Reference documentation and code samples for the Compute Engine v1 API enum BackendServiceConnectionTrackingPolicy.Types.ConnectionPersistenceOnUnhealthyBackends.
Specifies connection persistence when backends are unhealthy. The default value is DEFAULT_FOR_PROTOCOL. If set to DEFAULT_FOR_PROTOCOL, the existing connections persist on unhealthy backends only for connection-oriented protocols (TCP and SCTP) and only if the Tracking Mode is PER_CONNECTION (default tracking mode) or the Session Affinity is configured for 5-tuple. They do not persist for UDP. If set to NEVER_PERSIST, after a backend becomes unhealthy, the existing connections on the unhealthy backend are never persisted on the unhealthy backend. They are always diverted to newly selected healthy backends (unless all backends are unhealthy). If set to ALWAYS_PERSIST, existing connections always persist on unhealthy backends regardless of protocol and session affinity. It is generally not recommended to use this mode overriding the default. For more details, see Connection Persistence for Network Load Balancing and Connection Persistence for Internal TCP/UDP Load Balancing.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-08 UTC."],[[["\u003cp\u003eThis page provides documentation for the \u003ccode\u003eConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e enum within the Google Cloud Compute Engine v1 API, specifically for .NET.\u003c/p\u003e\n"],["\u003cp\u003eThe enum \u003ccode\u003eConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e specifies how connections persist when backends become unhealthy, offering options such as \u003ccode\u003eALWAYS_PERSIST\u003c/code\u003e, \u003ccode\u003eDEFAULT_FOR_PROTOCOL\u003c/code\u003e, and \u003ccode\u003eNEVER_PERSIST\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eDEFAULT_FOR_PROTOCOL\u003c/code\u003e setting only persists existing connections on unhealthy backends for connection-oriented protocols like TCP and SCTP when in PER_CONNECTION tracking mode or when 5-tuple session affinity is configured.\u003c/p\u003e\n"],["\u003cp\u003eThe page lists available versions of the Google.Cloud.Compute.V1 package for this specific enum, ranging from version 1.0.0 to 3.6.0, with version 3.6.0 being the latest.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation includes a table outlining the fields of the enum, detailing the names (\u003ccode\u003eAlwaysPersist\u003c/code\u003e, \u003ccode\u003eDefaultForProtocol\u003c/code\u003e, \u003ccode\u003eNeverPersist\u003c/code\u003e, \u003ccode\u003eUndefinedConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e) and their descriptions.\u003c/p\u003e\n"]]],[],null,[]]
