Collection of useful, relevant or just fun places on the Internets for 20th March 2013 and a bit commentary about what I’ve found interesting about them:
Configure an HP OpenFlow Switch for Floodlight | NetworkStatic | Brent Salisbury’s Blog – Brent continues with real world posts about SDN & OpenFlow deployments with screencasts. ( Because Brent is acutally delivering and testing real OpenFlow solutions today. No sh*t, real OpenFlow).
This is a revised tutorial to configure an HP OpenFlow switch for Floodlight or any other OpenFlow controller. HP revised its firmware a few months back which is great. HP has been supporting OpenFlow on its switches with generally available code longer then any other networking vendor. Other vendors with GA OpenFlow firmware are Brocade and Pica8. Maturity of OpenFlow agents should be taken into account when purchasing hardware. Most agents are Open vSwitch based but vendor allocations to software development of porting OVS has been slow while waiting on large volume customer demand.
SDN: Forget about “THE HOW” for a Second – Jason Edelman’s Blog – Good remember it’s what you get out of technology (SDN in this case) rather than how it’s done.
A few weeks ago I created a presentation in which the goal was to summarize “the what” and “the why” of SDN. After talking about the why (exaggerated by saying networks suck), I talked about “the what.” I broke down “the what” into four quadrants. These quadrants were Programmability, Controller Based Networking, Network Functions Virtualization (NFV), and Overlays. The bottom half, NFV + Overlays, was really meant to capture the complete view of network virtualization. One can then accomplish network virtualization by using technology from the top 2 quadrants, i.e. leveraging a controller (that hopefully creates abstractions) with programmatic interfaces (north and southbound) that automates provisioning of L2-L7 network resources. Technology from each quadrant can be deployed individually or altogether.
So, do I love iApps so much that I will hug them and squeeze them and name them George? As a hardened cynic, I have a hard time being overly enthusiastic about any technology, but I say that iApps are a useful, time-saving tool. In that sense, I like them. I have no great desire to agonize over an application’s architecture to figure out what is required of the LTM *if* there’s a ready-made iApp blessed by F5 and the application vendor. Any time saved doing provisioning work frees me up to perform other tasks, of which there’s an endless supply.
Will I actually try to build my own iApps? We’ll see. Sounds interesting. How hard can it be?
F5 is yesterday’s technology. Sad to see them go.
9 Hazel Rules to Increase Your Productivity | Mactuts+ – Excellent tutorial on using Hazel on the Mac for system automation that anyone can use.
Video – Fiber cleaning and testing – The Network Sherpa – I didn’t know that fibre cleaning was even a thing. Now a video from John Hariignton showing how to clean your fibre.
It’s time for another video. This time I’m covering some useful tools for handling fiber cleaning and testing in the datacenter.
Smart Optical Switching – Your Plexxible Friend – Lame Journal – Plexxi was at Network Field Day 5 and John Herbert writes up their technology which is unique (uses a DWDM ring for a DC networking).
If you want to add a switch, remove a switch or otherwise interrupt the links between them, the controller can be asked to migrate traffic off the affected switch / links (obviously you want to do this during a low traffic period, since you’ll be reducing bandwidth in the mesh). The idea here is that you can make those changes without interrupting traffic as would happen in a classic network. By proactively migrating traffic away, there’s no active traffic to impact.
If you are interested, Plexxi recorded a sponsored Packet Pushers Podcast Show 126 – Plexxi & Affinity Networking With Marten Terpstra – Sponsored
Cruft – Google Stops Enforcing Blocked Sites In Search Results – I also noticed this recently but didn’t follow through. I use Google Chrome for research for this reason – the ability to block search results. Like Mike, I absolutely loathe Experts Exchange (it’s basically spam for search engines) and many other sites that clog up search results.
A few years back, you could block sites from showing up in search results. This let users like you and I customize results and get rid of unwanted results. In my case, Experts Exchange is useless to me but they almost always take a high position in results. I blocked Experts Exchange and that was a good day. At some point, Google disabled the ability to block sites in anything but Chrome, obviously in a attempt to push folks to their own browser but for the rest of us, blocked sites remained blocked.
It might be a feature for more conscious users of the Internet but can’t see how this makes sense. The google relevance for searches is simply not that good.
I’m still not doing well at working only 40 hours per week. Somehow, stopping at only 40 feels wrong. But I’m getting more comfortable with the idea. I’ve noticed that letting minor issues roll to the next day doesn’t incur the wrath of anyone, and that when I do tackle tasks while rested and charged, I’m better able to get them done. I’m still keeping up, I’m less stressed, and overall I have a better sense of well-being when I limit the number of hours I’m working. Still, there’s more to it that Sara captures well.
VMware’s NSX End Game Is Hybrid Clouds – Network Computing – I wrote this piece for Network Computing about VMware NSX announcement. Once you get through the cheap shots at the networking industry, Nicira delivers what I expected. A controller platform with smart software doing routing, switching, firewalls and load balancing. And that’s just to start.
VMware this week announced NSX, a network virtualization platform that combines its VMware vCloud Network and Security (vCNS) product along with technology from its billion-dollar acquisition of Nicira.
While the initial intent of VMware NSX is to virtualize the data center network, I believe VMware’s long-term play is in hybrid and public clouds. Here’s how NSX helps VMware get there.
Fragmentation Needed: Rambling on about IP fragmentation – Chris Marget continues to amaze & wonder.
I found myself wondering about the fragments I saw at my customer’s edge recently, so I banged together a little script to visualize the packets arriving at the edge. Basically, I’m plotting fragment size vs. time, and color coding things so that I can recognize fragments from whole packets, and to pick out fragments which have arrived out of order.