9 Easy Ways to Break a Cisco Network
Every day operation of a Cisco router is likely to cause failure.
The post 9 Easy Ways to Break a Cisco Network appeared first on EtherealMind.
Every day operation of a Cisco router is likely to cause failure.
The post 9 Easy Ways to Break a Cisco Network appeared first on EtherealMind.
From an atomic museum to a sci-fi center, Vegas has lots of nerdy attractions.
Some background on the Free Range Routing project.
The post Response: Why a new routing stack? – Russ White appeared first on EtherealMind.
The company's cost reduction plan didn't go far enough.
Data center fabrics are built today using spine and leaf fabrics, lots of fiber, and a lot of routers. There has been a lot of research in all-optical solutions to replace current designs with something different; MegaSwitch is a recent paper that illustrates the research, and potentially a future trend, in data center design. The basic idea is this: give every host its own fiber in a ring that reaches to every other host. Then use optical multiplexers to pull off the signal from each ring any particular host needs in order to provide a switchable set of connections in near real time. The figure below will be used to explain.

In the illustration, there are four hosts, each of which is connected to an electrical switch (EWS). The EWS, in turn, connects to an optical switch (OWS). The OWS channels the outbound (transmitted) traffic from each host onto a single ring, where it is carried to every other OWS in the network. The optical signal is terminated at the hop before the transmitter to prevent any loops from forming (so A’s optical signal is terminated at D, for instance, assuming the ring runs clockwise in the diagram).
The receive Continue reading
In our previous Getting Started blog post, we discussed how to install Ansible Tower in your environment.
Now we’ll discuss how you can equip your Tower host with users and credentials.
To begin, let’s cover the essentials: setting up your user base and creating credentials for appropriate delegation of tasks.
Building your user base will be the first thing you’ll need to do to get started with Tower. The user base can be broken into three easily-defined parts:
1. User: Someone who has access to Tower with associated permissions and credentials.
2. Organization: The top level of the user base - a logical collection of users, teams, projects and inventories.
3. Team: A subdivision of an organization - provides the means to set up and implement role-based access schemes as well as to delegate work across organizations.
There are three types of users that can be defined within Tower:
Following the general session highlights from DockerCon Day 1, we’re happy to share with you the video recording from general session day 2. All the slides will soon be published on our slideshare account and all the breakout session video recordings available on our DockerCon 2017 youtube playlist.

Here’s what we covered during the day 2 general session:
Ben started off his DockerCon Day 2 keynote with key facts and figures around Docker Commercial Adoption. To illustrate his points Ben invited on stage Swamy Kochelakota, Global Head of Infrastructure and Operations at Visa to talk about their journey adopting Docker Enterprise Edition to run their critical applications at scale in a very diverse environment.
During the day 2 keynote, Lily and Vivek reprise their 2016 roles of dedicated burners, finally returning from Burning Man to get back to their jobs of enterprise dev and ops. Ben returns as clueless business guy, and decides to add value by hiring a contractor, who Continue reading
Pluribus' Adaptive Cloud Fabric operates without a controller.
Everyone’s guessing the mystery bidder is Verizon.