Synopsis:
The goal of this workflow is to walk-through troubleshooting VM to VM communication issues in a Nutanix Cluster. Most customers are very vague when they state they have a networking issue. We will go through painting a complete picture of the network topology by asking the right questions and running commands on the Hypervisors.
Initial Triage:
Questions to Ask:
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What hypervisor is running on the cluster?
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What guestOS is running on the VMs?
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Are the VMs on the same node or different nodes?
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Are the VMs configured to use the same VLAN?
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What method is the customer using to test connectivity?
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Is there any Firewalls or ACLs that would stop this VM traffic?
Information to gather:
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NIC teaming/bond configuration on node.
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Switch vendor and model from upstream switch.
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Interface configurations for the interfaces connecting to the nodes.
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If ESXi is the customer running on a Standard vSwitch or Distributed vSwitch?
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VLAN information for each VM.
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IP and Subnet Mask configuration for each VM.
Hypervisor Networking Commands:
AHV
| Information To Gather: | Where to get this information: |
| Information To Gather: | Where to get this information: |
| Uplinks used on host | From CVM: manage_ovs show_interfaces |
| Bond configuration | From CVM: manage_ovs show_uplinks |
| VLANs used by VMs | Prism VM tab |
| IP Configuration for the VMs | GuestOS |
For more info on AHV networking and VM networking: