Green IT was one of the hot issues back in 2009 during the hype of server virtualization and the introduction of 10 Gig. During the Cisco Networks in 2009 (Barcelona) Cisco EnergyWise was then greatly pushed as an innovation and as a cornerstone for Smart Buildings and Green IT.
The principle thought behind the technology is that the network can also communicate with the endpoints connected to the network and that the network can ask / tell the endpoints to lower down the power consumption in order to reduce the power footprint of the environment. For example, at night time IP Phones in an office network don’t need to have full power, as nobody is working. So EnergyWise can power down the IP phones during the night.
Continue reading “My first steps with EnergyWise”
Cisco enables a mini (mini) cloud at the branch
Cisco introduced Digital Network Architecture (DNA) last year as a new architecture for the digitialized agile world that is becoming a reality at a very fast pace. The DNA is built upon design principles such as security everywhere, automation (enabling centralized service management), virtualize everything, analytics and openness. Key to these design principles is that software is not only defining the datacenter (SDN), the WAN (SD-WAN) anymore but also the access layer. So it should be possible to deploy any service anywhere in your network, whether it’s in your Datacenter, the cloud or at the branch.
Continue reading “Cisco enables a mini (mini) cloud at the branch”
Windows 10, Delivery Optimization, SSDP and blocking multicast
I recently ran across the following issue on a DMVPN Hub-Spoke network with some sites. The network was behaving perfectly fine and spokes were happily communicating with the servers behind the hub until windows 10 came along… Continue reading “Windows 10, Delivery Optimization, SSDP and blocking multicast”
Cisco Champion 2017
So, last thursday I received an e-mail from Cisco that I was selected as one of the Cisco Champions for 2017. I’m very proud and happy to be part of this program for this year and as far as I’m concerned, more years to come. Continue reading “Cisco Champion 2017”
DMVPN DualHub EIGRP Traffic Engineering
With the advance of vDSL, Fiber, cable Internet and the appropriate SLA’s bussiness Internet connections have become increasingly reliable. By choosing the local ISP’s carefully it is much more interesting for a company to replace the MPLS connections for an Overlay network based on redundant Internet connections. As a result businesses quite often obtain a higher speed connection for much lower rates. One of the business cases I made in 2006/2007 had a 70% decrease in annual costs compared to their European WAN line based on an MPLS service provider including High Availability. Continue reading “DMVPN DualHub EIGRP Traffic Engineering”