     - Large I
     - Large II

   Medium II

   Name | Specifies the load balancer name. | elb93wd
   Description | Provides supplementary information about the load balancer. | N/A

   Tag

   Identifies load balancers so that they can be easily found. A tag consists of a tag key and a tag value. The tag key marks a tag, and the tag value specifies the tag content. For details about the naming specifications, see Table 2.

   - Key: elb_key1
   - Value: elb-01

   Table 2 Tag naming rules
   Item | Requirement | Example Value
   --- | --- | ---

   Tag key

   - Cannot be left blank.
   - Must be unique for the same load balancer.
   - Can contain a maximum of 36 characters.
   - Cannot contain asterisks (*), angle brackets (< and >), backslashes (\), equal signs (=), commas (,), vertical bars (|), or slashes (/).
   - Can contain only the following character types:
     - Uppercase letters
     - Lowercase letters
     - Digits
     - Special characters, including hyphens (-) and underscores (_)

   elb_key1

   Tag value

   - Can contain a maximum of 43 characters.
   - Cannot contain asterisks (*), angle brackets (< and >), backslashes (\), equal signs (=), commas (,), vertical bars (|), or slashes (/).
   - Can contain only the following character types:
     - Uppercase letters
     - Lowercase letters
     - Digits
     - Special characters, including hyphens (-) and underscores (_)

   elb-01

5. Click Create Now.
6. Confirm the configuration and submit your request.

Parent topic: Load Balancer