Add-PSSnapin vmware.VimAutomation.core -ErrorAction SilentlyContinue

Connect-VIserver -Server your.vcenter.server

$VMHosts = @(Import-Csv "C:\scripts\host-info.csv")

$IPMIUser = "dpmuser"
$IPMIPass = "dpmpass"

foreach ($VMhost in $VMHosts) {

$esxMoRef = get-vmhost $VMHost.Hostname | % {Get-View $_.Id}
$IpmiInfo = New-Object Vmware.Vim.HostIpmiInfo
$IpmiInfo.BmcIpAddress = $VMHost.iLOIP
$IpmiInfo.BmcMacAddress = $VMHost.iLOMAC
$IpmiInfo.Login = $IPMIUser
$IpmiInfo.Password = $IPMIPass
$esxMoRef.UpdateIpmi($IpmiInfo)

}