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ENS:DescribeLoadBalancerListenMonitor

Last Updated:Mar 27, 2026

Queries monitoring data of an edge load balancer (ELB) instance.

Operation description

  • up to 100 times per second per account.

  • up to 10 times per second per user.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

ens:DescribeLoadBalancerListenMonitor

none

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

StartTime

string

Yes

The beginning of the time range to query.

2024-01-15 16:00:00

EndTime

string

Yes

The end of the time range to query.

2024-01-30 08:00:00

LoadBalancerId

string

Yes

The ID of the ELB instance.

lb-5q73cv04zeyh43lh74lp4****

VPort

string

Yes

The virtual IP address (VIP) port of the ELB instance.

80

Proto

string

No

The network protocol, such as tcp or udp.

tcp

Response elements

Element

Type

Description

Example

object

Schema of Response.

RequestId

string

Id of the request.

C0003E8B-B930-4F59-ADC0-0E209A9012A8

LoadBalancerMonitorListenData

array<object>

The TCP/UDP monitoring data of the ELB instance.

object

The monitoring data.

LoadBalancerId

string

The ID of the ELB instance.

lb-5q73cv04zeyh43lh74lp4****

EnsRegionId

string

The ID of the node to which the ELB instance belongs.

cn-dongguan-9

Vip

string

The virtual IP address (VIP) of the instance.

10.8.****

Vni

string

The ID of the tunnel.

53284

VPort

string

The VIP port of the ELB instance.

80

Proto

string

The network protocol.

tcp

Conns

string

The number of new connections.

37150

ActConns

string

The number of active connections.

80285

InActConns

string

The number of inactive connections.

16322

DropConns

string

The number of dropped connections.

10

InPkts

string

The number of inbound packets.

12

OutPkts

string

The number of outbound packets.

34

InDropPkts

string

The number of dropped inbound packets.

27

OutDropPkts

string

The number of dropped outbound packets.

76

InBytes

string

The inbound traffic.

67532

OutBytes

string

The outbound traffic.

5155487

InDropBytes

string

The dropped inbound traffic.

324

OutDropBytes

string

The dropped outbound traffic.

0

ValidRsNum

string

The number of available servers that are attached to the monitored ELB instance.

2

InValidRsNum

string

The number of unavailable servers that are attached to the monitored ELB instance.

0

BizTime

string

The business time.

2024-01-15 16:03:00

Examples

Success response

JSON format

{
  "RequestId": "C0003E8B-B930-4F59-ADC0-0E209A9012A8",
  "LoadBalancerMonitorListenData": [
    {
      "LoadBalancerId": "lb-5q73cv04zeyh43lh74lp4****",
      "EnsRegionId": "cn-dongguan-9",
      "Vip": "10.8.****",
      "Vni": "53284",
      "VPort": "80",
      "Proto": "tcp",
      "Conns": "37150",
      "ActConns": "80285",
      "InActConns": "16322",
      "DropConns": "10",
      "InPkts": "12",
      "OutPkts": "34",
      "InDropPkts": "27",
      "OutDropPkts": "76",
      "InBytes": "67532",
      "OutBytes": "5155487",
      "InDropBytes": "324",
      "OutDropBytes": "0",
      "ValidRsNum": "2",
      "InValidRsNum": "0",
      "BizTime": "2024-01-15 16:03:00"
    }
  ]
}

Error codes

HTTP status code

Error code

Error message

Description

400 NoPermission Permission denied.
400 InvalidParameter.%s The specified field %s invalid. Please check it again.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.