Archive for the ‘networking’ Category

Here’s my presentation from container.camp: If you’re interested in a deeper dive then take a look at the Container Networking Tutorial I did for ONUG.


Weave is an overlay networking system for Docker containers. Whilst Docker can already link containers on a single host, Weave provides connectivity for containers that are spread across multiple hosts. It has been released under the Apache 2 open source license by Zettio, a new company targeting ‘apps for the zettabyte era’ founded by RabbitMQ […]


One of the big news items from last week’s VMworld was the launch of EVO:RAIL, a ‘hyperconverged infrastructure’ reference design with software from VMware and hardware from a variety of partners. The RAIL part of the name comes from the smallest unit of deployment that fits into 2U of standard rack space, and onto a […]


This post originally appeared on the CohesiveFT blog The Docker subsystem available since version 3.5 allows additional virtualized network functions (VNFs) to be run on VNS3. I’ve previously written about using this capability for content caching, SSL termination and load balancing. This time I’ll cover using it as a network intrusion detection system (NIDS). Introducing Suricata […]


Conventional wisdom says that high performance networking needs inflexible hardware based on application specific integrated circuits (ASICs). That same conventional wisdom says that software implemented networks – aka Network Function Virtualization (NFV) – are slow, particularly if implemented on top of the convoluted networking stack in Linux. Snabb Switch defies that conventional wisdom by putting […]


This post originally appeared on the CohesiveFT blog Want to do more with your AWS Virtual Private Cloud (VPC)? We have 10 ways you can enhance cloud networking with our virtual appliance, VNS3. First, a quick background on the product: VNS3 creates an overlay networking on top of AWS infrastructure. This allows you to control security, topology, addressing and protocols […]


Facebook have announced their own switch design, codenamed ‘Wedge’, saying that it’s already being tested in their production network. In many ways the switch is unremarkable; it uses the same Broadcom Trident II merchant silicon ASIC that most other high end ‘white box’ top of rack (TOR) switches use, and it uses Linux on a […]


The cloud price wars that began at the end of March have been all about compute and storage pricing. I don’t recall hearing network pricing being mentioned at all; and indeed there haven’t been any major shifts in network pricing. Photo credit: Datacenter World Network is perhaps now the largest hidden cost of using major IaaS providers, […]


I wrote a few days ago about my first failed attempt to do this. After some perseverance, and with some lessons learned along the way I’m pleased to say that I now have it working. Given that VXLAN (at least in the Linux kernel implementation) needs multicast I’m still not sure that this is a […]


This seemed like a good idea, as VXLAN has been in the Linux kernel since 3.7. TL;DR – this doesn’t work as I’d hoped. The two major issues being: VXLAN needs a multicast enabled network, which rules out most public clouds. Instability – I’ve managed to provoke multiple kernel panics on stock Ubuntu 14.04. Background […]