The diagnostic code specifies the local system's reason for the last change in session state. This allows remote systems to determine the reason that the previous session failed, for example. These diagnostic codes are specified in section 4.1 of RFC5880
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-08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 provides documentation for the \u003ccode\u003eDiagnostic\u003c/code\u003e enum within the \u003ccode\u003eGoogle.Cloud.Compute.V1\u003c/code\u003e namespace, specifically for the BfdPacket type, across multiple versions.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version documented is 3.6.0, with a range of versions available, spanning from 1.0.0 up to 3.6.0, each linked to their respective pages.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eDiagnostic\u003c/code\u003e enum includes fields like \u003ccode\u003eAdministrativelyDown\u003c/code\u003e, \u003ccode\u003eConcatenatedPathDown\u003c/code\u003e, \u003ccode\u003eControlDetectionTimeExpired\u003c/code\u003e, and others, detailing the reasons for changes in session state.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation specifies that the diagnostic codes follow section 4.1 of RFC5880, and it is housed in the \u003ccode\u003eGoogle.Cloud.Compute.V1.dll\u003c/code\u003e assembly.\u003c/p\u003e\n"],["\u003cp\u003eThere is a field called \u003ccode\u003eUndefinedDiagnostic\u003c/code\u003e, to indicate when the enum is not set.\u003c/p\u003e\n"]]],[],null,[]]