Depending on VMware Workstation version, you may not get an error dialogue! The lack of labbing Ansible has been a struggle of VMware Workstation 15 freezing up with no errors, the Ubuntu VM just wouldn't load when GNS3 was running, and if I starting the Ubuntu VM first GNS3 was throwing errors that it couldn't … Continue reading How to fix VMware Workstation VM freezing issue when running GNS3 along side an Ubuntu VM for an Automation Lab – Time to lab!!!
I just have to admit it - I know just enough Python to understand but not code it! Python is a lot like when I took "Intro to Spanish" in College, I can understand enough to get the drift of what is being said, but I could not speak a fluent sentence to save my … Continue reading Python 3 – Learning it properly this time from Hello World to Scripting, learning Python 3 from scratch Post #1 Completed – Will start #2 soon!
Right when I thought I hit the Summit (CCNP), I realized I was only beginning! After earning my CCNP R/S (and now Enterprise) I have turned my sites into a much less organized approach to studying certain topics that made sense in my mind, however for the benefit of myself and others I wanted to … Continue reading A mountain of FREE Cisco Developer Resources, including setting up a DevNet PC / Free Video Training / Learning Labs / Sandbox / Code Exchange / MUCH MORE!
I am back and going all-in on the CCNA DevNet, and will blog every exam topic! Quick shout out to my current study resources: Cisco $800 Guided Study Group 8-week course that includes Cisco Learning Modules / Access to Cisco Platinum Library and test exams - So this info if the Cisco Curriculum is correct … Continue reading Cisco DevNet Associate – Blueprint Domains / Topics mapped to Posts here – List will continue to grow!
I just absolutely love this graphic, perfect representation of the Cisco struggle! Moving forward I will be posting non-Cert related technologies! Now to that I have earned my CCNP R/S, I've decided to take a breather with some lighter topics such as MPLS Layer 3 VPNs, which apparently are part of the CCIE R/S Syllabus. … Continue reading Though I have earned my CCNP R/S, the Grind never stops my friends, I am just getting started!!! 🙂
On April 5th 2016 (4/5/2016), I made my first post to this blog, and today on October 10th 2019 (10/10/2019) I have passed my final CCNP Exam the TSHOOT 300-135 🙂 Along the way I have hit many major life events that could very well have stopped my progress, gave me a reason to put … Continue reading CCNP R/S Certified – 1,283 days and 286 posts on Loopedback.com later! 🙂
It's been a long couple of years of medical issues that have stopped me from actually taking the exam, but have studied the material over and over, and finally took it today and passed it on the first attempt. I have to say that all of the questions on the exam were absolutely outside what … Continue reading 300-115 SWITCH Exam Crushed! Tips on how I navigated this mentally exhaustive exam for the Pass grade!
Finally after my first two Failed attempts at the ROUTE exam, I have finally FINALLY passed it!!! I have to say I took the first fail as a learning experience, but after some intense brushing up on all topics and failing again, I didn't reschedule a 3rd attempt as I didn't think I wanted to … Continue reading 3 must know tactics to get a “Pass” score on exam day, as can be seen here on my ROUTE exam score printout (finally)! 😀
I will be pounding the pavement with small bite sized chunks of posts up to exam day! I've stalled out a bit in studies getting distracted with wanting to jump ahead to labbing CI/CD and Cloud technologies, so I am going through the DevNet OCG and will be reviewing the notes I find within its … Continue reading DEVASC exam notes – SDLC / Design Patterns / GIT / A ton of Python 3 specifically that will appear on the DEVASC exam (huge section)!
It is round #2 with GIT Merge, and I am ready to resolve some conflicts this time! But first! A couple of things I have read in the OCG and now saw on GitHub when initializing a Repo and cloning a TestRepo Branch: I've seen it enough as a best practice with GIT that I … Continue reading DevNet Quick Notes – GIT Merge Conflict notes and labbed (fixed), Important Unified (GIT) Diff demo and explanation of output(!), and a brief review of ‘Code Review’!
Above shows two different GIT timelines that will and will not merge properly! The term "Fast-Forward" merge is analogous to Fast Forwarding a movie to the good part, as GIT does not care about the filler content that its moving past (Commit history of second branch), as long as there is none of the boring … Continue reading DevNet Not So Quick Notes – GIT Version Control functionality, terminology, branching / merging / conflicts that bested me this post!
It LIVES! The Ansible Automation lab is back! Time to Automate some switch configs! Upon getting the switches configured with their IPs, I got right into the Ansible Inventory File to set both the [all:vars] to set the user/pass/os/connection, and all my different switches in their very similar to my previous lab and I got … Continue reading Ansible / GNS3 Labbing – Configure and verify Hosts in Inventory file, explore Ansible Modules, install GIT in Ubuntu, and wrap up for tonight!
Design Patterns such as MVC above and Observer make software development a breeze! Or at least that is their goal, is to have standardized or well-known Design Patterns that has been refined by other developers, and shared out to the community in different locations (perhaps at Cisco Developer Code Exchange?) that Devs can use that … Continue reading DevNet Quick Notes – Design Patterns MVC and Observer, and BASH (Bourne Again Shell) review of commands and directory tree!
Time to do some GNS3 Switch Automation via Ansible on my Ubuntu Workstation VM! This is the Topology I threw together to begin with, the 3rd octect changes with Workstation NAT / DHCP on vmnet8, I still haven't figured it out but I'd rather spend time labbing. The Ubuntu "Ansible Control Node" and "AutoVM1" to … Continue reading Ansible and GNS3 – Configuring an “Ansible Inventory File” on my Ubuntu “Ansible Control Node” to setup a GNS3 / Ansible home lab!
As I work through the OCG, I will throw up notes on what I cover up to exam day! For more in depth explanations of the theory of topics I would refer to my "DevNet Class" articles for really in depth notes which are good to know, but I will be posting smaller and easy … Continue reading DevNet Quick Notes – SDLC, Waterfall / Lean / Agile Methods reviewed for exam day!
I remember Ansible pointing to Python 2.x being an issue last time as well, but I do a quick lab demo at the bottom to show I am all set to launch out of the dry walls of text, and back into the lab in the coming days / posts before I take my (now … Continue reading Ansible – Some basics / theory before diving into Ansible Labbing in VMware and a GNS3 Network!
I will pick up right where I left off from the previous Intro to Expert thread here! That being said, I will be looking at another noob feeling topic in depth! Python Sequence Types The 5 sequence types are as follow the (first 3 are actually built into Python): StringListTupleRangeBytes / Bytearray What is a … Continue reading Python 3 – Learning it properly this time from Hello World to Scripting, learning Python 3 from scratch Post #1 Completed – Session #2 begins!
Like other Linux distros, CentOS has the commands and tools to monitor a network. Before diving into the network monitoring I will show some changes that are made in CentOS 8 (and also RHEL 8). In CentOS 8 the default service to manage the network-related tasks is Network Manager. First I will show the connections … Continue reading Network Monitor in CentOS 8
Basically, ‘iptables’ is the packet filter system in RHEL systems. The best way to know what is ‘iptables’ is well written on the man page. In this article, I will show some simple and basic ‘iptables’ configurations. The three default chains in the iptables are Input, Forward, and Output. The ‘iptables –L’ command will show … Continue reading IPtables
Pictured above is an awesome CI/CD DevNet Sandbox that unfortunately glitched out! The CI/CD Pipeline Sandboxes seem glitch prone from my experiences tonight, which is not surprising given the complexity, however I will leave the lab up to the point Drone / Gogs glitched out as there was a basic getting it started guide which … Continue reading Cisco DevNet Sandbox for CI/CD, demo but unable to finish due to bug, thoughts on tools for labbing!
A fancy new Discord Server to collaborate / stream your lab / watch other stream! Being that I will be labbing my brains out on DevNet / Network Automation topics, I've created a discord server capable of Voice Channels which also allows for Video / Screen Sharing. I thought this would be a stellar idea … Continue reading New Loopedback Discord Server for Collaborating on labbing / Sharing your labbing / Saying Hello World!
This post will be covering all things Telephony for the DEVASC exam! This and "Compute" platforms (UCS Manager / Director / Intersight) will be the end review of my class, and really I am only going to be a high level overview of these, being its only 15% of the exam among a HUGE pool … Continue reading Week 6 of the DevNet Grind – CUCM / End User Data, Admin XML Layer (AXL), Contact Center / Finesse, and all things WebEx Teams!