I was given a perl script that will read Cisco device hostnames from a text file then snmp query different values against those devices and write the output to a .csv file. The values I want to query are ifDescr, ifOperStatus, ifAdminStatus, ifLastChange. See the “my @columns” section in the first line or two. Here's the problem I have. The script appears to walk all values but only writes the first row of output to the .csv file. Can someone help me out here? Oh yea. My programming skills are weak at best…..especially in perl! 
#!/usr/bin/perl 
my @columns = qw/interfaces.ifTable.ifEntry.ifDescr interfaces.ifTable
+.ifEntry.ifAdminStatus interfaces.ifTable.ifEntry.ifOperStatus interf
+aces.ifTable.ifEntry.ifLastChange/;
my $CSV = "/opt/home/johnsonr/scripts/output.csv";
my $NODES = "/opt/home/johnsonr/scripts/nodes";
#
use strict 'vars';
use Getopt::Std;
use vars qw/ %opt /;
my (%snmpwalk);
my ($csv, $nodes, $tmp, $i, $x, $nam, $val, $node);
my ($opt_d, $opt_c, $opt_n, $debug, $column, $node, $line);

getopts ('dc:n:',\%opt) or &usage;
$debug = $opt{d} ? 1 : 0;
$csv = $opt{c} ? $opt{c} : $CSV;
$nodes = $opt{n} ? $opt{n} : $NODES;
print "nodes=$nodes\n";
sub usage()
    {
        print STDERR << "EOF";

    This program read a nodes files and creates a csv file with snmp v
+alues for each node.
 
    usage: $0 [-d] [-c:csv_file] [-n:nodes_file]  [test-input-file-jus
+t-for-demo] 

     -d        : print debugging messages to stderr
     -c        : csv output file name. Default $CSV 
     -n        : nodes input file name. Default $NODES 

EOF
        exit;
    }

open (NODES, "<$nodes") or die "could not open nodes file $nodes";    
+                  
                        
open (CSV, ">$csv") or die "could not open scv file $csv";            
+          
$tmp = join(",",@columns);                      
print CSV "$tmp\n";                     
                        
while (<NODES>) {                       
        chop;           
        $node = $_;             
        $line = "";             
        print "- $node\n" if $debug;            
        foreach $column (@columns) {            
                $_ = `snmpwalk $node VER143r $column`;  
                if (/=\s*(.*)$/) {      
                        $val = $1;
                } else {        
                        $val = "???";
                }       
                $line .=  $val . ",";   
                print "-- $column, $val\n" if $debug;   
        }               
        chop $line;             
        print CSV $line."\n";           
}

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2005-09-23 Retitled by g0n, as per Monastery guidelines
Original title: 'Can someone help???'

In reply to Writing SNMP walk to CSV file by getwithrob

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