Comments on: IOS – Passing commands with ssh

By: Josh

Josh — Wed, 13 Jan 2010 07:32:46 +0000

Everyone,

Thanks for the tips.

Josh

By: Rob Zeke

Rob Zeke — Fri, 04 Sep 2009 03:43:01 +0000

I used to work in a network operations center, and I loved scripting for config changes. I used SecureCRTs fantastic scripting support, and wrote VBScripts, mostly for password changes or config backups or applying a command across all routers. Whats great is that the newer IOS images allow you to upgrade the IOS from the command line, which could easily be worked into a script. I believe its called auto-upgrade manager.

By: kamikatze

kamikatze — Wed, 19 Aug 2009 20:37:17 +0000

Cmon’ guys don’t ignore the snake

import pexpect
import os

ssh = pexpect.spawn(“ssh user@router”)
ssh.expect(‘Password:’)
ssh.sendline(password)
ssh.expect(‘Router>’)
ssh.sendline(‘show ip bgp summary’)
ssh.expect(‘Router>’)
print ssh.before
ssh.close()

By: BungErik

BungErik — Sun, 16 Aug 2009 15:19:11 +0000

You always gave good trick !

By: Josh

Josh — Sat, 18 Jul 2009 23:43:49 +0000

Thanks Ivan! I really need to get into TCL….especially after reading your blog and all the neat things that can be done with it.

Josh

By: monaim

monaim — Wed, 15 Jul 2009 21:30:06 +0000

As Pavel showed,’Expect’ should do the trick for automatic login. By the way, there are ports to other languages specifically python and Ruby for those like me who don’t code in Perl.

By: Pavel

Pavel — Tue, 14 Jul 2009 11:44:32 +0000

#!/usr/bin/perl -w

use strict;

use Expect;

sub scp($$)
{
my ($from, $to) = @_;

my $cmd = “scp $login\@$host:/$from $path_input/$to”;
print $cmd.”\n”;

my $exp = Expect->spawn($cmd, ()) or die “Cannot spawn $cmd: $!\n”;

$exp->log_stdout($debug);

$exp->expect($timeout,
[ qr/assword:/ => sub { my $exp = shift; $exp->send("$password\n"); exp_continue; } ],
[ qr/yes\/no\)/ => sub { my $exp = shift; $exp->send("yes\n"); exp_continue; } ],
[ qr/.+/ => sub { exp_continue; } ],
[ 'eof' => sub { return; }],
);

my $retVal = $exp->exitstatus();

$exp->soft_close();

return $retVal;
}

By: Frank

Frank — Thu, 09 Jul 2009 21:29:57 +0000

Hey Josh,
Glad to see you back online and posting. I’ve been working on setting up my home lab and watching intently for the next post. I’m not sure about script based config management, but the next thing i wanted to tackle, was working with Rancid for managing cisco IOS config backups. Im nowhere there yet, but maybe this is something you are interested in…
Really Awesome New Cisco confIg Differ (RANCID)
http://homepage.mac.com/duling/halfdozen/RANCID-Howto.html

By: Ivan Pepelnjak

Ivan Pepelnjak — Wed, 08 Jul 2009 15:33:03 +0000

Configuration changes? Simple … just write a Tclsh script and execute it with SSH

Automatic login: on a million wish lists, but not implemented.