## Retrieves the MAC address of an snmp-enabled device 
## Returns a hex string that is the MAC address 
##  
## usage: get-mac [-agent] <string> 
##  

param( [string] $agent = "10.0.1.11" ) 

#a function to convert an octetstring into a hex string 
function get-hex($octectstring) { 	
  $len = $octectstring.length 	
  $hex = @() 	
  for($j=0;$j -lt $len;$j++)
  {
    $b = "{0:X}" -f ([int]$octectstring[$j])
    $hex = $hex + $b
  }
  return $hex
}

#get the number of network interfaces on the agent device: 
$numifs = (get-snmp -agent $agent -oid 1.3.6.1.2.1.2.1.0).OIDValue 

#for each interface, get the mac address: 
for($i=1;$i -le $numifs; $i++)
{
  $str = (get-snmp -agent 10.0.1.11 -oid 1.3.6.1.2.1.2.2.1.6.$i).OIDValue	
  write-host "Interface $i MAC Address: " (get-hex $str)
}