It is common to allocate /24 or /22 subnets to a single VLAN but William writes to ask why and whether is related to broadcasts. What is the best subnet size for VLAN allocation and why ? The answer isn’t what you think.
Howard Marks from Deep Storage and long-term curmudgeon sent Ethan & I the following email: As I continue to tilt at the VMware windmill I’m facing […]
No. When compared to the operation of existing networks, SDN is much more secure.
IP Telephony is an end stage market. Here is why.
Collection of useful, relevant or just fun places on the Internets for 12 December 2014 and a bit commentary about what I’ve found interesting about them:
I’ve spent some hours taking a look at Docker containers and how they connect to the network. The short summary is “messy” and better description […]
Out of sheer frustration this week, I tweeted this and got a big response: The Back Story I’ve wasted about 60 hours of customers time working with resellers & vendors to get a quote for a relatively simple network upgrade. Neither the vendor staffers or the reseller employees knew how the product was licensed or […]
Chambers pointed the finger at Net Neutrality for a slow down in purchasing by carriers in US markets and that he perceives it as damaging to Cisco business interests. I find it more credible that SDN/NFV is slowing capital investments than some far off political change.
So, sure, you COULD run NSX and ACI in the same network. No, you WOULD NOT run NSX and ACI in the same network.
Kaspersky published a research note on Black Energy malware that uses backdoors and exploits on Cisco routers to install a TCL file, perform surveillance or destruction of the device configuration. And, they revealed that their Cisco routers with different IOS versions were hacked. They weren’t able to connect to the routers any more by […]
In their Q3-2014 VMware results, the revenue from “services” is 30% larger than licensing revenue. What does this mean for customers ?
This is some of Russ White’s finest writing on the career development using a lecture from CS Lewis as a baseline
The rise of software licensing in networking changes some of my assumptions about the 5 year cost of ownership of products. Roughly, lets assume that you are buying virtual appliances like firewalls, DNS/DHCP, IDS/IPS, proxy servers and load balancers and that you pay some type of yearly license to use the product. Capital Upfront The legacy […]
Smart Televisions are tracking everything you do and sending that data to unknown services: The amount of data this thing collects is staggering. It logs where, when, how, and for how long you use the TV. It sets tracking cookies and beacons designed to detect “when you have viewed particular content or a particular email […]
Blessay (Deep Content)
LEDE: One of the hardest parts of DevOps movement is explaining the unique value to IT Leadership in conventional organisations that rely on ITIL principles. I'm having success by framing the debate in terms of over-capitalised on assets and under-invested in human infrastructure. Three … [Read More...]
This article continues the discussion from Human Infrastructure Poverty in the Enterprise - Part 1 Replacing CapEx with Open Source Enterprises have been reluctant to embrace open source and often state that training, expertise and support for open source are a major risk factor. Yet there are … [Read More...]
Is Enterprise IT starving its operational process by reducing headcount and overcapitalising on assets ? If so, what arguments can we make for or against this idea ? CapEx Rich but Living in OpEx Poverty Is it a misconception that heavy capital purchases can reduce operational costs ? The last 20 … [Read More...]
The Network Break is a new Packet Pushers podcast where we discuss "state of the business" in networking and enterprise infrastructure. Andrew Conry-Murray and I discuss vendors moves and news, product and ploys, analysis on product and positioning, and look at the business of networking in a short … [Read More...]
Big Switch Networks (BSN) launches Version 4.0 of Big Cloud Fabric for hardware-centric SDN data centre fabric. The Data Centre Fabric solution clearly shows the maturity gained from 5 years of shipping products while adding innovation in switch hardware through Switch Light operating system. At the … [Read More...]
When planning network architecture for the next few years, I believe that it is important to comprehend that the network is just a one part of an overall system. The ITIL foolishness that drive most IT infrastructure processes prevents clear systemic thinking and I'm often having to explain how the … [Read More...]
The future of private infrastructure ownership is moving to a new model combines the old with the new that I describe as “dolls and babies” where the major transformation in infrastructure ownership is the transition from having babies to owning dolls. Infrastructure as Babies Enterprises buy … [Read More...]
In discussions with a stealthy networking startup today, we were discussing how their overlay network technology for an SDN-enabled WAN was able to to detect network blackouts and brownouts in the physical network. Their answer was to run Bi-directional Forwarding Detection (BFD) in the overlay … [Read More...]
Can the Internet be the “Cloud Network” ? If so, when could the transition happen (if it hasn’t started already) ? Supposition/Hypothesis As a technology, the Internet has strikingly similar properties to sharing Compute and Storage as ‘Cloud’. A large pool of resource that can be used or shared … [Read More...]