Querying Subnets

Function

This API is used to query all subnets accessible to the tenant submitting the request. A maximum of 2000 records can be returned for each query operation. If the number of records exceeds 2000, the pagination marker will be returned. For details, see section Pagination.

URI

GET /v2.0/subnets

Example:

GET https://{Endpoint}/v2.0/subnets?name={subnet_name}&ip_version={ip_version}&network_id={network_id}&cidr={subnet_cidr_address}&gateway_ip={subnet_gateway}&tenant_id={tenant_id}&enable_dhcp={is_enable_dhcp}

Example of querying networks by page

GET https://{Endpoint}/v2.0/subnets?limit=2&marker=011fc878-5521-4654-a1ad-f5b0b5820302&page_reverse=False

Table 1 describes the parameters.

**Table 1** Parameter description
Name	Mandatory	Type	Description
id	No	String	Specifies that the ID is used as the filtering condition.
name	No	String	Specifies that the subnet name is used as the filtering condition.
enable_dhcp	No	Boolean	Specifies whether DHCP is enabled for the subnet is used as the filtering condition. The value can be true or false.
cidr	No	String	Specifies that the CIDR block is used as the filtering condition.
network_id	No	String	Specifies that the network ID is used as the filtering condition.
ip_version	No	String	Specifies that the IP address version is used as the filtering condition.
gateway_ip	No	String	Specifies that the gateway IP address is used as the filtering condition.
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, resource records on the first page 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 (2^31-1). The default value is 2000. limit can be used together with marker. For details, see the parameter description of marker.

Request Parameters

None

Example Request

Example 1

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

Example 2

GET https://{Endpoint}/v2.0/subnets?id=011fc878-5521-4654-a1ad-f5b0b5820322

Response Parameters

**Table 2** Response parameter
Parameter	Type	Description
subnets	Array of subnet objects	Specifies the subnet list. For details, see Table 3.
subnets_links	Array of subnets_link objects	Specifies the pagination information. For details, see Table 6. Only when limit is used for filtering and the number of resources exceeds the value of limit or 2000 (default value of limit), value next will be returned for rel and a link for href.

**Table 3** **subnet** objects
Attribute	Type	Description
id	String	Specifies the subnet ID. This parameter is not mandatory when you query subnets.
name	String	Specifies the subnet name.
ip_version	Integer	Specifies the IP address version. The value can be 4 (IPv4) or 6 (IPv6).
ipv6_address_mode	String	Specifies the IPv6 addressing mode. Only dhcpv6-stateful is supported.
ipv6_ra_mode	String	Specifies the IPv6 route broadcast mode. Only dhcpv6-stateful is supported.
network_id	String	Specifies the ID of the network to which the subnet belongs.
cidr	String	Specifies the CIDR format. Only the IPv4 addresses in the 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 ranges are supported. The subnet mask cannot be greater than 28. This parameter cannot be set if the value of ip_version is 6.
gateway_ip	String	The gateway IP address cannot conflict with IP addresses configured for allocation_pools. This attribute cannot be modified.
allocation_pools	Array of allocation_pool objects	Specifies available IP address pools. For details, see Table 4. Example: [ { "start": "10.0.0.2", "end": "10.0.0.251"} ] The last three and the first IP addresses in each subnet are the ones reserved by the system. For example, in IPv4 subnet 192.168.1.0/24, IP addresses 192.168.1.0, 192.168.1.253, 192.168.1.254, and 192.168.1.255 are reserved by the system. [{"start": "2001:db8:a583:9::2", "end": "2001:db8:a583:9:ffff:ffff:ffff:fffc"}] In IPv6 subnet 2001:db8:a583:9::/64, IP addresses 2001:db8:a583:9::1, 2001:db8:a583:9:ffff:ffff:ffff:fffd, 2001:db8:a583:9:ffff:ffff:ffff:fffe, and 2001:db8:a583:9:ffff:ffff:ffff:ffff are reserved by the system. By default, the IP addresses reserved by the system are not in the IP address pool specified by allocation_pool. When updating an IP address pool, the allocation_pool value can contain neither gateway nor broadcast IP addresses.
dns_nameservers	Array of strings	Specifies the DNS server address. Example: "dns_nameservers": ["8.xx.xx.8","8.xx.xx.4"]
host_routes	Array of host_route objects	Specifies the static VM routes. For details, see Table 5. Static routes are not supported, and entered information will be ignored.
tenant_id	String	Specifies the project ID.
enable_dhcp	Boolean	Specifies whether to enable the DHCP function. Value false indicates that the DHCP function is not enabled. The value can only be true.
project_id	String	Specifies the project ID. For details about how to obtain a project ID, see Obtaining a Project ID.
created_at	String	Specifies the time (UTC) when the subnet is created. Format: yyyy-MM-ddTHH:mm:ss
updated_at	String	Specifies the time (UTC) when the subnet is updated. Format: yyyy-MM-ddTHH:mm:ss

**Table 4** **allocation_pool** objects
Parameter	Type	Description
start	String	Specifies the start IP address of a network pool.
end	String	Specifies the end IP address of a network pool.

**Table 5** **host_route** objects
Parameter	Type	Description
destination	String	Specifies the destination subnet of a route.
nexthop	String	Specifies the next-hop IP address of a route.

**Table 6** **subnets_link** object
Parameter	Type	Description
href	String	Specifies the API link.
rel	String	Specifies the relationship between the API link and the API version.

Example Response

Example 1

{
    "subnets": [
        {
            "name": "kesmdemeet",
            "cidr": "172.16.236.0/24",
            "id": "011fc878-5521-4654-a1ad-f5b0b5820302",
            "enable_dhcp": true,
            "network_id": "48efad0c-079d-4cc8-ace0-dce35d584124",
            "tenant_id": "bbfe8c41dd034a07bebd592bf03b4b0c",
            "project_id": "bbfe8c41dd034a07bebd592bf03b4b0c",
            "dns_nameservers": [],
            "allocation_pools": [
                {
                    "start": "172.16.236.2",
                    "end": "172.16.236.251"
                }
            ],
            "host_routes": [],
            "ip_version": 4,
            "gateway_ip": "172.16.236.1",
            "created_at": "2018-03-26T08:23:43",
            "updated_at": "2018-03-26T08:23:44"
        }
    ],
    "subnets_links": [
       {
            "rel": "next", 
            "href": "https://{Endpoint}/v2.0/subnets?limit=1&marker=011fc878-5521-4654-a1ad-f5b0b5820302"
        }, 
       {    "rel": "previous", 
            "href": "https://{Endpoint}/v2.0/subnets?limit=1&marker=011fc878-5521-4654-a1ad-f5b0b5820302&page_reverse=True"
        }
    ]
}

Example 2

{
    "subnets": [
        {
	    "id": "011fc878-5521-4654-a1ad-f5b0b5820322",
	    "name": "elb_alpha_vpc0_subnet0_172_16_0_0_24",
	    "tenant_id": "0c55e5b2b100d5202ff6c01a2fac4580",
	    "network_id": "3053b502-11b2-4599-bcf4-d9d06b6118b2",
            "ip_version": 6,
	    "cidr": "2001:db8:a583:a0::/64",
            "subnetpool_id": "cb03d100-8687-4c0a-9441-ea568dcae47d",
	    "allocation_pools": [{
	        "start": "2001:db8:a583:a0::2",
		"end": "2001:db8:a583:a0:ffff:ffff:ffff:fffc"
	    }],
	    "gateway_ip": "2001:db8:a583:a0::1",
	    "enable_dhcp": true,
	    "ipv6_ra_mode": "dhcpv6-stateful",
	    "ipv6_address_mode": "dhcpv6-stateful",
	    "description": "",
	    "dns_nameservers": [],
	    "host_routes": [],
	    "project_id": "0c55e5b2b100d5202ff6c01a2fac4580",
	    "created_at": "2021-07-01T07:59:28",
	    "updated_at": "2021-07-01T07:59:28"
        }
    ],
    "subnets_links": [
       {    "rel": "previous", 
            "href": "https://{Endpoint}/v2.0/subnets?limit=1&id=011fc878-5521-4654-a1ad-f5b0b5820322&marker=011fc878-5521-4654-a1ad-f5b0b5820302&page_reverse=True"
        }
    ]
}