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Full Discussion: Perl telnet to router run commands from file
Top Forums Shell Programming and Scripting Perl telnet to router run commands from file Post 302873529 by numele on Tuesday 12th of November 2013 10:04:03 AM
Old 11-12-2013
Perl telnet to router run commands from file
I have a perl script that is called with a router name command list file and output file. The command file can be very large, up to 3k of commands. At first I dumped the command list file to an array and ran the entire file on the router and captured the output. It worked ok for a command list in the hundreds but not thousands. So I changed it to the below to read each line of the command list and wait for a prompt.

It works well but since I am a perl beginner I was hoping some experienced perl people can have a look and see if this can be done any better.

Code:
called like this: perl myscript.pl -r <router_name> -f <command_file> -o <output_file>
 
#!/usr/local/bin/perl
use Net::Telnet;
use diagnostics;
use strict;
use Getopt::Std;
my %opts = ();
getopts('f:o:r:', \%opts);
my $file = $opts{'f'};
my $router = $opts{'r'};
my $output = $opts{'o'};
open PASSFILE, "</home/bin/secure/pass" or die $!;
my $password = <PASSFILE>;
chomp $password;
close PASSFILE;
$password =~ /^\s*([^:]+)\:([^:]+)\s*$/;
my $USERNAME = $1;
my $PASSWORD = $2;
my $t = new Net::Telnet (Timeout=>600,Errmode=>'return');
   $t->max_buffer_length(100000000);
   $t->open($router);
   $t->waitfor('/Telnet password[: ]*/i');
   $t->print("$PASSWORD\n");
   $t->waitfor('/.*\>*/');
   $t->print("enable\n");
   $t->waitfor('/password[: ]*$/i');
   $t->print("$PASSWORD\n");
   $t->waitfor('/.*\#$/');
   $t->print("term length 0\n");
   $t->waitfor('/.*\#$/');
  open CMDS,"<$file" or die $!;
    foreach my $line (<CMDS>) {
     chomp($line);
         $t->print("$line\n");
           my @config = $t->waitfor('/.*\#$/');
           open OUT,">>$output" or die $!;
           foreach my $config (@config) {
           print OUT "$config";
           }
           close OUT;
   }
   close CMDS;
   $t->close;

 

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LEARN ABOUT DEBIAN

snmp::info::layer3::microsoft

Info::Layer3::Microsoft(3pm)				User Contributed Perl Documentation			      Info::Layer3::Microsoft(3pm)

NAME

       SNMP::Info::Layer3::Microsoft - SNMP Interface to L3 Microsoft Windows router

AUTHOR

       begemot

SYNOPSIS

	# Let SNMP::Info determine the correct subclass for you.
	my $router = new SNMP::Info(
				 AutoSpecify => 1,
				 Debug	     => 1,
				 DestHost    => 'myrouter',
				 Community   => 'public',
				 Version     => 1
			       )
	   or die "Can't connect to DestHost.
";

	my $class      = $router->class();
	print "SNMP::Info determined this device to fall under subclass : $class
";

DESCRIPTION

       Subclass for Generic Microsoft Routers running Microsoft Windows OS

   Inherited Classes
       SNMP::Info::Layer3

   Required MIBs
       Inherited Classes' MIBs
	   See "Required MIBs" in SNMP::Info::Layer3 for its own MIB requirements.

GLOBALS

       These are methods that return scalar value from SNMP

   Overrides
       $router->vendor()
	   Returns 'microsoft'

       $router->os()
	   Returns 'windows'

       $router->os_ver()
	   Returns ''

       $router->model()
	   Returns 'Windows Router'

       $router->serial()
	   Returns ''

   Globals imported from SNMP::Info::Layer3
       See documentation in "GLOBALS" in SNMP::Info::Layer3 for details.

TABLE METHODS

       These are methods that return tables of information in the form of a reference to a hash.

   Overrides
       $router->interfaces()
	   Map the Interfaces to their physical names.	Adds interface number to interface name because identical interface cards return identical
	   "ifDescr".

   Table Methods imported from SNMP::Info::Layer3
       See documentation in "TABLE METHODS" in SNMP::Info::Layer3 for details.

perl v5.12.4							    2011-09-28					      Info::Layer3::Microsoft(3pm)
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