Imagine that you have two or more sites which you want to connect together using MPLS technology. You cannot afford dark fiber and your Service Provider cannot offer you L2 connections of any kind. The only thing your SP can offer is L3 transport. Still, you want to build your own MPLS environment and there … Continue Reading ››
A few days ago I installed two additional NICs in my server that handle the virtual machine for vCenter Server Appliance (vCSA).
After the NICs installation, the Management web interface for vCSA was showing some strange error (see image below).
Let's assume that you have an IPv4 core backbone on which you did enable MPLS. Your customers are connected to your PE routers and they need to have IPv6 reachability between their sites. To have things more clear, please have a look to the following network topology: Continue Reading ››
If you are in routing and switching industry, it's almost impossible not to hear words like MSFC, PFC and DFC in relation with Cisco Catalyst 6500 series, chassis, supervisor and modules. If you didn't yet, you're not almost there, working with large enterprise environments. Even if I see an increasing use of … Continue Reading ››
Cisco Live 365 describe this as:
"Anthony Sequeira, CCIE, CCSI educates students on four key cornerstones for success in the journey to CCIE. These cornerstones include technical knowledge, study and lab strategies, proper mindset, and physical wellness."I can tell you it's not essentially a technical knowledge session, and Anthony Sequeira mention this couple … Continue Reading ››
In the last weeks I was working closely with a Cisco Telepresence team to identify a issue regarding poor performance of the video systems. We did find pretty quickly the issue as being the failure of auto-negotiation of Speed and Duplex on the connection between Cisco switch port and Tandberg endpoint devices. This was the … Continue Reading ››
The original name of this video is "SDN controller DEMO". I think the "demo" word there is a bit inappropriate used, as actually is more like a Cisco marketing video than demo. Don't be so surprised, you know how Cisco promote their products. Just my 2 cents about the SDN/OpenFlow trend that is coming up these … Continue Reading ››
For most of us, network engineers, the IT world means anything but art. Still, it seems that out there somebody think Wifi can be use to generate art. And they did a pretty good job. Timo Arnall, Jørn Knutsen and Einar Sneve Martinussen had this idea to explore the invisible terrain of WiFi … Continue Reading ››