Script: PowerCLI: Get Host Network Information

Summary: A script to collect all network information from an ESX host
Date: Around 2013
Refactor: 22 March 2025: Checked links and formatting.

powershell, vmware

This script will grab all network information from a host including:

vmnic configuration
vmkernel ports information
service console information
all virtual switches
all port groups

Script

# Basehost must be an exact match to the name in vcenter
$BASEHost = Read-Host "Enter the name of the server as found in vCenter"
 
$timestamp = Get-Date -format "yyyyMMdd-HH.mm"
$outfile = "D:\sjoerd\$timestamp-$basehost-networkinfo.txt"
 
$timestamp | Out-File $outfile
 
# Original command:
# Get-VMHostNetwork $BASEHost | Select HostName,Domain,ConsoleGateWay,DnsAddress
Add-Content $outfile "`nFinding VMkernel and Service Console information on $BASEHost" -Encoding unicode
Get-VMHostNetwork $BASEHost | Format-List | Out-File $outfile -width 500 -append
 
# Original command:
# Get-VMHostNetworkAdapter $BASEHost | select VMhost, Name, IP, SubnetMask, Mac, PortGroupName, vMotionEnabled, mtu, FullDuplex, BitRatePerSec
# Get-VMHostNetworkAdapter $BASEHost | select VMhost, Name, IP, SubnetMask, Mac, PortGroupName, vMotionEnabled, mtu, FullDuplex, BitRatePerSec | Export-Csv $csvfilenic
Add-Content $outfile "`nListing all NIC information on $BASEHost" -Encoding unicode
Get-VMHostNetworkAdapter $BASEHost | select VMhost, Name, IP, SubnetMask, Mac, PortGroupName, vMotionEnabled, mtu, FullDuplex, DHCPEnabled, BitRatePerSec | Out-File $outfile -width 500 -append
 
Get-VirtualSwitch $BASEHost |Foreach {
   $switch = $_.Name
   $numports = $_.NumPorts
   $mtu = $_.Mtu
   Add-Content $outfile "`nSwitch $switch on $BASEHost has $numports number of ports and has a configured mtu size of $mtu" -Encoding unicode
   $_ |Get-VirtualPortGroup |Foreach {
   $portgroup = $_.Name
   $vlan = $_.VlanID
   Add-Content $outfile "`nPortgroup $portgroup has vlanid $vlan" -Encoding unicode
   }
}