# Source: https://docs.datadoghq.com/ddsql_reference/data_directory/gcp/gcp.compute_subnetwork.dataset.md

---
title: Subnetworks
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > DDSQL Reference > Data Directory > Subnetworks
---

# Subnetworks

Subnetworks in Google Cloud are regional resources that define IP address ranges within a Virtual Private Cloud (VPC) network. They allow you to segment and organize resources, control IP allocation, and manage traffic flow. Each subnetwork is associated with a specific region and can host resources like virtual machine instances.

```
gcp.compute_subnetwork
```

## Fields

| Title                      | ID   | Type          | Data Type                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | Description |
| -------------------------- | ---- | ------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------- |
| _key                       | core | string        |
| ancestors                  | core | array<string> |
| creation_timestamp         | core | timestamp     | Output only. [Output Only] Creation timestamp inRFC3339 text format.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| datadog_display_name       | core | string        |
| description                | core | string        | An optional description of this resource. Provide this property when you create the resource. This field can be set only at resource creation time.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| enable_flow_logs           | core | bool          | Whether to enable flow logging for this subnetwork. If this field is not explicitly set, it will not appear in get listings. If not set the default behavior is determined by the org policy, if there is no org policy specified, then it will default to disabled. This field isn't supported if the subnet purpose field is set toREGIONAL_MANAGED_PROXY. It is recommended to uselogConfig.enable field instead.                                                                                                                                                                                                         |
| external_ipv6_prefix       | core | string        | The external IPv6 address range that is owned by this subnetwork.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| gateway_address            | core | string        | Output only. [Output Only] The gateway address for default routes to reach destination addresses outside this subnetwork.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| id                         | core | string        | Output only. [Output Only] The unique identifier for the resource. This identifier is defined by the server.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| internal_ipv6_prefix       | core | string        | The internal IPv6 address range that is owned by this subnetwork.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| ip_cidr_range              | core | string        | The range of internal addresses that are owned by this subnetwork. Provide this property when you create the subnetwork. For example,10.0.0.0/8 or 100.64.0.0/10. Ranges must be unique and non-overlapping within a network. Only IPv4 is supported. This field is set at resource creation time. The range can be any range listed in theValid ranges list. The range can be expanded after creation usingexpandIpCidrRange.                                                                                                                                                                                               |
| ip_collection              | core | string        | Reference to the source of IP, like a PublicDelegatedPrefix (PDP) for BYOIP. The PDP must be a sub-PDP in EXTERNAL_IPV6_SUBNETWORK_CREATION or INTERNAL_IPV6_SUBNETWORK_CREATION mode. Use one of the following formats to specify a sub-PDP when creating a dual stack or IPv6-only subnetwork with external access using BYOIP: - Full resource URL, as inhttps://www.googleapis.com/compute/v1/projects/projectId/regions/region/publicDelegatedPrefixes/sub-pdp-name - Partial URL, as in - projects/projectId/regions/region/publicDelegatedPrefixes/sub-pdp-name - regions/region/publicDelegatedPrefixes/sub-pdp-name |
| ipv6_access_type           | core | string        | The access type of IPv6 address this subnet holds. It's immutable and can only be specified during creation or the first time the subnet is updated into IPV4_IPV6 dual stack.                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| ipv6_cidr_range            | core | string        | Output only. [Output Only] This field is for internal use.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| ipv6_gce_endpoint          | core | string        | Output only. [Output Only] Possible endpoints of this subnetwork. It can be one of the following: - VM_ONLY: The subnetwork can be used for creating instances and IPv6 addresses with VM endpoint type. Such a subnetwork gets external IPv6 ranges from a public delegated prefix and cannot be used to create NetLb. - VM_AND_FR: The subnetwork can be used for creating both VM instances and Forwarding Rules. It can also be used to reserve IPv6 addresses with both VM and FR endpoint types. Such a subnetwork gets its IPv6 range from Google IP Pool directly.                                                   |
| kind                       | core | string        | Output only. [Output Only] Type of the resource. Always compute#subnetwork for Subnetwork resources.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| labels                     | core | array<string> |
| log_config                 | core | json          | This field denotes the VPC flow logging options for this subnetwork. If logging is enabled, logs are exported to Cloud Logging.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| name                       | core | string        | The name of the resource, provided by the client when initially creating the resource. The name must be 1-63 characters long, and comply withRFC1035. Specifically, the name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?` which means the first character must be a lowercase letter, and all following characters must be a dash, lowercase letter, or digit, except the last character, which cannot be a dash.                                                                                                                                                              |
| network                    | core | string        | The URL of the network to which this subnetwork belongs, provided by the client when initially creating the subnetwork. This field can be set only at resource creation time.                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| organization_id            | core | string        |
| parent                     | core | string        |
| private_ip_google_access   | core | bool          | Whether the VMs in this subnet can access Google services without assigned external IP addresses. This field can be both set at resource creation time and updated using setPrivateIpGoogleAccess.                                                                                                                                                                                                                                                                                                                                                                                                                           |
| private_ipv6_google_access | core | string        | This field is for internal use. This field can be both set at resource creation time and updated usingpatch.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| project_id                 | core | string        |
| project_number             | core | string        |
| purpose                    | core | string        |
| region                     | core | string        | URL of the region where the Subnetwork resides. This field can be set only at resource creation time.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| region_id                  | core | string        |
| reserved_internal_range    | core | string        | The URL of the reserved internal range.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| resource_name              | core | string        |
| role                       | core | string        | The role of subnetwork. Currently, this field is only used when purpose is set to GLOBAL_MANAGED_PROXY orREGIONAL_MANAGED_PROXY. The value can be set toACTIVE or BACKUP. An ACTIVE subnetwork is one that is currently being used for Envoy-based load balancers in a region. A BACKUP subnetwork is one that is ready to be promoted to ACTIVE or is currently draining. This field can be updated with a patch request.                                                                                                                                                                                                   |
| secondary_ip_ranges        | core | json          | An array of configurations for secondary IP ranges for VM instances contained in this subnetwork. The primary IP of such VM must belong to the primary ipCidrRange of the subnetwork. The alias IPs may belong to either primary or secondary ranges. This field can be updated with apatch request.                                                                                                                                                                                                                                                                                                                         |
| self_link                  | core | string        | [Output Only] Server-defined URL for the resource.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| stack_type                 | core | string        | The stack type for the subnet. If set to IPV4_ONLY, new VMs in the subnet are assigned IPv4 addresses only. If set toIPV4_IPV6, new VMs in the subnet can be assigned both IPv4 and IPv6 addresses. If not specified, IPV4_ONLY is used. This field can be both set at resource creation time and updated usingpatch.                                                                                                                                                                                                                                                                                                        |
| state                      | core | string        | Output only. [Output Only] The state of the subnetwork, which can be one of the following values:READY: Subnetwork is created and ready to useDRAINING: only applicable to subnetworks that have the purpose set to INTERNAL_HTTPS_LOAD_BALANCER and indicates that connections to the load balancer are being drained. A subnetwork that is draining cannot be used or modified until it reaches a status ofREADY                                                                                                                                                                                                           |
| tags                       | core | hstore_csv    |
| zone_id                    | core | string        |