Perlscript to connect hp switch and read the mac-address

[Christian Czech]

Hi,
I need a perlscript to connect my hp procurve switch and read the mac-address from the connected hosts.
Can someone help me with an example?
Thanks Christian

[cenk sasmaztin]

what you say ??
if I true understand you
you want look pc mac address each port on switch
is this true ?

[Igoris_1]

how do you want to connect, I believe SNMP is the easiest way to retrieve MAC addresses.

[Christian Czech]

Hi,
with snmp there is no way to find out a matching witch mac-address connect on which port on the switch. (like the command show mac-address vlan 1)

;-)) I know my english is not good.

[Matt Hobbs]

There are scripts out there.... I haven't tried it but I found this - http://linux.softpedia.com/get/Programming/Libraries/SNMP-BridgeQuery-26173.shtml

[Christian Czech]

Hi,
sorry the script do not work.


#!/usr/bin/perl

my $address = "x.x.x.x";
my $community = "public";
use SNMP::BridgeQuery;
use SNMP::BridgeQuery qw(querymacs queryports queryat);

my $fdb = queryfdb(host => $address,
comm => $community);
unless (exists $fdb->{error}) {
($fdb->{$mac} = "n/a") unless (exists $fdb->{$mac});
print "This MAC address was found on port: ".$fdb->{$mac}."\n";
}
~

Output:

/test.pl
This MAC address was found on port: n/a

But I do not why. The mac addresses are in the snmp parameter (with a snmpwalk).
It is very mysteries.

[André Beck]

Hi Christian,

given that NeDi (www.nedi.ch) can do exactly that (correlate host MAC addresses to switch ports on ProCurve boxes), the information has to be there in the SNMP MIBs. The discovery module is even a perl script, so you might have a look into it for how it's done.

HTH,
Andre.