Reference documentation and code samples for the Google Cloud Compute V1 API module Google::Cloud::Compute::V1::BackendService::IpAddressSelectionPolicy.
Specifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).
Constants
UNDEFINED_IP_ADDRESS_SELECTION_POLICY
value: 0 A value indicating that the enum field is not set.
IPV4_ONLY
value: 22_373_798 Only send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.
IPV6_ONLY
value: 79_632_100 Only send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.
IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED
value: 36_210_144 Unspecified IP address selection policy.
PREFER_IPV6
value: 408_601_302 Prioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address).
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-29 UTC."],[],[],null,["# Google Cloud Compute V1 API - Module Google::Cloud::Compute::V1::BackendService::IpAddressSelectionPolicy (v3.0.0)\n\nVersion latestkeyboard_arrow_down\n\n- [3.0.0 (latest)](/ruby/docs/reference/google-cloud-compute-v1/latest/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.22.0](/ruby/docs/reference/google-cloud-compute-v1/2.22.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.21.1](/ruby/docs/reference/google-cloud-compute-v1/2.21.1/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.20.0](/ruby/docs/reference/google-cloud-compute-v1/2.20.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.19.1](/ruby/docs/reference/google-cloud-compute-v1/2.19.1/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.18.0](/ruby/docs/reference/google-cloud-compute-v1/2.18.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.17.0](/ruby/docs/reference/google-cloud-compute-v1/2.17.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.16.0](/ruby/docs/reference/google-cloud-compute-v1/2.16.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.15.0](/ruby/docs/reference/google-cloud-compute-v1/2.15.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.14.0](/ruby/docs/reference/google-cloud-compute-v1/2.14.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.13.0](/ruby/docs/reference/google-cloud-compute-v1/2.13.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.12.0](/ruby/docs/reference/google-cloud-compute-v1/2.12.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.11.0](/ruby/docs/reference/google-cloud-compute-v1/2.11.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.10.0](/ruby/docs/reference/google-cloud-compute-v1/2.10.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.9.0](/ruby/docs/reference/google-cloud-compute-v1/2.9.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.8.0](/ruby/docs/reference/google-cloud-compute-v1/2.8.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.7.2](/ruby/docs/reference/google-cloud-compute-v1/2.7.2/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.6.0](/ruby/docs/reference/google-cloud-compute-v1/2.6.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.5.0](/ruby/docs/reference/google-cloud-compute-v1/2.5.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.4.0](/ruby/docs/reference/google-cloud-compute-v1/2.4.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.3.0](/ruby/docs/reference/google-cloud-compute-v1/2.3.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.2.0](/ruby/docs/reference/google-cloud-compute-v1/2.2.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.1.0](/ruby/docs/reference/google-cloud-compute-v1/2.1.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [2.0.0](/ruby/docs/reference/google-cloud-compute-v1/2.0.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.10.0](/ruby/docs/reference/google-cloud-compute-v1/1.10.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.9.0](/ruby/docs/reference/google-cloud-compute-v1/1.9.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.8.0](/ruby/docs/reference/google-cloud-compute-v1/1.8.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.7.1](/ruby/docs/reference/google-cloud-compute-v1/1.7.1/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.6.0](/ruby/docs/reference/google-cloud-compute-v1/1.6.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.5.0](/ruby/docs/reference/google-cloud-compute-v1/1.5.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.4.0](/ruby/docs/reference/google-cloud-compute-v1/1.4.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.3.0](/ruby/docs/reference/google-cloud-compute-v1/1.3.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.2.0](/ruby/docs/reference/google-cloud-compute-v1/1.2.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.1.0](/ruby/docs/reference/google-cloud-compute-v1/1.1.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [1.0.0](/ruby/docs/reference/google-cloud-compute-v1/1.0.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy)\n- [0.5.0](/ruby/docs/reference/google-cloud-compute-v1/0.5.0/Google-Cloud-Compute-V1-BackendService-IpAddressSelectionPolicy) \nReference documentation and code samples for the Google Cloud Compute V1 API module Google::Cloud::Compute::V1::BackendService::IpAddressSelectionPolicy.\n\nSpecifies a preference for traffic sent from the proxy to the backend (or from the client to the backend for proxyless gRPC). The possible values are: - IPV4_ONLY: Only send IPv4 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv4 health checks are used to check the health of the backends. This is the default setting. - PREFER_IPV6: Prioritize the connection to the endpoint's IPv6 address over its IPv4 address (provided there is a healthy IPv6 address). - IPV6_ONLY: Only send IPv6 traffic to the backends of the backend service (Instance Group, Managed Instance Group, Network Endpoint Group), regardless of traffic from the client to the proxy. Only IPv6 health checks are used to check the health of the backends. This field is applicable to either: - Advanced global external Application Load Balancer (load balancing scheme EXTERNAL_MANAGED), - Regional external Application Load Balancer, - Internal proxy Network Load Balancer (load balancing scheme INTERNAL_MANAGED), - Regional internal Application Load Balancer (load balancing scheme INTERNAL_MANAGED), - Traffic Director with Envoy proxies and proxyless gRPC (load balancing scheme INTERNAL_SELF_MANAGED).\n\nConstants\n---------\n\n### UNDEFINED_IP_ADDRESS_SELECTION_POLICY\n\n**value:** 0 \nA value indicating that the enum field is not set.\n\n### IPV4_ONLY\n\n**value:** 22_373_798 \nOnly send IPv4 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv4 health-checks are used to check the health of the backends. This is the default setting.\n\n### IPV6_ONLY\n\n**value:** 79_632_100 \nOnly send IPv6 traffic to the backends of the Backend Service (Instance Group, Managed Instance Group, Network Endpoint Group) regardless of traffic from the client to the proxy. Only IPv6 health-checks are used to check the health of the backends.\n\n### IP_ADDRESS_SELECTION_POLICY_UNSPECIFIED\n\n**value:** 36_210_144 \nUnspecified IP address selection policy.\n\n### PREFER_IPV6\n\n**value:** 408_601_302 \nPrioritize the connection to the endpoints IPv6 address over its IPv4 address (provided there is a healthy IPv6 address)."]]