Modify the configurations of a TCP listener.

Request parameters

Name Type Required Description
Action String  Yes The action to perform. Valid value: 

SetLoadBalancerTCPListenerAttribute

RegionId String Yes The region of the SLB instance.

You can obtain the region ID by calling the DescribeRegions API.

LoadBalancerId String Yes The ID of the SLB instance for which the TCP listener is created.
ListenerPort Integer Yes The frontend port of the listener that is used to receive incoming traffic and distribute the traffic to the backend servers. Valid values:

1-65535

VServerGroupId String No The ID of the VServer group.
MasterSlaveServerGroupId  String No The ID of the active/standby server group.
Note The VServerGroupId parameter and the MasterSlaveServerGroupId parameter cannot be specified at the same time.
Bandwidth Integer Yes The peak bandwidth of the listener. Valid values:
  • -1: The peak bandwidth is not limited.
  • [1-5000]: The peak bandwidth of the listener. The total peak bandwidth for all listeners cannot exceed the peak bandwidth for the instance.
Scheduler String No The algorithm used to distribute traffic. Valid values:
  • wrr: Backend servers with higher weights receive more requests than those with smaller weights.
  • wlc: A server with a higher weight will receive a larger percentage of live connections at any one time. If the weights are the same, the system directs network connections to the server with the fewest established connections.
  • rr: Requests are evenly and sequentially distributed to the backend servers.
  • sch: The consistent hash based on the source IP address. The same source IP addresses are scheduled to the same backend server. 
  • tch: The consistent hash based on the quaternion (source IP + destination IP + source port + destination port). The same steams are scheduled to the same backend server.
Note Only guaranteed-performance instances support sch and tch consistent hash.
PersistenceTimeout Integer No The timeout value of the session persistence.

Valid values: 0-3600 (seconds)

EstablishedTimeout Integer No The timeout value in seconds of the TCP connection.

Valid values: 10-900 (seconds)

AclStatus String No Whether to enable access control.

Valid values: on | off

AclType String No Select an access control method after enabling the access control function:
  • white: Only requests from IP addresses or CIDR blocks in the selected access control lists are forwarded. It applies to scenarios where the application only allows access from some specific IP addresses.

    Enabling whitelist poses some business risks. After a whitelist is configured, only the IP addresses in the list can access the listener. If you enable the whitelist without adding any IP entry in the corresponding access control list, all requests are forwarded.

  • black: Requests from IP addresses or CIDR blocks in the selected access control lists are not forwarded. It applies to scenarios where the application only denies access from some specific IP addresses.

    If you enable a blacklist without adding any IP entry in the corresponding access control list, all requests are forwarded.

This parameter is required when the value of the AclStatus parameter is set to on.

AclId String No Select an access control list as the whitelist or the blacklist.

This parameter is required if the value of the AclStatus parameter is on.

HealthCheckType String No Select a health check method.

Valid values: tcp | http

HealthCheckDomain String No The domain name used for health check. Valid value:
  • $_ip: The private IP of the backend server. When the $_ip is specified or the health check domain is not specified, Server Load Balancer uses private IPs of backend servers as the domain names for health check.
  • domain: The domain name can be 1-80 characters in length, and can only contain letters, numbers, periods, or hyphens.
Note This parameter is not required when the TCP health check method is used.
HealthCheckURI String No The URI used for health check.
Note This parameter is not required when the TCP health check method is used.
HealthCheckConnectPort Integer No The port used for health check. Valid values:
  • 1-65535: The port opened on the backend server to do health check.
HealthyThreshold Integer No The number of consecutive successes of health check performed by the same LVS node server on the same ECS instance before the ECS instance is declared as healthy (from failure to success).

Valid values: 2-10

UnhealthyThreshold Integer No The number of consecutive failures of health check performed by the same LVS node server on the same ECS instance before the ECS instance is declared as unhealthy (from success to failure).

Valid values: 2-10

HealthCheckConnectTimeout Integer No

The amount of time to wait for the response from the health check. If the backend ECS instance does not make correct response in the specified time, the health check fails.

Valid values: 1-300 (seconds)

Note If the value of the HealthCheckInterval parameter is greater than the value of the HealthCHeckTimeout parameter, the HealthCHeckTimeout parameter is invalid, and the timeout is set to the value of the HealthCheckInterval parameter.
HealthCheckInterval Integer No

The time interval between two consecutive health checks.

Valid values: 1-50 (seconds)

HealthCheckHttpCode String No

The HTTP status code indicating that the health check is normal. Separate multiple HTTP status codes by commas.

Valid values: http_2xx | http_3xx | http_4xx | http_5xx

SynProxy String No Whether to enable SynProxy. SynProxy protects SLB from attacks.

We recommend that you do not adjust this parameter and use the value set by SLB.

VServerGroup String No Whether to use a VServer group.

Valid values: on | off

Note The value of VserverGroup and the value of MasterSlaveServerGroup cannot be on at the same time.
PersistenceTimeout Integer No The timeout value of the session persistence.

Valid values: 0-3600 (seconds)

MasterSlaveServerGroupId Whether to use an active/standby server group.

Valid values: on | off

Note The value of VserverGroup and the value of MasterSlaveServerGroup cannot be on at the same time.

Response parameters

Name  Type Description
RequestId String  The ID of the request.

Examples

Request example

https://slb.aliyuncs.com/?Action=SetLoadBalancerTCPListenerAttribute
&LoadBalancerId=lb-t4nj5vuz8ish9emfk1f20
&ListenerPort=443
&Bandwidth=-1
&VServerGroupId=rsp-cige6j5e7p
&CommonParameters
Response example
  • XML format

    <? xml version="1.0" encoding="UTF-8"? >
    <SetLoadBalancerTCPListenerAttributeResponse>
    	<RequestId>CEF72CEB-54B6-4AE8-B225-F876FF7BA984</RequestId>
    </SetLoadBalancerTCPListenerAttributeResponse>
  • JSON format

    {
      "RequestId": " CEF72CEB-54B6-4AE8-B225-F876FF7BA984"
    }