The Catalyst8000v is Cisco’s virtual version of the Catalyst 8000 platform. It is the go to platform and a replacement of previous products such as CSR1000v, vEdge cloud, and ISRV. When installing a Catalyst8000v, it comes with a builtin shaper
Modifying Administrative Distance of Specific BGP Route
In one of the Discords that I’m in there was a user with a complex network consisting of a mix of DMVPN, BGP over MPLS VPN circuits, and SD-WAN. For some prefixes, the path via the private MPLS is preferred,
Using Python to Calculate Cisco SD-WAN Tunnel Numbers – Part 2
In the first post I shared with you my code to calculate tunnel numbers in Cisco SD-WAN. I’m a beginner in Python so I thought it would be a great learning experience to have someone experienced in Python, such as
Using Python to Calculate Cisco SD-WAN Tunnel Numbers – Part 1
When using Cisco SD-WAN on IOS-XE, it uses tunnel interfaces to configure parameters of the implementation. There is a mapping between what interface the tunnel is sourcing from and the name of the tunnel interface. For example, if the tunnel
Viewing a Certificate Using OpenSSL
I have started taking Ed Harmoush’s Practical TLS course to learn more about TLS and certificates. When learning about TLS, you want to inspect different certificates to see the various fields and see how different organizations use certificates differently. As
My Journey to Getting AWS Certified Advanced Networking – Specialty Certified
Last week I took and passed the AWS Certified Advanced Networking – Specialty exam on my first attempt. In this post I will describe the study materials that I used and talk about my experience of taking this test. What
Getting Experience with Public Cloud
Someone reached out to me and asked how you get experience with public cloud. That’s an excellent question so I thought I would give some perspective on it. There are three ways that immediately come to mind: Studying for a
8 Tips for a Successful Network Migration
I have done many network migrations over the years. Now a days it’s a more rare event but this weekend we migrated some Core switches with very little down time. What are some of the things that you should do
Python Script Pulling AWS IP Prefixes – Part 3
The two previous posts described what the script does and modules used as well as how the script leverages YAML. This time, we will go through the function that generates the access-list name. The code for this is below: The
Python Script Pulling AWS IP Prefixes – Part 2
In the previous post I described some of the design considerations for this script and what modules I use. In this post, we will look at using YAML to collect data and use it in Python in the form of