# Querying Routers

#### Function

This API is used to query all routers accessible to the tenant submitting the request.

#### URI

GET /v2.0/routers

Example:

    GET https://{Endpoint}/v2.0/routers?id={id}&name={name}&admin_state_up={admin_state_up}&tenant_id={tenant_id}&status={status}

Example of querying routers by page

    GET https://{Endpoint}/v2.0/routers?limit=2&marker=01ab4be1-4447-45fb-94be-3ee787ed4ebe&page_reverse=False

Table 1 describes the parameters.

Table 1 Parameter description
Name | Mandatory | Type | Description
--- | --- | --- | ---
id | No | String | Specifies that the router ID is used as the filtering condition.
admin_state_up | No | Boolean | Specifies that the admin state is used as the filtering condition. The value can be true or false.
status | No | String | Specifies that the router status is used as the filtering condition. The value can be ACTIVE, DOWN, or ERROE.
tenant_id | No | String | Specifies that the project ID is used as the filtering condition.

marker

No

String

Specifies a resource ID for pagination query, indicating that the query starts from the next record of the specified resource ID.

This parameter can work together with the parameter limit.

- If parameters marker and limit are not passed, all resource records will be returned.
- If the parameter marker is not passed and the value of parameter limit is set to 10, the first 10 resource records will be returned.
- If the value of the parameter marker is set to the resource ID of the 10th record and the value of parameter limit is set to 10, the 11th to 20th resource records will be returned.
- If the value of the parameter marker is set to the resource ID of the 10th record and the parameter limit is not passed, resource records starting from the 11th records (including 11th) will be returned.

limit | No | Integer | Specifies the number of records that will be returned on each page. The value is from 0 to intmax. limit can be used together with marker. For details, see the parameter description of marker.

#### Request Message

None

#### Response Message

Table 2 Response parameter
Parameter | Type | Description
--- | --- | ---
routers | Array of router objects | Specifies the router list. For details, see Table 3.
routers_links | Array of routers_link objects | Specifies the pagination information. For details, see Table 6. The value of rel will be next and that of href will be a link only when limit is used for filtering and the number of resources exceeds the value of limit or 2000 (default value of limit).

Table 3 router objects
Attribute | Type | Description
--- | --- | ---
id | String | Specifies the router ID. This parameter is not mandatory when you query routers.
name | String | Specifies the router name. The name can contain only letters, digits, underscores (_), hyphens (-), and periods (.).
admin_state_up | Boolean | Specifies the administrative status. The value can only be true.
status | String | Specifies the router status. The value can be ACTIVE, DOWN, or ERROR.
tenant_id | String | Specifies the project ID.
external_gateway_info | external_gateway_info object | Specifies the external gateway. This is an extended attribute. For details, see the external_gateway_info objects.
routes | Array of route objects | Specifies a route list. This is an extended attribute. For details, see Table 5.
project_id | String | Specifies the project ID.
created_at | String | Specifies the time (UTC) when the router is created. Format: yyyy-MM-ddTHH:mm:ss
updated_at | String | Specifies the time (UTC) when the router is updated. Format: yyyy-MM-ddTHH:mm:ss

Table 4 external_gateway_info objects
Attribute | Type | Description
--- | --- | ---
network_id | String | Specifies the UUID of the external network. You can use GET /v2.0/networks?router:external=True or run the neutron net-external-list command to query information about the external network.
enable_snat | Boolean | Specifies whether the SNAT function is enabled. The default value is false.

Table 5 route objects
Attribute | Type | Description
--- | --- | ---
destination | String | Specifies the IP address range.
nexthop | String | Specifies the next hop IP address. The IP address can only be one in the subnet associated with the router.

Table 6 routers_link object
Name | Type | Description
--- | --- | ---
href | String | Specifies the API link.
rel | String | Specifies the relationship between the API link and the API version.

#### Example

Example request

    GET https://{Endpoint}/v2.0/routers?limit=1

Example response

    {
        "routers": [
            {
                "id": "01ab4be1-4447-45fb-94be-3ee787ed4ebe",
                "name": "xiaoleizi-tag",
                "status": "ACTIVE",
                "tenant_id": "bbfe8c41dd034a07bebd592bf03b4b0c",
                "project_id": "bbfe8c41dd034a07bebd592bf03b4b0c",
                "admin_state_up": true,
                "external_gateway_info": {
                    "network_id": "0a2228f2-7f8a-45f1-8e09-9039e1d09975",
                    "enable_snat": false
                },
                "routes": [
                    {
                        "destination": "0.0.0.0/0",
                        "nexthop": "172.16.0.124"
                    }
                ],
                "created_at": "2018-03-23T09:26:08",
                "updated_at": "2018-08-24T08:49:53"
            }
        ],
        "routers_links": [
           {
                "rel": "next",
                "href": "https://{Endpoint}/v2.0/routers?limit=1&marker=01ab4be1-4447-45fb-94be-3ee787ed4ebe"
            },
           {    "rel": "previous",
                "href": "https://{Endpoint}/v2.0/routers?limit=1&marker=01ab4be1-4447-45fb-94be-3ee787ed4ebe&page_reverse=True"
            }
        ]
    }

#### Status Code

See Status Codes.

#### Error Code

See Error Codes.

Parent topic: Router