[[["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：2025-09-05 (世界標準時間)。"],[],[],null,["# Troubleshoot Cloud Router log messages\n======================================\n\nThis guide is for troubleshooting log messages that appear in\nCloud Router logs.\n\nFor additional troubleshooting information, see the following:\n\n- [Troubleshoot BGP sessions](/network-connectivity/docs/router/support/troubleshoot-bgp-sessions)\n- [Troubleshoot BGP peering](/network-connectivity/docs/router/support/troubleshoot-bgp-peering)\n- [Troubleshoot BGP routes and route\n selection](/network-connectivity/docs/router/support/troubleshoot-bgp-routes)\n\n`NOTIFICATION_RECEIVED` message appears in Cloud Router logs\n------------------------------------------------------------\n\nA `NOTIFICATION_RECEIVED` message appears in the Cloud Router logs when\nthe Cloud Router has received a `NOTIFICATION` message from the BGP\npeer. The `NOTIFICATION` message is a signal to Cloud Router that it\nshould stop the BGP session.\n\nWhen the Cloud Router receives a `NOTIFICATION` message from its BGP\npeer, Cloud Router closes the BGP connection with that peer and removes\nall its learned routes.\n\nThe BGP peer can send `NOTIFICATION` messages for a variety of reasons. For\nexample, the peer might send a \"Hold Timer Expired\" message.\n\n`CONFIG_DISABLED` message appears in Cloud Router logs\n------------------------------------------------------\n\nA `CONFIG_DISABLED` message indicates that Cloud Router has\nintentionally stopped the BGP session. By stopping the BGP session,\nCloud Router is attempting to immediately communicate an error state to\nits peer.\n\nThis message can appear due to any of the following reasons:\n\n- A user has disabled the BGP session by using the Cloud Router API,\n Google Cloud console, or the Google Cloud CLI. See [Disabling or removing BGP\n sessions](/network-connectivity/docs/router/how-to/disabling-removing-bgp).\n\n- For a BGP session set up for Cloud VPN, the VPN tunnel associated\n with the BGP session has not established an IKE and child security\n association (SA). To troubleshoot VPN connectivity, see [Cloud VPN\n troubleshooting](/network-connectivity/docs/vpn/support/troubleshooting).\n\n- For a BGP session set up for Cloud Interconnect, the VLAN\n attachment is not configured or is in an admin-down state. To troubleshoot\n the issue further, see\n [Troubleshooting](/network-connectivity/docs/interconnect/support/troubleshooting)\n in the Cloud Interconnect documentation.\n\n- For a BFD-enabled BGP session, the BFD control detection timer on the\n Cloud Router has expired. When this occurs, the BGP session is\n stopped. For more information on BFD session states, see [BFD diagnostic\n messages and session states](/network-connectivity/docs/router/concepts/bfd-states).\n\n`LINK_DOWN` message appears in Cloud Router logs\n------------------------------------------------\n\nA `LINK_DOWN` message appears in the Cloud Router logs when the link\nbetween the Google peering edge router and your VLAN attachment for\nCloud Interconnect is down. The peering edge router is networking\nequipment that is managed by Google inside the colocation facility where you\nhave provisioned your Cloud Interconnect connection.\n\nThe `LINK_DOWN` message is a signal that the corresponding BGP peer status is\ndown. This message applies only to Cloud Interconnect-based BGP\nsessions.\n\nWhat's next\n-----------\n\n- For more information about how to use Cloud Logging to monitor\n Cloud Router, see\n [View logs and metrics](/network-connectivity/docs/router/how-to/viewing-logs-metrics).\n\n- For additional support, see\n [Getting support](/network-connectivity/docs/router/support/getting-support).\n\n- For information about BGP session states, see\n [BGP session states](/network-connectivity/docs/router/concepts/bgp-states).\n\n- For information about diagnostic messages and session states related to\n Bidirectional Forwarding Detection (BFD), see\n [BFD diagnostic messages and session states](/network-connectivity/docs/router/concepts/bfd-states).\n\n- For issues related to using Cloud Router with Router appliance,\n see\n [Troubleshooting Router appliance](/network-connectivity/docs/network-connectivity-center/support/troubleshooting#troubleshooting-ra)\n in the Network Connectivity Center documentation."]]
