Short Take – Culture and Technology
In today’s Network Collective Short Take, Russ White discusses his take on the intersection of culture and technology.
Russ White
The post Short Take – Culture and Technology appeared first on Network Collective.
Cryptocurrency API Gateway using Typescript+Workers
If you followed part one, I have an environment setup where I can write Typescript with tests and deploy to the Cloudflare Edge with npm run upload. For this post, I want to take one of the Worker Recipes further.
I'm going to build a mini HTTP request routing and handling framework, then use it to build a gateway to multiple cryptocurrency API providers. My point here is that in a single file, with no dependencies, you can quickly build pretty sophisticated logic and deploy fast and easily to the Edge. Furthermore, using modern Typescript with async/await and the rich type structure, you also write clean, async code.
OK, here we go...
My API will look like this:
| Verb | Path | Description |
|---|---|---|
| GET | /api/ping |
Check the Worker is up |
| GET | /api/all/spot/:symbol |
Aggregate the responses from all our configured gateways |
| GET | /api/race/spot/:symbol |
Return the response of the provider who responds fastest |
| GET | /api/direct/:exchange/spot/:symbol |
Pass through the request to the gateway. E.g. gdax or bitfinex |
The Framework
OK, this is Typescript, I get interfaces and I'm going to use them. Here's my ultra-mini-http-routing framework definition:
export interface IRouter {
route(req: RequestContextBase): IRouteHandler;
}
/**
* A route
*/
export interface IRoute Continue readingList of EVPN and DC-related IETF drafts (as of 1H 2018)
Ethernet Virtual Private Network (EVPN) solution is becoming pervasive for Network Virtualization Overlay (NVO) services in data center (DC) networks and as the next generation VPN services in service provider (SP) networks. As a result of this popularity a lot of work is going on in IETF in this area. In this post I collect links to some of the interesting IETF drafts in this area.
All this information is relevant for 1H 2018 timeframe. Keep in mind to pay attention to which version of draft you’re reading – this drafts are frequently updated.
Service Chaining using Virtual Networks with BGP VPNs
This document describes how service function chains (SFC) can be applied to traffic flows using routing in a virtual (overlay) network to steer traffic between service nodes. Chains can include services running in routers, on physical appliances or in virtual machines. Two techniques are described: in one the service chain is implemented as a sequence of distinct VPNs between sets of service nodes that apply each service function; in the other, the routes within a VPN are modified through the use of special route targets and modified next-hop resolution to achieve the desired result.
Telecom Policy: What the US Can Learn from the EU
As telecom operators roll out 5G, the US should steer clear of the heavy-handed regulation like that of the EU in order to ensure all citizens gain access to the speedier mobile technology.
MTU and TCP MSS
The largest chunk of bytes that a transport protocol can forward across specific medium is called MTU – Maximum Transmission Unit. If we speak about Ethernet, which is today the most common, he has by default 1522 bytes MTU. The story about MTU is that the MTU of specific protocol basically defines how much payload (or highest protocols headers + their payload) it can carry in its biggest packet, not counting his own headers. Putting more payload into single packet than the MTU allows will result in fragmentation, the process of slicing the frame into more smaller frames so that
The post MTU and TCP MSS appeared first on How Does Internet Work.
Debugging data flows in reactive programs
Debugging data flows in reactive programs Banken et al., ICSE’18
To round off our look at papers from ICSE, here’s a really interesting look at the challenges of debugging reactive applications (with a certain Erik Meijer credited among the authors).
… in recent years the use of Reactive Programming (RP) has exploded. Languages such as Elm and libraries such as Reactor, Akka, and Rx are being used by companies such as Netflix, Microsoft, and Google, to build highly responsive and scalable systems.
The rise of reactive programming fits well with the increasing need to process streams of data. In a reactive program, you set up a data processing pipeline and then wait for input to arrive.
Many RP implementations share a notion of a collection that abstracts over time, in contrast to space like standard collections. This collection comes in different flavors, such as Observable (Rx)… the implementations differ in the precise semantics of their collections, their execution model (push/pull) , and the set of available operators.
While in theory events and threads are duals, in practice the RP abstraction works very well for expressing streaming pipelines. If you have an abstraction over time though, Continue reading
Viptela SDWAN Overview
Viptela is an SDWAN company that was recently purchased by Cisco. In this post I will go over the components that make up the Viptela secure extensible network (SEN) solution. By the end of this post you will have a good idea of the pieces that make up the Viptela puzzle. Network...Viptela SDWAN Overview
High level overview of the Viptela SDWAN solution.Bharti Airtel’s Chairman Sees 5G Slicing as a Solution to Net Neutrality Debate
He promised on behalf of the “mobile operator fraternity” that they will never throttle speeds.
OpenStack Summit Vancouver recap: What we did and what’s next
A few weeks ago, I set out to the beautiful city of Vancouver’s convention center, along with a boatload of rocket turtles and a stellar team. It was a great time with a wonderful scenic view of the ocean. I’ve been at Cumulus a few months now, but I can’t help but enjoy looking around, seeing the friends I’ve made in the industry, and the friends and companies Cumulus has worked with over the years. It is exciting to have thousands of people coming together at OpenStack Summit Vancouver to work on a shared goal.
This year, we were lucky enough to have our very own Pete Lumbis take the stage with David Iles of Mellanox to present our joint solution around the latest SDN revolution, which is centered on creating efficient virtualized data center networks using VXLAN & EVPN.
In the next few paragraphs, I’ll share some highlights of the event, some photos, and a recap of that exact discussion. There was a lot to learn and discover, and I’m excited to share the details.
Day 1: Don’t you just love working with collaborative open source projects?
On our first day, lots of things were going on — we Continue reading
Train Your Team With INE And Reap The Benefits Of Becoming A Cisco Partner
Training with INE will not only keep you team on the cutting edge of the industry’s leading networking technologies, it will also put you on the path to becoming a Cisco Partner; a tangible way to show clients that you’re on the forefront of Cisco technologies and training. Cisco registered partners enjoy access to a wide variety of Cisco channel partner tools and are eligible to apply for Cisco certifications and specializations.
Additional Benefits Include:
- Credibility: Capitalize on the Cisco Brand, which commands recognition and respect in the marketplace.
- Credentials: Market your certified Cisco Expertise as a competitive differentiator to customers.
- Momentum: Join the value-add partner program that is setting the pace in the industry.
- Rewards: Add value for customers and drive growth and profitability with Cisco.
- Relationships: Position your company to take advantage of more sales opportunities than ever before.
There are three levels of certification that a team can achieve; Cisco Select, Premier and Gold. Each level requires certain prerequisites, which INE’s industry-leading network training can provide. The three types of certifications are:
For more information contact our training advisors at [email protected] or by phone at +1-877-224-8987 or +1-775-862-4344 (outside the U.S.)
A Tale Of Two – Well, Three Or Four – Kubernetes
It is safe to say that VMware would have been perfectly happy if Docker containers had never been invented. …
A Tale Of Two – Well, Three Or Four – Kubernetes was written by Timothy Prickett Morgan at .
IPv6 Buzz 003: IPv6 In The Enterprise
Today's IPv6 Buzz podcast tackles the slow uptake of v6 in the enterprise, and how that might affect IoT, cloud, and network programmability strategies.IPv6 Buzz 003: IPv6 In The Enterprise
Today's IPv6 Buzz podcast tackles the slow uptake of v6 in the enterprise, and how that might affect IoT, cloud, and network programmability strategies.
The post IPv6 Buzz 003: IPv6 In The Enterprise appeared first on Packet Pushers.