Connecting to Cisco device using Ruby


#1

Hi,

I’m new to Ruby and want to use Ruby for my automation.I’m trying out a
small program now.Basically, what I’m trying to do is:

1)Connect to the cisco switch via terminal server which has a public IP
address and a port number. (I’m using a fake ip here).

2)Login to the switch giving the right username and password.

3)After login, issue a switch command and get the output back.

The below program works if I comment out the “waitfor” but not
consistent and other times it fails.Can someone please point out whats
the issue here or if possible can someone share the piece of code that
does the above task.

Thanks
s_k

require ‘net/telnet’
require ‘socket’

localhost = Net::Telnet::new(
“Host” => “10.10.10.20”,
“Port” => 2033,
“Binmode” => true,
“Output_log” => ‘c:\RubyL\output.txt’,
# “Dump_log” => “dump_log”,
“Prompt” => /[$%#>:] \z/n,
“Telnetmode” => true,
“Timeout” => 50,
“Waittime” => 30
# “Proxy” => proxy
) { |c| print c }

localhost.cmd("\r") {|c| print c }

if localhost.waitfor({“Match” => ‘vcctest-30-6k>’ , “Timeout” => 50})
localhost.cmd("\r enable \r"){|c| print c }
localhost.cmd(“cisco”){|c| print c }
else
begin

      #  Adding username and password
      localhost.waitfor({"Match" => 'Username:' , "Timeout" => 50})
      localhost.cmd("cisco"){|c| print c }
      localhost.waitfor({"Match" => 'Password:' , "Timeout" => 50})
      localhost.cmd("cisco"){|c| print c }
  rescue Exception => e
      puts e.message
  retry
    #Adding enable password
    localhost.waitfor({"Match" => 'vcctest-30-6k>' , "Timeout" =>

50})
localhost.cmd("\r enable \r"){|c| print c }
localhost.cmd(“cisco”){|c| print c }
localhost.cmd(“exit”){|c| print c }

  ensure
    localhost.close

end

end


#2

Did you see
http://groups.google.com/group/ruby-talk-google/browse_thread/thread/096cabb08c34182c
?


#3

Peter B. wrote:

Did you see
http://groups.google.com/group/ruby-talk-google/browse_thread/thread/096cabb08c34182c
?

Thanks Peter.It worked.Heres’s what I did:

t = Net::Telnet::new( “Host” => “10.10.10.20”,“Port” => 2044,“Timeout”
=> 20, “Output_log” => ‘c:\RubyL\output.txt’,
“Telnetmode”=> true,“Waittime”=>2) {|c| print c }

  log = lambda{ |c| STDERR.print c }

  #needs initial enter to bring the username promt
  t.puts("\r")

  t.waitfor(/Username:/, &log)
  t.puts("cisco")
  t.waitfor(/Password:/, &log)
  t.puts("cisco")

  t.waitfor(/vcctest-30-6k>/, &log)
  t.puts("enable")
  t.waitfor(/Password:/, &log)
  t.puts("cisco")
   t.waitfor(/vcctest-30-6k#/, &log)
  t.puts("exit")
  t.cmd(""){|c| print c}