Ending the vQFX shenanigans – changing the serial number

Have you ever encountered this really nasty “bug” where your vQFX will turn into the Linecard (LC) Role? Yeah – welcome to the club!

Thankfully you can avoid this (most of the time if the vQFX shows some mercy) by changing the Serial Number. My guess is, that the vQFX sees the remote PFE with the very same S/N and tries to bind to it – which will fail and therefore put the RE into the LC-state.

First power up your vQFX – you will immediately be presented with the current S/N during the very first messages when the RE boots:

Login as root and edit the file called /boot/loader.conf (trust me, it’s there) πŸ˜‰

Scroll down to the very bottom and you will see the S/N:

Now you need to know a bit of vi-magic: use the shortcut “dd” to delete the line where your cursor is at (or manually go to the edit mode and delete the last line). Save the file (:wq!) – if you don’t force(!) it, the device will tell you this is a “read-only” permission. After that, reboot the RE.

Notice now, that this time during boot, there is no S/N – so the Junos bootup routine will generate a new one for you:

After the device boots, you can either issue “show chassis hardware” or re-enter the same /boot/loader.conf file to see our new and shiny S/N – with this, the vQFX will not try the usual shenanigans again – well, hopefully…

Hope this helps you on your Lab-Quest πŸ™‚

Slides from Webinar “Creating a Juniper lab with EVE-NG” – Jan18 2023

As always – here are the slides from today’s webinar including all the Links needed in order to fetch the vDevices πŸ™‚ If you encounter any problems feel free to reach out to me anytime! Thank you for joining and making these Webinars a success πŸ™‚

Twitters new Toxic Rules – Goodbye Twitter!

If you think Elons Ego couldn’t hit a new low, think again…

Twitter just enforced new Rules:

I believe in free speech, a connected and open community, and the right to choose a platform of liking without being “punished” for it. Therefore, I can not and definitely will not accept the new terms of Twitter and will therefore terminate my Account effective immediately! But don’t worry – my main contact point was always here and not on Twitter πŸ˜‰ You can also:

Follow me on Mastodon: @Juniperchris@mastodon.social | @chsjuniper@mastodon.social
Follow me on LinkedIn: https://www.linkedin.com/in/chsjuniper/
Follow me on YouTube: https://www.youtube.com/netchron/
Follow me in the J-Forum: JChris929 (former CHS-929)
Send me a Mail: chs [at] ip4 {dot} de

What does this mean? Will you delete your profile on twitter?
Not at this time – My Twitter Account will be used as an archive for interested folks but will no longer post any updates or any news.

My new DayOne GREEN Book is out :)

If you love your garden-power-plant you shouldn’t look at my new DayOneGreen Book πŸ˜€
I had some free time and used it to write a teaser for my new book, which will hopefully be published in 2023 πŸ™‚

It is extremely important to me to pass on knowledge – that has always been my attitude.

In three examples I will show you how you can save a lot of money by virtualizing your lab environment and at the same time reduce your CO2 footprint – even more with the Juniper vLabs – even in small environments.

Incidentally, at #Axians we are constantly developing new ideas together with #JuniperNetworks to make networks even more efficient and “simpler”. At the end of the day, solutions must also be manageable for small teams – that’s a challenge we accept πŸ˜‰

Feel free to contact me if you have any questions.

Download the PDF here:

Make sure to check out the DayOne Library:

And if you are interested in virtualized Labs here’s the Link to my official OpenLearning Course:

Slides from Webcast: Creating a Juniper lab with EVE NG

Hi all, here you find (as promised) the slides from my last talk πŸ™‚
If you have any questions or encounter problems feel free to reach out to me πŸ™‚

For a quick “Juniper only” Lab you can also use the vLabs functionality to get started with JunOS and use your EVE-NG Server for your bigger, more customized Labs: https://jlabs.juniper.net/vlabs/

Juniper TechFest 2022 (virtual)

Next week, starting on Oct 17, TechFest2022 is happening πŸ™‚ Unfortunately still virtual – hopefully we will have local TechFests in-person next year. Nevertheless, this TechFest is packed with lots and lots of great Sessions (on-demand sessions). And this one is very special for me because for the very first time I’m not “just” a partner/visitor, but also a speaker – yup – little Christian is finally wearing a bigger pair of pants πŸ˜‰ Seeing my name next to my idols is somehow terrifying but also exciting at the same time πŸ™‚ I really hope you all enjoy the talk that I had with Ola and the mighty Steve Puluka about automation. Let me know in the comments what sessions you are interested in the most πŸ™‚

IoT-Nerd on PacketPushers

Hooray! The latest Episode of PacketPushers might be something that some of you have been waiting for: I had the honor to talk with Christopher Young and Ethan Banks about “Home IoT at scale”. It’s always fun to talk with like-minded professionals about implementations, limitations, security aspects, and basically how to push the limit of sensors more and more!

IoT will be a critical part of our everyday life – IoT is already happening if you like it or not – there’s no running away from it. This brings new challenges like IPv6-Security (and yeah – for this, you finally get to learn IPv6 – GREAT, right?), Wireless Security, Sensor Security, and Software / Patch management – something that the average User never had to deal with. But without it, he/she’s basically giving away the house key to the front door. Vendors are constantly working to bridge the gap between security and comfort for the user – curious to see what the future brings πŸ™‚

Here’s the Link: https://packetpushers.net/podcast/heavy-networking-625-home-iot-networking-at-scale/
If you have any questions – you know where to find me πŸ™‚

Building a Juniper EVE-NG Lab-Environment for daily usage – Part 3/3 – Slides

Wow – what a way to end our 3-part-series – a live presentation from one of the EVE-NG gods himself: the mighty Uldis πŸ™‚ If you missed this – you missed something!

As promised – here are the Slides from the last part of our series:

And of course the Video on YouTube (don’t forget to subscribe if you like the video – it helps a lot):

Huge shoutouts go to Uldis – the Insights and the help have been amazing – I cannot thank you enough πŸ™‚
And of course the best host in the universe: Christine – I really enjoyed the sessions.

Hopefully, I was able to embrace your interest in EVE-NG – especially if you want to start labbing with Juniper starting at 0€/USD (well except the server / Laptop you need lol).

Building a Juniper EVE-NG Lab-Environment for daily usage – Part 2/3 – Slides

Thank you all so much for attending the 2nd of our 3-Part-Series Session πŸ™‚
As mentioned I would love if you share your Labs in our Elevate Community:


And as always on my YouTube Channel (Remember to subscribe – cause subscribing makes you feel good) πŸ˜‰

Building a Juniper EVE-NG Lab-Environment for daily usage – Part 1-3 – Slides

Hi all,
thank you SO MUCH for an awesome first Session πŸ™‚

As Promised, here are the Slides from the Session:

The Video can be found on YouTube:

Looking forward to seeing you next week for Session 2 and the week after for Session 3 – if you have any questions (EVE, getting certified, general Juniper question), feel free to reach out to me anytime!