PowerShell/Docs/check-mac-address.md

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## The PowerShell Script **check-mac-address.ps1**
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This PowerShell script checks the given MAC address for validity
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Supported MAC address formats are: 00:00:00:00:00:00 or 00-00-00-00-00-00 or 000000000000.
## Parameters
```powershell
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check-mac-address.ps1 [[-MAC] <String>] [<CommonParameters>]
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-MAC <String>
Specifies the MAC address to check
Required? false
Position? 1
Default value
Accept pipeline input? false
Accept wildcard characters? false
[<CommonParameters>]
This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction,
WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
```
## Example
```powershell
PS> ./check-mac-address 11:22:33:44:55:66
✔️ MAC address 11:22:33:44:55:66 is valid
```
## Notes
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Author: Markus Fleschutz | License: CC0
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## Related Links
https://github.com/fleschutz/PowerShell
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## Source Code
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```powershell
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<#
.SYNOPSIS
Checks the given MAC address for validity
.DESCRIPTION
This PowerShell script checks the given MAC address for validity
Supported MAC address formats are: 00:00:00:00:00:00 or 00-00-00-00-00-00 or 000000000000.
.PARAMETER MAC
Specifies the MAC address to check
.EXAMPLE
PS> ./check-mac-address 11:22:33:44:55:66
✔️ MAC address 11:22:33:44:55:66 is valid
.LINK
https://github.com/fleschutz/PowerShell
.NOTES
Author: Markus Fleschutz | License: CC0
#>
param([string]$MAC = "")
function IsMACAddressValid { param([string]$mac)
$RegEx = "^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})|([0-9A-Fa-f]{2}){6}$"
if ($mac -match $RegEx) {
return $true
} else {
return $false
}
}
try {
if ($MAC -eq "" ) {
$MAC = read-host "Enter MAC address to validate"
}
if (IsMACAddressValid $MAC) {
"✔️ MAC address $MAC is valid"
exit 0 # success
} else {
write-warning "Invalid MAC address: $MAC"
exit 1
}
} catch {
"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
exit 1
}
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```
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*Generated by convert-ps2md.ps1 using the comment-based help of check-mac-address.ps1*