my $parser = new XML::LibXML;

my $tree = $parser->parse_file('935.xml');
my $root = $tree->getDocumentElement;

my @devices = $root->findnodes('/SymCLI_ML/Symmetrix/Device/Dev_Info');

for my $device_id ( @devices ) {
    my $dev_name = $device_id->findnodes('./Dev_Name');
    my $dev_conf = $device_id->findnodes('./configuration');
    print $dev_name->to_literal, "\t", $dev_conf->to_literal, "\n";
}