Have been receiving email with questions on OpenFlow/SDN and looking for a definition blog post that explains how East/West and North/South LAN design can work with Northbound/Southbound APIs
There is an old saying “A man with his eyes fixed on Heaven doesn’t see where he is going”. It’s an almost perfect description of how the major vendors are bringing Software Defined Networking to the market.
The consistent message from all the vendors and especially the Cisco, Juniper and Brocade is that there are “no use cases for SDN”. In the last three months, this has been a constantly repeated statement both publicly and privately. This beggars belief that vendors can’t see immediate needs that deliver long term gains.
I suspect that the root of this problem is the big companies want to solve big problems. And by solving big problems they figure that they can make big revenue. Alright, I get that. It’s understandable that large organisations need a constant revenue stream to feed the insatiable maws of their shareholders. However, the vendors re also missing the most real and immediate problem of networking today. Simply, Networking is too hard.
Vendors haven’t developed tools that keep the complexity of networking under control. Complexity can be reduced to this: “I don’t have big problems, I have lots of small problems.” You can have debates about addressing complexity and how to attack it, but it nearly always boils down to this: start small.
You can deploy some modern firewalls in Layer 2 mode such that they are transpart
Internets of Interest is a conceit of mine where I collect useful, relevant or just fun places on the Internet and a bit commentary about what I’ve found interesting about them. With the Open Network Summit 2012 happening last week, there was an avalanche of hype from the mainstream press. I’ve attempted to pick something off […]
Quote of the Day about Spanning Tree
Juniper QFabric is a new approach to Ethernet Switch Fabrics. When it was announced last year,it was noted that the underlying physical design is a completely different approach to building Switch Fabrics. Here I’m taking a loosely research based approach to understand how Juniper QFabric is different from all other approaches to the problem, and also a look at some of the challenges ahead.
Short Answer is “It depends, but usually yes.” Long answer follows with a discussion of launch power, receiver sensitivity, and cable losses.
I’m pleased to announce that Big Switch have agreed to sponsor SDN & OpenFlow Webinar on February 7th, 2012 and that the event will be free and open to anyone to attend.
Are you a Network Architect or Designer ? Are you responsible for strategy, long term vision, or simply keeping track of upcoming technologies ? If so, you will need to know more about OpenFlow and Software Defined Networking and how it impacts the future of Networking in software and hardware.
And now, thanks to sponsorship from BigSwitch Networks, anyone can attend.
I’ve been doing some research into Ethernet and the use of Jumbo frames for some content I’ve been writing and come across something interesting. The documents state that Jumbo frames can only be used on Full Duplex Ethernet connections.
Saw this modular data centre rolling down the highway today.