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    Cloud Enterprise Network:DescribeCenChildInstanceRouteEntries

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    Cloud Enterprise Network:DescribeCenChildInstanceRouteEntries

    Last Updated:Sep 11, 2026

    Invokes the DescribeCenChildInstanceRouteEntries operation to query the route entries of a network instance in a Cloud Enterprise Network (CEN) instance.

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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

    cen:DescribeCenChildInstanceRouteEntries

    get

    *CenInstance

    acs:cen:*:{#accountId}:ceninstance/{#ceninstanceId}

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    CenId

    string

    Yes

    The CEN instance ID.

    cen-7qthudw0ll6jmc****
    ChildInstanceId

    string

    Yes

    The network instance ID.

    vpc-bp18sth14qii3pnvo****
    ChildInstanceType

    string

    Yes

    The type of the network instance. Valid values:

    • VPC: virtual private cloud (VPC).

    • VBR: virtual border router (VBR).

    • CCN: Cloud Connect Network (CCN).

    • ECR: Express Connect Router (ECR).

    Valid values:

    • ECR :

      专线网关

    • VPN :

      VPN 网关

    • VBR :

      边界路由器

    • VPC :

      专有网络

    • CCN :

      云连接网

    VPC
    Status

    string

    No

    The status of the route entry. Valid values:

    • Active: active.

    • Candidate: candidate.

    • Rejected: rejected.

    • Prohibited: prohibited.

    • All (default): queries route entries in all states of the network instance.

    Active
    PageNumber

    integer

    No

    The page number. Default value: 1.

    1
    PageSize

    integer

    No

    The number of entries per page for paging queries. Default value: 10. Valid values: 1 to 500.

    10
    ChildInstanceRegionId

    string

    No

    The region ID of the network instance.

    You can call the DescribeChildInstanceRegions operation to obtain the region ID.

    cn-hangzhou
    ChildInstanceRouteTableId

    string

    No

    The routing table ID of the network instance. If you do not specify a routing table ID when querying route entries of a VPC-connected instance, the system queries route entries in the system routing table of the VPC-connected instance by default.

    vtb-p0wxx3apzgn6uqp3r****

    Response elements

    Element

    Type

    Description

    Example

    object

    PageSize

    integer

    The number of entries per page for paging queries.

    10
    RequestId

    string

    The request ID.

    17A57456-EF48-419D-9AE6-9B03D9996018
    PageNumber

    integer

    The page number.

    1
    TotalCount

    integer

    The total number of entries.

    4
    CenRouteEntries

    object

    CenRouteEntry

    array<object>

    The route entry information.

    array<object>

    Status

    string

    The status of the route entry. Valid values:

    • Active: active.

    • Candidate: candidate.

    • Rejected: rejected.

    • Prohibited: prohibited.

    Active
    Type

    string

    The destination type of the route entry. Valid values:

    • CEN: a route entry propagated through CEN.

    • System: a system route.

    • Custom: a custom route.

    CEN
    PublishStatus

    string

    The publish status of the route entry in CEN. Valid values:

    • Published: published.

    • NonPublished: not published.

    Published
    NextHopType

    string

    The next hop type of the route entry. Valid values:

    • Instance: ECS instance.

    • HaVip: high availability (HA) virtual IP address (HAVIP).

    • RouterInterface: router interface.

    • NetworkInterface: elastic network interface (ENI).

    • VpnGateway: VPN gateway.

    • IPv6Gateway: IPv6 gateway.

    • Ipv4Gateway: IPv4 gateway.

    • NatGateway: NAT gateway.

    • Attachment: network instance connection.

    • service: cloud service.

    • VBR: virtual border router (VBR).

    • CCN: Cloud Connect Network (CCN).

    • VPC: virtual private cloud (VPC).

    • local: The current route entry is a system route of the network instance and has no next hop.

    • TR: transit router.

    • BlackHole: The current route entry is a blackhole route and has no next hop.

    • EcRouterInterface: Express Connect router interface.

    • HealthCheck: health check.

    • AS: CCN access gateway.

    • classicLink: classic network instance.

    • GatewayEndpoint: gateway endpoint.

    • CPE: on-premises data center connected to the VBR.

    VBR
    OperationalMode

    boolean

    Indicates whether the route entry can be published to or withdrawn from CEN. Valid values:

    • true: The route entry can be published or withdrawn.

    • false: The route entry cannot be published or withdrawn.

    true
    NextHopRegionId

    string

    The region ID of the instance associated with the next hop of the route entry.

    cn-hangzhou
    NextHopInstanceId

    string

    The ID of the instance associated with the next hop of the routing entry.

    vbr-bp13gtbhdp0pfqg6s****
    DestinationCidrBlock

    string

    The destination CIDR block of the route entry.

    10.0.0.0/24
    RouteTableId

    string

    The route table ID.

    vtb-bp1r9pvl4xen8s9ju****
    CenRouteMapRecords

    object

    CenRouteMapRecord

    array<object>

    The routing policy information matched by the route entry.

    object

    RouteMapId

    string

    The routing policy ID.

    cenrmap-w4yf7toozfol3q****
    RegionId

    string

    The region ID where the routing policy is applied.

    cn-hangzhou
    Conflicts

    object

    Conflict

    array<object>

    The information about the conflicting route entry.

    object

    Status

    string

    The cause of the route entry conflict. Valid values:

    • conflict: The route entries have the same destination CIDR block.

    • overflow: The number of route entries in the route table of another network instance exceeds the limit.

    conflict
    DestinationCidrBlock

    string

    The destination CIDR block of the conflicting route entry.

    192.168.1.0/24
    InstanceId

    string

    The network instance ID of the peer that has the conflicting routing entry.

    ccn-0q3b7oviikmm9h****
    InstanceType

    string

    The type of the peer network instance that has the conflicting route entry. Valid values:

    • VPC: virtual private cloud (VPC).

    • VBR: virtual border router (VBR).

    • CCN: Cloud Connect Network (CCN).

    • ECR: Express Connect Router (ECR).

    CCN
    RegionId

    string

    The region ID of the peer network instance that has the conflicting route entry.

    ccn-cn-shanghai
    Communities

    object

    Community

    array

    The list of Community attribute values of the route entry.

    string

    The Community attribute value of the route entry.

    65501:1
    AsPaths

    object

    AsPath

    array

    The list of AS Path attribute values of the route entry.

    string

    The AS Path attribute value of the route entry.

    65501

    Examples

    Success response

    JSON format

    {
  "PageSize": 10,
  "RequestId": "17A57456-EF48-419D-9AE6-9B03D9996018",
  "PageNumber": 1,
  "TotalCount": 4,
  "CenRouteEntries": {
    "CenRouteEntry": [
      {
        "Status": "Active",
        "Type": "CEN",
        "PublishStatus": "Published",
        "NextHopType": "VBR",
        "OperationalMode": true,
        "NextHopRegionId": "cn-hangzhou",
        "NextHopInstanceId": "vbr-bp13gtbhdp0pfqg6s****",
        "DestinationCidrBlock": "10.0.0.0/24",
        "RouteTableId": "vtb-bp1r9pvl4xen8s9ju****",
        "CenRouteMapRecords": {
          "CenRouteMapRecord": [
            {
              "RouteMapId": "cenrmap-w4yf7toozfol3q****",
              "RegionId": "cn-hangzhou"
            }
          ]
        },
        "Conflicts": {
          "Conflict": [
            {
              "Status": "conflict",
              "DestinationCidrBlock": "192.168.1.0/24",
              "InstanceId": "ccn-0q3b7oviikmm9h****",
              "InstanceType": "CCN",
              "RegionId": "ccn-cn-shanghai"
            }
          ]
        },
        "Communities": {
          "Community": [
            "65501:1"
          ]
        },
        "AsPaths": {
          "AsPath": [
            "65501"
          ]
        }
      }
    ]
  }
}

    Error codes

    HTTP status code

    Error code

    Error message

    Description
    400 InvalidParameter Invalid parameter. The error message returned because the parameter is set to an invalid value.
    400 Unauthorized The AccessKeyId is unauthorized. The error message returned because you do not have the permissions to perform this operation.
    404 InvalidRouteTableId.NotFound The specified RouteTableId is not found. The specified route table ID does not exist.

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.