Azure Network Watcher exercise fails

Question

I am running the Exercise - Troubleshoot a network by using Network Watcher monitoring and diagnostic tools in the Monitor and troubleshoot your end-to-end Azure network infrastructure by using network monitoring tools tutorial:

• https://learn.microsoft.com/en-us/learn/modules/troubleshoot-azure-network-infrastructure/3-exercise-troubleshoot-networking-with-network-watcher

I can create the network, the VMs, the (false) NSG rule, I can enable the Network Watcher and view the topology in the Azure Portal. It looks exactly like in the exercise guide.

But when I try to create the Connection Monitor following exactly the description in the exercise guide, I am always getting the following error message (after clicking create):

Connection Monitor Back-to-front-HTTP-test creation failed

What went wrong? How can I get more information on the failure?

Thanks a lot!

Best regards,
Thomas

Answer 1

Dear @SaiKishor-MSFT ,

Thanks for picking this up so quickly. I could indeed solve the immediate issue myself: When I tried to create the connection monitor in Azure CLI, it responded with a meaningful error message telling me that the subscription was not registered for Microsoft.OperationalInsights. It was working fine (both in the UI and through CLI) when I added the registration.

Which leaves me with the following question: Why does the UI not give any meaningful error message? “Connection Monitor Back-to-front-HTTP-test creation failed” was the only error message I could see in the UI.

I also noticed that the failed transaction did create a Back-to-front-HTTP-test connection monitor. I could see that through the CLI, but not in the UI. So it seems the failed transaction was not cleanly rolled back.

And one more suggestion: You should add a hint in the exercise that the subscription must be registered for Microsoft.OperationalInsights. In a later exercise, "Troubleshoot a network by using Network Watcher metrics and logs", it is noticed that the subscription must be registered to microsoft.insights.

Thanks and best regards,
Thomas