DHCP – Just Another IT Guy

Had an influx of folks come into the office last week and one of our DHCP Scopes actually almost ran out of available addresses (which I found out after the fact by chance). This inspired me to make a quick PowerShell script deployed as a scheduled task to notify me when a scope is low on available addresses, as seen below:

#SMTP Variables
$strSMTPServer = "smtp@domain.com"
$strSMTPTo = "AnotherITGuy <email@domain.com>"
$strSMTPFrom = "DHCP Alerts <alerts@domain.com>"
$strSMTPSubject = "Available Addresses for XScope Low"
$strSMTPBody = "XScope has less that 10 available addresses left"

#Pull Scope Lease info into an array
$arrXScopeDHCPLeases = Get-DhcpServerv4Lease -ScopeId "10.0.0.0" -AllLeases

#Total assignable addresses in scope
$intXScopeTotalAddresses = 95

#Number of available addresses left
$intXScopeFreeAddresses = $intXScopeTotalAddresses - $arrXScopeDHCPLeases.Count

################
#Let's Do Stuff#
################

#Send email if less than or equal to 10 free addresses
if($intXScopeFreeAddresses -le 10)
{
    Send-MailMessage -SmtpServer $strSMTPServer -To $strSMTPTo -From $strSMTPFrom -Priority High -Subject $strSMTPSubject -Body $strSMTPBody
}

#SMTP Variables

$strSMTPServer = "smtp@domain.com"

$strSMTPTo = "AnotherITGuy <email@domain.com>"

$strSMTPFrom = "DHCP Alerts <alerts@domain.com>"

$strSMTPSubject = "Available Addresses for XScope Low"

$strSMTPBody = "XScope has less that 10 available addresses left"

#Pull Scope Lease info into an array

$arrXScopeDHCPLeases = Get-DhcpServerv4Lease -ScopeId "10.0.0.0" -AllLeases

#Total assignable addresses in scope

$intXScopeTotalAddresses = 95

#Number of available addresses left

$intXScopeFreeAddresses = $intXScopeTotalAddresses - $arrXScopeDHCPLeases.Count

################

#Let's Do Stuff#

################

#Send email if less than or equal to 10 free addresses

if($intXScopeFreeAddresses -le 10)

{

Send-MailMessage -SmtpServer $strSMTPServer -To $strSMTPTo -From $strSMTPFrom -Priority High -Subject $strSMTPSubject -Body $strSMTPBody

}

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Tag: DHCP

Monitor DHCP Scope Available Addresses with PowerShell

Error: 200010 When Configuring DHCP Failover