Collection of useful, relevant or just fun places on the Internets for 10th February and a bit commentary about what I’ve found interesting about them:
Out of Nillo’s mind: Some musings for old networkers … – This article talks about the fact the SDN-like networking technologies of history have failed badly.
NewBridge on the other hand had a radically different approach. They had a very strong management solution (the 46020) coming along from the TDM and FR ages. Essentially for them, a software running on a server would control the setup and management of PVCs and SVCs alike! … better, it could interface through APIs with an application layer for, say, deliver IP and VoD services to ADSL consumers for instance …
It’s my belief that software development, and software tools, make it mor e likely to succeed this time. Especially the software testing tools that catch bugs.
show brain: Hey Window! You Make a Better Door Than You Do a Window. – I love War Stories
As I did a visual sweep of the room I saw that the window in front of the AP (I know this isn’t ideal, but we rent the building.) was partially open such that the metal frame of the window was just about centered in front of the radio. I asked the clinician whose office it was how long the window had been open. They told me it had been open for about 2 hours… exactly the amount of time that the bridge had been having problems. I promptly closed the window and presto the signal strength went back to normal and the duty cycle returned to normal as well. Once again, the network was undone by the Human Network.
Ferros’ First Law of Networking – Check the Physical. Because it’s something like cable or power most of the time.
Nicira, BigSwitch, NEC, OpenFlow and SDN « ipSpace.net by @ioshints – Ivan sums up the market positioning that exists today in the major OpenFlow networking players. He is not looking at L4-7 products here either, just the L2/L3 switching part of the SDN market.
EMC VFCache (aka “Project Lightning”) Is One Small Step, But an Important One – @SFoskett – Stephen Foskett, Pack Rat – Best technical summary of EMC’s VFCache announcement. Has graphs for performance.
Perhaps the biggest limitation of the initial VFCache offering is its limited applicability to enterprise server virtualization environments. VFCache uses a filter driver installed in each VM guest, and includes no hypervisor drivers though there is a vCenter plug-in. This makes VMware vMotion very tricky, involving scripting to remove and re-add storage. This means VMware SRM will not easily work, and there is no support for clustering, either.
It’s worth noting that EMC have OEM’d a Microsoft PCIe Flash Drive card and added some software drivers to act as a local cache on the server which is directly the opposite to what the Storage Array value proposition is. Seen some articles wondering if EMC is planning to move into servers, and also pondering of the Flash Array avalanche has caught them unprepared. Who knows, maybe both are true but it’s a significant change in the storage industry and might change our network designs due to load profiles.
EMC Enters The Market With “Me Too” Flash Products | The Storage Architect – Great market summary of what the EMC VFCache announcement means to users from Chris Evans.
EMC have ratified both the PCIe SSD and dedicated flash array markets with their announcements of Lightning and Thunder. At this stage they are bringing only “me too” products to the market, with other vendors out there having already delivered more advanced technology than being announced today.
Clash of the New Network Titans? | Ethernet Fabric-Curt Beckmann impressed me at the OpenFlow Symposium with a measured and blanced view on OpenFlow – points out that the future of networking is far more complex. The future holds different types of networking, – software, hardware and formware driven models.
In summary, I meekly submit that there really is no controversy, and the technologies don’t compete (except in the way that markedly different forks compete). Instead, there are places for each, places for both, and places for neither. As an illustration, I’ve built the following complex (not-so-much) and exhaustive (even less) table of use cases for each category:
F5’s Certified Firewall Protects Against Large-Scale Cyber Attacks on Public-Facing Websites | Newsroom | F5 Networks – Finally. F5 is now certified by the ICSA as a firewll. Of course, an BIG-IP is much more than a fierwall but I was never able to convince corporate security professional that it was a firewall without a valid certfication. This is long overdue.
nDPI is a ntop-maintained superset of the popular OpenDPI library. Released under the GPL license, its goal is to extend the original library by adding new protocols that are otherwise available only on the paid version of OpenDPI. In addition to Unix platforms, we also support Windows, in order to provide you a cross-platform DPI experience. Furthermore, we have modified nDPI do be more suitable for traffic monitoring applications, by disabling specific features that slow down the DPI engine while being them un-necessary for network traffic monitoring.
An open source deep packet inspection library for stream analysis. I find it fascinating that we are now able to collate this much data about network protocols from just a few people. Not so long ago, we needed a $30,000 sniffer to be able to recognise just a few thousand network protocols.
Why I Like Juniper’s QFabric (And A Mea Culpa) – Network Computing – Mike Fratto at Network Computing.com does a good summarising Juniper QFabric after recently getting a deep dive on the technology.
Here’s why I like it. It’s operationally simple. The distributed chassis metaphor is apt and means that multi-switch management is greatly simplified. You can manage up to 128 switches as if they were a single switch, which for all intents and purposes, they are. Think about that for a moment. You don’t have to maintain credentials across 128 switches or authentication configuration if you are using RADIUS or some other authentication server.
(Disclosure: I do writing for Mike & Networking Computing).