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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-08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 webpage details the \u003ccode\u003eConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e enum within the \u003ccode\u003eGoogle.Cloud.Compute.V1\u003c/code\u003e namespace, offering different options for managing connection persistence when backends become unhealthy.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e enum includes \u003ccode\u003eAlwaysPersist\u003c/code\u003e, \u003ccode\u003eDefaultForProtocol\u003c/code\u003e, \u003ccode\u003eNeverPersist\u003c/code\u003e, and \u003ccode\u003eUndefinedConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e as its defined fields.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version for this data is \u003ccode\u003e3.6.0\u003c/code\u003e, with older versions dating back to \u003ccode\u003e1.0.0\u003c/code\u003e, all of which address the \u003ccode\u003eConnectionPersistenceOnUnhealthyBackends\u003c/code\u003e type.\u003c/p\u003e\n"],["\u003cp\u003eThe default behavior, \u003ccode\u003eDEFAULT_FOR_PROTOCOL\u003c/code\u003e, only persists existing connections on unhealthy backends for connection-oriented protocols (TCP and SCTP) under certain tracking mode or session affinity conditions, while \u003ccode\u003eNEVER_PERSIST\u003c/code\u003e always diverts connections to healthy backends and \u003ccode\u003eALWAYS_PERSIST\u003c/code\u003e always maintains connections on unhealthy backends.\u003c/p\u003e\n"],["\u003cp\u003eThe type is contained within the \u003ccode\u003eGoogle.Cloud.Compute.V1.dll\u003c/code\u003e assembly.\u003c/p\u003e\n"]]],[],null,[]]
