When it comes to network troubleshooting in an ESXi host, there are various types of information that can be useful to a vSphere administrator such as basic information like a virtual machine’s IP Addresses, MAC Addresses, Uplink ports, Port ID, etc. to the network statistics view in the [r]esxtop command-line utility. However, all of this useful information today is spread across multiple tools and this can be challenging for a vSphere administrator when needing to quickly retrieve this data while troubleshooting an issue.
With the release of vSphere 5.1, the network namespace in ESXCLI has been enhanced to include a comprehensive set network statistics at various points in the virtual network. This enables a vSphere administrator to easily get an overall status of the vSphere network as well as provide the ability to drill down further for troubleshooting.