When working with AWS, there are plenty of features that make your life easier, but it's rare to find a feature that feels like magic...
Before we dive into the magic, what's the problem we're trying to solve? When working with servers anywhere, usually there needs to be some sort of remote access to SSH or RDP and install/troubleshoot
At re:Invent 2018, AWS announced the Transit Gateway, finally giving us a native solution to provide scalable transit connectivity. After attending sessions and deploying Transit Gateway, I wanted to dive into the solution and see what is possible.
In case you haven't read the official docs, the AWS Transit Gateway is a regional layer3 router connecting VPC,
Can the AWS Certified Advanced Networking Specialty exam be legitemately passed with only a few weeks of studying? Yes.
Is there a secret shortcut? No.
Although there is no shortcut, I will discuss my previous experience, study materials, and general impressions of the exam. If you have already been working with AWS networking, and wondering what it takes to be
Ansible 2.5 just came out, and with it comes new network modules (and the network_cli and netconf connectivity methods). The new modules allow us to manage certain IOS configurations without always depending on the "ios_config" module, while the network_cli connectivity method means we don't always need to configure a "provider" for every
A couple years ago I posted how to Optimize Ruckus Configuration, and since then I've been continually tweaking so that my dense, multi-story WiFi environment performs well with Windows, Mac OSX, and mobile devices. Here are my current optimizations:
Note: This is based on Ruckus ZoneDirector 10.0.1.0 build 44
System Wide:
If you have worked with AWS networking, you know there is a laundry list of items that need to be initally configured so the environment is ready for use:
Since AWS is a software defined cloud datacenter,
When executing an ansible playbook, you may get the following error:
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: paramiko.BadHostKeyException: Host key for server switch-name does not match!
This probably happened after you changed the name of your network device, and generated new RSA keys. Or, if you are using DNS
On day two of Networking Field Day, Pluribus Networks gave us a rundown on what is possible with their Netvisor OS, whitebox hardware, and a distributed architecture. I was impressed with the flexibility of the solution, but like any design choice, there are some limitations to be aware of.
As a relative newcomer to the Pluribus world, I wanted to
A couple years ago, my coworker wrote a great post on finding disk space issues in Linux and how to resolve them. Helped me out this weekend when a critical server was having issues, so wanted to post it here:
http://www.randomlyexpressed.com/diagnosing-linux-disk-usage/
For future reference (after reading the post above)
Show filesystem usage:
~$ df -h
Show all