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VPN Gateway:DiagnoseVpnConnections

Last Updated:Aug 28, 2026

Diagnoses IPsec-VPN connections.

Operation description

  • For single-tunnel mode, the VpnConnectionIds request parameter is required.

  • For dual-tunnel mode, the TunnelIds request parameter is required.

  • If the IPsec-VPN connection is faulty, the operation returns an error code (FailedReasonCode) and a log (SourceLog) for troubleshooting. For more information, see Common errors and troubleshooting methods for IPsec-VPN connections.

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Test

RAM authorization

No authorization for this operation. If you encounter issues with this operation, contact technical support.

Request parameters

Parameter

Type

Required

Description

Example

RegionId

string

Yes

The region ID of the IPsec-VPN connection.

You can call the DescribeRegions operation to query the most recent region list.

cn-qingdao

VpnGatewayId

string

No

The ID of the VPN gateway.

vpn-bp10hz6b0mbp39flt****

VpnConnectionIds

array

No

The IDs of IPsec-VPN connections.

string

No

The ID of the IPsec-VPN connection.

Note

This parameter is required if the IPsec-VPN connection is in single-tunnel mode.

vco-bp1spxu8hlcvpd7ry****

TunnelIds

array

No

The list of tunnel IDs.

string

No

The tunnel ID.

Note

This parameter is required if the IPsec-VPN connection is in dual-tunnel mode.

tun-64n1sr9dig64k6****

PageNumber

integer

No

The page number. Default value: 1.

1

PageSize

integer

No

The number of entries per page. Default value: 10.

10

Response elements

Element

Type

Description

Example

object

The response parameters.

RequestId

string

The request ID.

B8094E1E-935B-1397-96A8-4F87A5D1BF29

PageNumber

integer

The page number.

1

PageSize

integer

The number of entries per page.

10

TotalCount

integer

The number of entries returned.

1

VpnConnections

array<object>

The diagnostic information.

object

MismatchRemoteParam

string

The mismatched parameter value on the peer gateway device. Returned when the IPsec-VPN connection and the peer gateway device have different parameter configurations.

SHA

MismatchLocalParam

string

The mismatched parameter value on the IPsec-VPN connection side. Returned when the IPsec-VPN connection and the peer gateway device have different parameter configurations.

SHA256

VpnConnectionId

string

The ID of the IPsec-VPN connection.

vco-bp1spxu8hlcvpd7ry****

SourceLog

string

The error log.

2023-01-13 11:39:21 vco-bp1spxu8hlcvpd7ry**** [PROTO_ERR]: ikev1.c:1433:isakmp_ph1resend(): phase1 negotiation failed due to time up. [{remote id:4}{ph1: 172.16.0.88[500] <=> 192.168.0.206[500], 172.16.0.88 <=> 192.168.0.206}]

FailedReasonCode

string

The error code.

Phase1NegotiationTimeout

FailedTime

integer

The UNIX timestamp, in milliseconds, when the error occurred on the IPsec-VPN connection.

1673581161000

FailedReason

string

The cause of the error.

Phase1 negotiation timeout

Severity

string

The error level. Valid values:

  • Critical

  • Warn

  • Normal

Warn

TunnelId

string

The tunnel ID.

tun-64n1sr9dig64k6****

Examples

Success response

JSON format

{
  "RequestId": "B8094E1E-935B-1397-96A8-4F87A5D1BF29",
  "PageNumber": 1,
  "PageSize": 10,
  "TotalCount": 1,
  "VpnConnections": [
    {
      "MismatchRemoteParam": "SHA",
      "MismatchLocalParam": "SHA256",
      "VpnConnectionId": "vco-bp1spxu8hlcvpd7ry****",
      "SourceLog": "2023-01-13 11:39:21 vco-bp1spxu8hlcvpd7ry**** [PROTO_ERR]: ikev1.c:1433:isakmp_ph1resend(): phase1 negotiation failed due to time up. [{remote id:4}{ph1: 172.16.0.88[500] <=> 192.168.0.206[500], 172.16.0.88 <=> 192.168.0.206}]",
      "FailedReasonCode": "Phase1NegotiationTimeout",
      "FailedTime": 1673581161000,
      "FailedReason": "Phase1 negotiation timeout",
      "Severity": "Warn",
      "TunnelId": "tun-64n1sr9dig64k6****"
    }
  ]
}

Error codes

HTTP status code

Error code

Error message

Description

400 InvalidParameter The parameter is invalid.
403 Forbidden User not authorized to operate on the specified resource. You do not have the permissions to manage the specified resource. Apply for the permissions and try again.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.