GNS3 Talks: Python for Network Engineers with GNS3 (Part 1). Network programmability made easy.

[@alreid12345]

Lovin this Python content and look forward to more. When will the Python specific course be available?. Hopefully not too expensive but whatever it is "shut up and take my money!!!" Thank you once again.

[@davidbombal]

Al, thank you for the comments! Great to get feedback like this :) I hope to get initial versions of the Linux and Python courses out in the next few weeks. I' ll probably release a starter versions so people can access content quicker and then continue to add content to them like I do with the KZbin videos. Thoughts?

[@alreid12345]

David Bombal sure sounds like a solid plan. please let the channel know where this can be purchased and hopefully it will be on Udemy and GNS3 Academy. Are you going to cover things like Netmiko and NAPLAM?. I would also love to see an Ansible series and would also pay for good useful practical training on Ansible. Thank you and I'm also running through your CCNA Voice series at the moment and really enjoying that content but for very different reasons. Thanks again.

[@abdulravoofka363]

Looking forward in youtube as well as GNS3 academy...more and more. Very soon , i would like to start network programming using python scripts configuring different types network topologies...

[@davidbombal]

I will cover both Netmiko and NAPLAM and more. Initially I'll cover the basics and then get deeper and deeper. Ansible will be a separate course, but that is also on my list to create asap.

[@davidbombal]

Thank you! Lots of videos coming ...

[@James67851]

It took me about a week to Learn GNS3 and get all of this to work through trial and error. I learned so much along the way about dockers, dynamits, virl, getting DHCP to work in for ubuntu, linux commands, Nano and alot more. I didn't know what any of the was when I started and today I was able to get this python script to work in my GNS3 environment. Thanks a lot this has shown me that I do have what it takes to further my IT career. Just start is a great motto. Thanks

[@mohammedelharfaoui]

Simply the best introduction to Network programming with Python. Thanks a lot.

[@FaeizMohammed]

Thank you so much sir, the mistake I made was using Eve-ng community edition. Switched back to GNS3 and I am using your videos. Now I have a lot of catching up too do. I really appreciate your efforts. A big thank you

[@abdimohamed1554]

Faeiz Mohammed I am curios. What was the issue with Eve-Ng community version?

[@FaeizMohammed]

Abdi Mohamed EvE Ng community has limitations unlike GNS3, also I switched to Ubuntu Linux to run GNS3 and I don’t run it on windows

[@dattarayahonrao6928]

The best video tutorial for network engineer to start learning python.

[@davidbombal]

Thank you. I appreciate it!

[@danielshin3559]

here agreed Absolutely!

[@xtensionxward3659]

i got recently CCNA certified and this is the first time i see programming and networking work together , this is so freakin magical ! i can only imagine the fun and euphoria i will feel having my router on GNS3 configured with loopback using a simple python script :D thanks for the motivation to move forward in network automation however i would love to see things that python can do that are not similar to just telneting and directly configuring the routers

[@davidbombal]

Really happy to hear that the video inspired you!

[@hainguyen-it8598]

Tks you, after I bought your course on udemy (python for networking), I combined automation skill with 5 years of network exp, then nearly x2 my income with new position of network admin for a securities company. Really helpful

[@bensake7921]

This was fantastic. I've been trying to pickup programming for a while (as a network engineer), but just couldn't see "WHY" I should be doing it. After seeing this, seeing the "why", it's now motivating to learn Python, and furthermore know where to start! Thanks for the great vid.

[@davidbombal]

Thanks Ben! All the best with your network automation journey.

[@Tcpipx]

Simply WOW! I recently discovered David's courses. I have to say, I finally see the light! This video was EXCELLENT! Is the first time I see Python applied to networking hands on! Thank you for that David!!!

[@davidbombal]

Thanks Robert! Glad to hear you are enjoying the videos :)

[@kebeeyong9360]

Finally i'm up and running with GNS 3 on ubuntu 16.04, thanks for this great tutorials

[@rougearlequin]

Best intro to Python for Network so far. Keep up the good work!

[@davidbombal]

Thank you. Stay tuned!

[@jeffsicuranza1168]

I went through the video, excellent introduction as well as re-enforcing the just do it approach. As many of us experienced network engineers recall this particular example is similar to using inspect or a ZOC like terminal emulator with a macro recorder that utilizes a script language. In ZOC for example you record your steps first on the device, then you just edit the macro recording for changes/variables(username, interface numbers, IP addresses etc.), resulting in REXX macro that I just run from ZOC to the router or switch. Very easy and powerful and I had to do this to deploy QoS commands to over 10,000 ports on a global network 6 years ago. The Python approach is especially flexible when you leverage the python interpreter on the actual network device’s OS. Since most network OS will be Linux based in one form or another will mostly likely now have a python 2.x or 3.x interpreter built in, just as Davide showed on the UBUNTU container. So, for some of the more OS specific commands you can just add something to the effect of “import cisco” and use the same concepts David outlined but on the device directly with script objects such as cisco.cli('show hostname') or cisco.cli("config t") or cisco.cli("interface vlan2") for example. You can save and run the script directly on the Cisco device for operators to run to make changes locally(a menu too), or run it from other network devices or centrally as David showed. I did this on a Nexus NXOS on 7k and 5k a few years back. Other venders will have their libraries as David mentioned that can be imported and run on the device directly or you access them remotely. Very powerful indeed. Great video and I look forward to the others. I always learn something from David.

[@davidbombal]

Great comments Jeff! Thank you for the input :)

[@bernardbain5302]

Love theses videos very clear and easy to understand unlike the constant issues you get with GNS3, I am constantly being bogged down with new issues which take days sometimes weeks to resolve totally hindering and slowing down the studying and learning process for me

[@Danth01gt]

This is awesome!!! I managed to create my first ever script (I have zero programming experience). Had a few hiccups with getting it to work with windows and understanding the logic but once I got it working I was able to perform a test script to log into a device at work and do a show command then exit. Thank you so much for the awesome tutorial!

[@davidbombal]

Congratulations! Thank you for watching.

[@PROUDVETERAN1]

I'm a voice engineer always looking for better ways of doing what I do for many years. It's was inevitable that I needed to learn a new skill set. I was specifically looking for content your are providing. Thank You!!

[@davidbombal]

Thank you for watching Joon!

[@nadirslh60]

Outstanding training methods David , it does not get any easier and any better than this. Gratitude Sir !

[@davidbombal]

Thanks for the comment!

[@LesterCarrejo]

David, I finally got around to trying this on a actual Cisco 3560 switch and IT WORKED Flawlessly!! Thank You for all of your informational video and especially the blogs with the DEV NET OPS, I hope it doesn't take me as long to try those out. Thanks again. You Rock!!

[@davidbombal]

Thank you! And well done!

[@ipserv9539]

I really liked the way you are explaining things for the people who don't have any coding experience. Thanks for sharing videos about python.

[@davidbombal]

Glad it was helpful!

[@MrDropvis]

Thank you for sharing this knowledge, been a fan of your video's for a while and wanted to thank you as your video's are awsome !! keep the good work

[@zosmanovic9763]

I think you will change my life...as a netops guy this is Gold

[@spidygamingb9120]

""the best way to do it ....is to do it""....excellent encouragement..

[@g-man21]

You should have been in the Queen's Birthday honours list. David Bombal MBE ;). Thanks for the superb videos you put out on various Network tech, but this has taken me to the next stage and opens the door to so much more.

[@albertlee8537]

Thanks David for sharing your knowledge! I also love “practical learning” especially via KZbin. This series that you have posted is an excellent way to have a feel of “networking programming”. Keep up the good work!

[@davidbombal]

Thank you Albert! I'm glad to hear you are enjoying the videos :)

[@dattarayahonrao6928]

Thanks a lot!!! These is like teaching a Network Engineer how take baby steps towards python. Best help one can use to get started.

[@davidbombal]

Thank you! Each journey starts with one step :)

[@gladegel123]

I like the way you are teaching for network engineer who are Python beginners.

[@davidbombal]

Glad to hear that and thank you :)

[@muhammadusmanali9779]

Sir, Your Videos are very good that motivate me to learn the python. Because I am Network Administrator and I love to learn the New Technologies specially Cisco, Linux, GNS3, Python. Keep motivate us. Thanks

[@davidbombal]

Thank you! I am glad you are enjoying my videos Muhammad!

[@victormelothemaster]

you will need to learn Cisco, Linux ,Gns3 and Python to have a better idea of what David is doing because he is using all those tools and command here! Go easy on yourself and try to learn one by one

[@TravelisToLive]

Hey David! you are doing a good job man, keep up the spirit. This is going to help a lot of network engineers across the globe. Love from INDIA

[@kenmurphy4259]

Ok, I'm hooked now! Thanks David, great tutorials. I want to start using python!

[@davidbombal]

That's great news Ken! Lots more programming coming in the next few days :)

[@NewtonMbazima]

Hi David, Thank you very much for all your hard work and this valuable set of learning material. i am enjoying the course on GNS3

[@davidbombal]

You're very welcome, thanks for the feedback Newton!

[@ujjalsamanta5841]

now I am very interest to learn python after see your lecture. ..thank you. .

[@abhishekshah11]

This is so beautiful. Thanks David!

[@kritikapathak2728]

Hello Mr. David, thank you so much for this tutorial! And the Amazing part of all your videos are that on every step, you always motivates the learner. Thanks again!

[@славаегоров-р2ф]

Mr.Bombal biggest thanks (sorry for my bad english), good words about just do it... wery good practical learning...

[@davidbombal]

Thank you! You English is great... no need to apologise :)

[@alreid12345]

Quick word of warning just in case people are trying the copy and paste the script the formatting in the description does not work exactly. Remember to check it's exactly same as the video. The if password loop is where you need to be careful!. Thanks again David.

[@davidbombal]

Thanks for the feedback Al. I have now moved all code examples to GitHub, so hopefully things have now improved.

[@RezwanRahman]

your all video is very very very help full ..thanks a Ton "David Bombal"

[@davidbombal]

Thank you for watching Rezwan!

[@gabimassi8265]

great, everything works fine so far... thank you so much... salute from Zurich

[@davidbombal]

You're welcome Gabi!

[@HugoArmando35]

Wow beautiful! I had not seen this video!!!!

[@antikoerper256]

10:44 - very neat, thanks for this tutorial

[@carlosmunozii9318]

Excellent video! You just earned a new subscriber, cheers!

[@cresrey5961]

Damn! David why you are so great! Your a rockstar!

[@abdulravoofka363]

Simply great video..Many thanks David. Loved it...looking forward for more network programmability using python scripts

[@davidbombal]

Thank you! Lots of Python and network programmability videos in the queue :)

[@abdulravoofka363]

Many thanks...Looking forward on this. And trying to best to follow with you...

[@rajivnarayan5214]

Extremely useful introduction, that you very much.

[@bikramjeetsandhu2382]

Thanks David - You are awesome 👏🏻

[@cil3150]

amazing David! straight forward!

[@klittlet005]

Thank you! I have GNS3 running on Ubuntu. If my thinking is correct, I should be able to run the python scripts without adding a Linux box into the GNS3 environment. Years ago I have used bash scripting to send IP, username, password and commands using Expect . And often gathering the show output for analysis. I'll look for your training material after I finish my intro python class.

[@MatheusHenrique-jz1dc]

Excellent David thank you!!

[@haxid.]

Thanks you a lot!! im a really beegginer to code. your video really empower me to do more !!

[@davidbombal]

Thanks Christian, I'm glad that helped.

[@moussainfotech8683]

Thanks a lot for this cours is very important content

[@PrabhatKumar-pc4ec]

Thanks David ...:) i was searching for this kind of tutorial....

[@davidbombal]

Thank you Prabhat! Glad to hear the tutorial was helpful :)

[@ER_aka_RAM]

Cheers for the attention to detail 🍻

[@jonathandominguezrebollo6564]

Great Content David... Congrats

[@ErnieJunValledorbunny]

Very detailed explanation.

[@didyouknow1844-w3r]

Thanks David this is the beginning of my carrier in network automation ;)

[@RishiKumar-uo9fp]

awesome stuff to learn David.....thanks a ton for this....

[@voipgenius5765]

i love the way you teach us .... great

[@davidbombal]

Thank you. I appreciate it!

[@karubees]

Great video brother David!

[@davidbombal]

Thank you!

[@dhilipkumar2567]

Good explanation David😊 Thanks much!

[@davidbombal]

Thank you!

[@juanlyon3368]

David Bombal!!! a big thank you

[@davidbombal]

Thanks, Juan!

[@CarlosLopez-vx5wb]

Great video David and thanks for share your acknowledge!

[@davidbombal]

Thank you for watching Carlos!

[@MuhammadKhan-yl7mt]

Very nicely walked through, thanks.

[@davidbombal]

Thank you

[@julaoscisar]

David, What about to use python3.X, pyhton 2.X is will has not anymore support since Jan/2020? The scripts you sre using will not work with python 3.X anymore, right??

[@farajibader1913]

You are the best .. Very simple explination to a hard subject .. Can yiu please recommand books that are related to this ?

[@anthonysbarat]

Wow, really cool! Thank you for sharing this knowledge!

[@davidbombal]

Thanks Anthony, I'm glad that helped.

[@AnonymousC]

YOU ARE THE MAN DAVID

[@davidbombal]

Thanks!

[@AnonymousC]

Honestly i am still a beginner ( in python , makes me struggle in some parts ) , but this course made me transition into someone else with practical skills , Sir if you ever release a new cisco + python programmability course ( Paid or free ) , immediately i will be the first customer to sign in ..looking forward to it Regards

[@davidbombal]

I am working on a course. Thank you for the feedback :)

[@Danth01gt]

Good stuff!!! This could have been a great thing to use to make QoS changes to 260ish routers I had to do a while back.

[@davidbombal]

Thank you for watching. Network automation can really save time :)

[@ngstylenew-grow9779]

Great video David!

[@davidbombal]

Thank you for watching :)

[@joseluisquintero4076]

Excelente! Gracias por el contenido. Saludos desde Venezuela

[@davidbombal]

De nada Jose! Enjoy the videos :)

[@datsun7777]

Great video. Thanks David.

[@davidbombal]

Thanks. Stay tuned.

[@beatzbyDAVE]

I can only thank you. thank you, sir

[@davidbombal]

You're very welcome :)

[@123456789lkjkm]

Thanks David, that is great videos.

[@davidbombal]

Thanks :)

[@123456789lkjkm]

Dear David, What's " if password: " mean?

[@jorgegill1225]

It'd be cool if you had explained your GNS3 configuration

[@SaveraVikasBarjo]

great intro of python for Network folks. Thanks David :) most of the #PythonForNetworkEngineers video are just the python videos. but this really helped me to understand the basic application of python in networks devices.

[@davidbombal]

Thank you! I'm glad you are enjoying the videos :)

[@Mohammad_1234uk]

Thank you so much David

[@steveperson1553]

Thanks david for showing us the "Python way" but i don't get the point in it, when you can run these commands in cisco IOS in half the time

[@jasonme3557]

Very nice. TY David.

[@davidbombal]

Thank you Jason

[@عليكاظممزهرشكارةالعبودي]

That's incredible. Thank you

[@davidbombal]

Thanks for the comment, you're welcome!

[@ldbisono]

Thanks very much David for sharing your knowledge! from RD

[@davidbombal]

Thank you Luis!

[@kevindoom]

you are the best!!!

[@patrickslomian7423]

What are the alternative for CISCO templates ?

[@johntaylor9861]

Dave, good job on the video, but I have 3 basic questions. 1. How did you create Ubuntu inside a docker container? 2. How exactly did you configure the NAT cloud, I assume that Ubuntu was using one interface to communicate with the GNS3 switches and another to be able to get to the Internet for the apt-get repos. 3. What served as the DNS server for the router? Regards, John.

[@davidbombal]

Thank you John. Please search the videos on my channel that show options like these and much more: Ubuntu: kzbin.info/www/bejne/n5qUqqGDrL2ce5o and NAT: kzbin.info/www/bejne/aKvIoHZohpmgjZI The router was not using DNS in this topology.

[@johntaylor9861]

I'm sorry, I meant DHCP. Thank you, I will look into the links that you have provided.

[@davidbombal]

The NAT device is acting as a DHCP server.

[@DanBarbatti]

Nice intro David !

[@davidbombal]

Thanks Dan! Great to see you here :)

[@mohammadrahman9062]

Hi David, Please see my script below import getpass import sys import telnetlib HOST = "192.168.131.130" user = raw_input("Enter your telnet username: ") password = getpass.getpass() tn = telnetlib.Telnet(HOST) tn.read_until("Username: ") tn.write(user + " ") if password: tn.read_until("Password: ") tn.write(password + " ") tn.write("enable ") tn.write("cisco123 ") tn.write("conf t ") tn.write("int loopback0 ") tn.write("ip add 1.1.1.0 255.255.255.0 ") tn.write("end ") tn.write("exit ") print tn.read_all() It asks me password and when I enter password it gets stuck and get the below error. Please help me otherwise I can't proceed. Traceback (most recent call last): File "pythonR1script1", line 14, in tn.read_until("Password: ") File "/usr/lib/python2.7/telnetlib.py", line 293, in read_until return self._read_until_with_poll(match, timeout) File "/usr/lib/python2.7/telnetlib.py", line 342, in _read_until_with_poll return self.read_very_lazy() File "/usr/lib/python2.7/telnetlib.py", line 454, in read_very_lazy raise EOFError, 'telnet connection closed' EOFError: telnet connection closed

[@davidthompson9359]

David, what comes in the courses? I've been working Cisco Networking for almost 20 years and want to get into the programming and the newer SDN technologies. Even though I've worked in the field this long I still haven't had a certification higher than CCNP because of issues with testing. I worked in a server farm bigger than a football field but that was old Cisco when version 11 and 12 were king. Other than your courses, what are other good materials to combine with what I know and move forward?

[@Notoraj]

Thank you for your those inspiring words

[@davidbombal]

You're welcome! Much appreciated :)

[@renaneler]

Thanks, great tutorials!

[@davidbombal]

Thank you for watching!

[@subhashdabhade3960]

Hi David, Its nice video series. Thanks shring such a fantastic video. Moreover i have query, Whicgh version of GNS3 required for python?

[@nehasharma-1909]

Sir, Can we write a script which takes ping rtt value & wait for 2*rtt time and again ping?

[@samama4u]

Hi, Thank you dear for you great work.

[@davidbombal]

You're welcome Abdul. Thanks for the feedback!

[@abdullahabdi9093]

Just amazing

[@youtubejunky3449]

Great films man! Really hope you can get away from GNS3 tho as hell of a work installing this software and you lose on viewers as some may not have the patience, especially young ones. Your content itself is amazing tho, really appreciating your effort done here! Great JOB!

[@davidbombal]

Hi Alex, firstly, thank you for the feedback. I appreciate it. I find GNS3 to be fantastic software. Old engineers like me remember the days when we had to buy expensive hardware as there was no other option. GNS3 even with its issues is great in comparison to spending thousands of dollars on equipment. Have a look at this: kzbin.info/www/bejne/Y2LWl3WEqM2jnac - start of a series showing different options.

[@youtubejunky3449]

True, one more thing is that I'm stuck with getting all these iso's for routers, switches etc, like do I need to download them manually or is there some name for a packet of them and a way to install them all at once? I'm kinda terrified of ammount of work I would need to put in installing all these onto GNS3 especially that this would be a work that wouldn't teach me anything apart from mastering the touchpad to the counterstrike level using installation GUI

[@youtubejunky3449]

Like I mean nothing wrong in a benedictical work, but I just want to start to follow your tutorials and for now I'm stuck coz I dont know if I need to install ioses of all these different routers, or if I can follow your tutorials without them? If so can you briefly tell me how?

[@leonidas300755]

Beatifull! Thank you!

[@mihirshah042]

Hi David, All your videos are awesome and really helpful I wanted to learn more by purchasing course on GNS3 academy. You provided a link for $10 course but when i opened, it shows $39

[@manojkbn]

Excellent !!!

[@tega2rule]

thank you David

[@davidbombal]

My pleasure!

[@TheGlobalNetworker]

is this kind of a Good Network engineer learning Python to improve his work... or Strong Python programmer pickup domain knowledge of Networking and move into specific industry ?

[@quality89]

your very good, thanks

[@alinmuntean2916]

LOVE IT!!

[@refaiabdeen5943]

Cheers Mate !!

[@genghis_khan_]

Nice video. Will all cisco ios be able to be automated using python?

[@Prashanthkadem]

TQ man!!! informative.

[@davidbombal]

Thank you!

[@mohamednazaras]

Hi David....Thanks for shared video. Could you please share how to install VM and inside VM how to install GNS3 and required application associated with that for to learn python for network...Just I am asking how to add doctor container and other switch and router iOS.Pleade share the link you already uploaded......Note: if any one knows pls share the link.