I know… (I have lost some of your email)

January 29, 2020
I know, I know…
by Pablo Narváez

I know I haven’t posted new content so far, I’ve been quite busy with my current endeavors. Also, trying to figure out what to do with my career for now… Multiple paths (á la ECMP) ahead of me…

Just wanted to ping all of you! Also, I just received some email a few days ago but I just couldn’t read it… I migrated all data to a new phone and I happened to delete the email content before being able to access it on the new device (duh!).

If you sent me a message in the last few days, please resend it to me!!! I will be glad to answer (promise to read them promptly).




Well, hello there…

July 23, 2018
It’s been a while
by Pablo Narváez

It’s been a while…

Since my last post. I’m glad I still have regular visitors although I haven’t posted new content for a few months now.

I just updated my profile and the ABOUT section to reflect my new responsibilities at Palo Alto Networks. I still work quite a lot with SDN, automation, data center and networking, and had to dedicate some more time to Cybersecurity and Cloud.

Since I knew I had to stop blogging until I felt comfortable at my new job (I changed jobs by the way!), I just gave up the wordpress premium account although I kept the domain name.

Once I fully comeback to my blogging endeavors, I will reconsider to upgrade my account so you can enjoy a better look & feel.

For my next posts, I will consider some of the following topics:

  • Arista MSS with Palo Alto Networks NGFW (Next Generation Firewall)
  • Palo Alto Networks VM-Series Bootstrap and Cumulus Networks Fabric Automation with Ansible
  • Aruba Networks CX-OS Automation with ALE (Analytics and Location Engine)
  • Some Palo Alto Networks NGFW and Traps endpoint testing across a fully automated Arista/Aruba Fabric (Malware samples might be used!)

Thanks for reading!



Arista Layer3 Spine-Leaf w/ VXLAN (L3LS-V): Lab Part 1

July 11, 2017
Lab, Introduction
by Pablo Narváez

This is the first post in a series where I’ll go deep on how VXLAN is deployed on Arista switches and how it operates in a Layer 3 Ethernet fabric.[Post-2]network_diagram-1

For this lab, I will create a self-contained virtual environment so physical appliances will not be used at this time. Please note, the IP Storage, Services and Border Leafs will not be deployed yet; once we are done with VXLAN, I will add new features and functionalities including the extra Leafs.

Hardware and versions to be used in my lab:

• 2x HPE DL-360 ProLiant Gen8 server
– 2x 64bit 8-core Intel Xeon processors (E5-2650)
– 128GB RAM
– 4x 300GB SAS drives (sda, RAID 0)
– 2x 1TB SAS drivers (sdb, RAID 0)
– 1x iLO dedicated GE network port
– 4x embedded GE network ports
– 1x 10GbE dual-port network module
• 2x HPE DL-360 ProLiant Gen8 server
• Ubuntu 16.0.4 LTS with KVM
• VMware iESXi 6.5
• Arista vEOS 4.17.5M

I will provide detailed instructions for what to do (and configure) on every device. Equipment and operating systems versions may change along the way, so I will make appropriate notes wherever needed.

As stated before, I am going to follow this up with a series of articles focusing on the different infrastructure layers; as those articles are released, the links will be updated here:

  • Lab Part 1: Introduction (this article)
  • Lab Part 2: Virtual environment setup (next up)
  • Lab Part 3: Production servers deployment
  • Lab Part 4: Configuring the Ethernet fabric
  • Lab Part 5: Running and testing VXLAN

Hello World

Article, my first post
by Pablo Narváez

July 10, 2017

Here it is, my first post.

*** Just a thought ***
I follow several tech blogs, many of them have been inspiring (especially a recent post by Ethan Banks from Packet Pushers) so… another reason I decided to write more formally is just to speak  my mind…

Those other humans in your life are the victims of your one-track mind. Ultimately, you, too, are a victim as those relationships slip away. Anything uninvested in withers to nothingness. You’ll find that virtual routers, technical textbooks, and certification plaques are cold companions.”

Thanks for stopping by!