This section describes how to troubleshoot various error scenarios. Failure to Add or Delete a Transport NodeYou cannot delete or add a transport node. Transport Node Takes About 5 Minutes to Connect to Another ControllerWhen an ESXi transport node's connected controller goes down, it takes about 5 minutes for the transport node to connect to another controller. NSX Manager VM Is DegradedNSX Manager that is deployed on a KVM host returns an error when running CLI commands such as get service and get interface. NSX Agent Times Out Communicating with NSX ManagerIn a large-scale environment with many transport nodes and VMs on ESXi hosts, NSX agents, which run on ESXi hosts, might time out when communicating with NSX Manager. Failure to Add an ESXi HostYou are not able to add an ESXi host to the NSX-T Data Center fabric. Incorrect NSX Controller StatusSome controllers in an NSX Controller cluster report incorrect status for one of the controllers. Management IPs on KVM VMs Not Reachable with IPFIX EnabledWhen IPFIX is enabled on multiple VMs on a KVM host and the sampling rate is 100%, the management IPs on some of the VMs might intermittently be unreachable. Upgrade Fails Due to a TimeoutAn event during the upgrade process fails and the message from the Upgrade Coordinator indicates a timeout error. Edge Transport Node Status Degraded if Any Interface is DownAll interfaces are counted in an edge transport node status, and should be connected and Up.