While attending an influencers event at Intel in Portland, Oregon I got into a discussion with Kelsey Hightower @kelseyhightower and Keith Townsend @ctoadvisor on the nature of Docker networking and its plugin architecture.
The post PQ Show 59 – Docker Network Plugin Architecture appeared first on Packet Pushers.
Service providers are starting to embrace container technology to deliver more dynamic, distributed applications
Until there is a universal standard which states how to access network devices I believe SNMP is the best option when it comes to determining what a device actually is. While SNMP’s glory days might be long gone, if there in fact were any. There are still some instances where SNMP is more handy than the modern APIs we have now. All network devices respond in the same way to SNMP queries. This can be compared to a REST API where you have to know the URL of the API before you can target a device. Even with SSH which is also a standard the implementation differs between various vendors, while this doesn’t matter if you are connecting to the device manually it does if you are using a script. Looking at Netmiko a Python library for SSH, you have to specify device vendor and class when you connect. This is because SSH doesn’t work the same with Cisco devices, compared to HP devices, as prompts and paging work differently. However with SNMP it always works the same, sure all vendors have specific MIBs that they use. But general queries for standard MIBs work the same. Using a standard MIB it’s possible to identify the manufacturer of a device and often it’s version. Continue reading
“The future of the WAN is NOT . . . a router.”
These bold words were spoken by Riverbed’s Josh Dobies in a presentation to the delegates at Networking Field Day 10 this August, as a lead in to the first public announcement of “Project Tiger.”
Riverbed explained that the SteelHead appliances perform WAN optimization in sites with highly contended bandwidth. The SteelFusion appliances offer both “hyperconverged infrastructure” and WAN optimization. For sites that have plenty of bandwidth, however, there’s no Riverbed product you can put there and that–for Riverbed at least–is a problem. Riverbed’s proposed solution? Ironically, it’s an appliance that can act as a WAN router, but with some rather unusual features.
The headline features of Project Tiger as I see it, are:
Surprisingly absent from that list, however, is WAN Optimization. Despite being Riverbed’s core competency, this is not a feature of the Project Tiger appliance. Because Continue reading
Tail-f sticks to its multivendor roots and declares a YANG revolution.
We move on to the next topic:
1.3 Identify common applications and their impact on the network
When you work in networking, it’s important to have an understanding of how applications work and what are their characteristics. Is it sensitive to packet loss? Is it sensitive to jitter? What ports does it use? Let’s have a look at some of the common applications that you need to be aware of for the CCNA certification.
HTTP
HTTP is the most important protocol on the Internet. The major part of all traffic from the Internet is HTTP. With sites like Facebook, Youtube, Netflix, this will not decrease in the future, rather web traffic will dominate even more. HTTP is normally run on TCP port 80 but it’s possible to run it on custom ports as well. Because HTTP runs over TCP, it is not very sensitive to packet loss and it does not have strict requirements for delay or jitter. However, people still don’t have a lot of patience for a web page loading and if there is a lot of packet loss, it may affect streaming services such as Netflix or services where downloading/uploading of files is done. From a Continue reading
Every time I’m explaining the intricacies of new technologies to networking engineers, I try to use analogies with older well-known technologies, trying to make it simpler to grasp the architectural constraints of the shiny new stuff.
Unfortunately, most engineers younger than ~35 years have no idea what I’m talking about – all they know are Ethernet, IP and MPLS.
Just to give you an example – here’s a slide from my SDN workshop.
Read more ...In this post, I’ll show you how to use Docker Machine in conjunction with VMware Photon OS Technical Preview 2 (aka “TP2”). Given that Photon was designed to host containers, this is—for the most part—pretty straightforward. There are a couple of glitches that I need to point out, though, that might hang up new users.
First off, kudos to Fabio Rapposelli for taking some time at VMworld to help me work through the details. I really appreciate his time!
If you want to use Docker Machine with Photon, there are four major requirements today (stress the word “today,” as all these products are rapidly evolving and these requirements may soon disappear or change):
You’ll need to use Fabio’s special build of Docker Machine that includes support for AppCatalyst and Photon OS. I anticipate that support for AppCatalyst and Photon OS (the latter of which is what’s really needed in this case) will get rolled into Docker Machine (main branch) soon, but for now a different build is needed. (If you don’t use Fabio’s build, Docker Machine will report an “unrecognized OS” or similar).
You’ll have to use Docker Machine’s generic driver. Even Fabio’s branch of Docker Machine doesn’t yet (to Continue reading
VMware has been "working organically" on NFV with telcos. Now it's ready to deliver more formally.
Machine learning is an emerging technology that could significantly affect networking, including security, predicting the effects of changes, bug detection, and more.
The post Machine Learning For Networks: It’s Coming appeared first on Packet Pushers.