Intermediate · Peering · 6 of 15

Peer a spoke built from an old template

Problem

vnet-spoke2 won't peer with vnet-hub, so vm-spoke2 can't reach vm-hub on 443.

Your job
  • Clear whatever stops vnet-spoke2 peering with vnet-hub
  • Get the peering Connected on both sides
  • Get vm-spoke2 reaching vm-hub on 443
Background

vnet-spoke2 was built from an old template. Its only subnet, subnet-app, holds vm-spoke2 at 10.20.1.4. It isn't peered to anything yet. Peer it with vnet-hub so vm-spoke2 can reach the shared service on vm-hub (10.0.1.4) on port 443.

How to work it
  1. 1See it fail

    Prove the problem yourself before you change anything. Reports are often wrong.

    VM commands forVMs
    1. ssh vm-spoke2
      What's this?

      Opens a shell on vm-spoke2, so the next commands run on that VM. In this lab it's a shortcut. In real Azure you'd connect through something like Azure Bastion, or SSH to an address you can reach.

    2. nc -zv 10.0.1.4 443
      What's this?

      netcat, a standard Linux tool. Tries to open a TCP connection and reports whether it worked.

      • -z only check whether the port answers. Send no data
      • -v print the result in words
      • 10.0.1.4 where to connect
      • 443 the port to try

    Ticks off when the test runs on vm-spoke2.

  2. 2Find where it stops
  3. 3Name the cause
  4. 4Fix it and test again
  5. 5Explain it
Sources on Microsoft Learn (2)
0/3 changes
Network map
?
  • Resource group, the outer dashed frame
  • Virtual network, with its address space top right
  • Subnet, with range and usable IPs (5 reserved)
  • Network security group. A small shield on a VM's NIC means the NIC has one too
  • Route table on the subnet
  • NICVM Appliance Private endpoint
  • Peering Connected Initiated or access off
  • Goal working Goal broken, X marks where it stops
  • Private DNS zone, dotted lines go to linked VNets
  • Orange pulse: what your last command changed. Drag to pan, Ctrl and scroll to zoom.
Resource grouprg-labvnet-hub: tap to inspectVirtual networkvnet-hub10.0.0.0/16subnet-shared: tap to inspectsubnet-shared10.0.1.0/24 · 251 usablevm-hub 10.0.1.4: tap to inspectNICvm-hub10.0.1.4vnet-spoke2: tap to inspectVirtual networkvnet-spoke210.0.0.0/16, 10.20.0.0/…subnet-app: tap to inspectsubnet-app10.20.1.0/24 · 251 usablevm-spoke2 10.20.1.4: tap to inspectNICvm-spoke210.20.1.4:443 ✗
  • vm-spoke2 → vm-hub:443should work: not working
Goals 0/4
Cloud Shell · bashVMsrg-lab · eastus2
cloudshell:~$