Modify the configurations of a UDP listener.

Request parameters

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

SetLoadBalancerUDPListenerAttribute
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.
ListenerPort Integer Yes The frontend port of the listener that is used to receive incoming traffic and distribute the traffic to the backend servers.

[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 value:
  • -1: The peak bandwidth is not limited.
  • [1-5000]: The peak bandwidth of the listener. The sum of the peak bandwidths of all listeners under an instance cannot exceed the bandwidth of that instance.
Scheduler String  No The algorithm used to distribute traffic. Valid value:
  • wrr (Default): 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. When the weight value is the same, a backend server with a smaller number of connections is more frequently (and probably) accessed.
  • 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.
  • qch: The consistent hash based on the QUIC Connection ID. The same QUIC Connection IDs are scheduled to the same backend servers.
Note Only guaranteed-performance instances support sch, tch and qch consistent hash.
AclStatus String  No Whether to enable access control.

Valid value: on | off (default)
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.

HealthCheckConnectPort Integer No  The port used for health check. Valid value:

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 mode server on the same ECS instance (from failure to success).

Valid value: 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 (from success to failure).

Valid value: 2-10
HealthCheckConnectTimeout Integer No  The amount of time in seconds to wait for the response from a health check. If an ECS instance sends no response within the specified timeout period, the health check fails.

Valid value: 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 value: 1-50 (seconds)
HealthCheckReq String  No Request string for UDP listener health check. Only English letters, digits are allowed. Up to 500 characters can be entered.
HealthCheckExp String  No Response string for UDP listener check. Only English letters, digits are allowed. Up to 500 characters can be entered.
VServerGroup String  No Whether to use a VServer group.

Valid value: on | off (default)

Note The value of VserverGroup and the value of MasterSlaveServerGroup cannot be on at the same time.
MasterSlaveServerGroupId String  No Whether to use an active/standby server group.

Valid value: on | off (default)

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=SetLoadBalancerUDPListenerAttribute
&LoadBalancerId=lb-t4nj5vuz8ish9emfk1f20
&ListenerPort=443
&Bandwidth=-1
&VServerGroupId=rsp-cige6j5e7p
&CommonParameters
Response example

  • XML format

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

  • JSON format

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