[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[],[],null,["# GARP and RA packet specifications for HA policy with fast IP move\n\nThe following sections specify the GARP and RA packet specifications required by\nGoogle Cloud when the `haPolicy.fastIPMove` backend service parameter is\nset to `GARP_RA`.\n\nGARP packet format for IPv4 traffic\n-----------------------------------\n\nThe following fields are required when you use a GARP packet to trigger a\nnew leader.\n\nRA packet format for IPv6 traffic\n---------------------------------\n\nRA supports advertising multiple IPv6 prefix ranges in a single RA packet by\nattaching multiple ICMPv6 [prefix information\noptions](https://www.rfc-editor.org/rfc/rfc4861#section-4.6.2).\n\nWhen `haPolicy.fastIPMove` is set to `GARP_RA`, every IPv6 prefix range in a\nsingle RA packet should be an exact match to a forwarding rule IP address, and\nall of those forwarding rules must point to the same regional backend service.\n\nIf the set of IPv6 prefix ranges are served by different regional backend\nservices, the RA packet is treated as invalid and doesn't trigger a fast IP\nmove.\n\nThe following fields are required when you use an RA packet to trigger a\nnew leader."]]
