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This section applies to router nodes on all hypervisors, and to compute nodes on KVM and Xen4 only. It does not apply to Virtuozzo (formerly PCS), VMware, or Hyper-V compute nodes.

The node monitor provides an easy mechanism to determine the status of a node without logging into it. It is useful for diagnosing problems such as ethernet cables not being connected without resorting to the command line interface. To gain access to the node monitor, ensure you have a keyboard and monitor plugged into the node, and press CTRL-ALT-F8.

If the node had successfully booted, you should be presented with the node monitor display, a constantly updating display of the node status.

If the node configuration has not been completed, you will see a message in red stating this fact and where the configuration has got to. You will also see the current status of every ethernet interface and the boot parameters for the system.

If the node configuration has been completed, you will see a message in green stating this. You will also see:

  • the number of node processes of each type that are running (at least one of each should be running);
  • the current status of every ethernet interface (the relevant interfaces should be marked as 'UP', though unused interfaces will show as 'DOWN'); and
  • the status of the evr status file, which will demonstrate whether connectivity to the virtual router is working; all the lines should start "OK".
A typical display is shown below:

If you do not see this screen after a few minutes, read Troubleshooting node networking problems.

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