具有环回地址且无连接的 Azure VM 网卡

Question

we have a vm which is in Azure but we're not able to connect to it. I checked the serial log under boot diagnostic and it has the following error:

======== Microsoft Azure VM Health Report - Start 2020-02-19T20:50:47.2786733Z ======== {"reportTime":"2020-02-19T20:47:44.9492172Z","networkAdapters":[{"name":"Loopback Pseudo-Interface 1","status":"Up","macAddress":"","ipProperties":[{"protocolVersion":4,"address":"127.0.0.1","isDhcpEnabled":false},{"protocolVersion":6,"address":"::1","isDhcpEnabled":false}]}],"remoteAccess":null,"accounts":{"windows":{"adminAccountPasswordExpired":false,"adminAccountDisabled":false}},"services":[{"errorControl":"Normal","exitCode":0,"name":"TermService","processId":2708,"serviceType":"Share Process","startMode":"Auto","startName":"NT Authority\\NetworkService","state":"Running","status":"OK"}

The key part I think is the "name":"Loopback Pseudo-Interface 1" It has no mac address as above and uses IP of 127.0.0.1, Has anyone come across this before and know how to get the NIC to be recognised. I've changed the NIC and changed IP, but cannot seem to resolve this.

Answer 1

By default, 127.0.0.1 is assigned to a loopback interface. It represents the localhost address. The captured health report is meanless and not enough to identify why you are not able to connect to that Azure VM.

First, you can verify if the VM status is running on the overview of the virtual machine portal. Then check if there is any port blocking in the NSG on the networking of VM, then try to RDP or SSH to that Azure VM. You can get more details on diagnose and solve problems under overview.

If you still could not connect to it. Try to resize or redeploy your Azure VM. If you have important data, please backup your OS and data disk before you redeploy it. You also could get more details on how to use boot diagnostics to troubleshoot virtual machines in Azure .

Hope this could help you.