VLANs, Trunks, Port Types and Interfaces

The aim of this post is to explain basic concepts in the networking field such as Virtual LANs (VLANs), Port Types and Interfaces.

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May 30, 2017 L2 Technologies, Training No comments yet

Wannacry and NHS Lothian

I was reading the Spanish news when I first heard about Telefonica being attacked by an unknown ramsonware. The situation seemed to be quite critical, according to the news this malware was able to spread quite easily and some Telefonica’s customers apparently were impacted as well.

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May 17, 2017 Blog No comments yet

Dynamic Multipoint VPN (DMVPN) and IGP Routing Protocols

Dynamic Multipoint VPN (DMVPN) is a multipoint GRE-based tunnelling technology. DMVPN consists of one or more hub routers that are configured as Next-Hop Resolution Protocol (NHRP) Next-Hop Servers (NHS). NHS, or hubs, are used to create mappings between the public IP address used for the tunnel source (NBMA address), and the private IP address used inside of the tunnel (tunnel address).

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May 17, 2017 DMVPN, Projects No comments yet

Datacenter Application Control Engine (ACE) – High Availability

Although Cisco Application Control Engine (ACE) modules are End of Live, it is still common to find them deployed in Datacenters. The intention of this post is to get a better understanding of a High Availability deployment for Routed Mode with some cases of study.

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May 5, 2017 Load balancers, Projects No comments yet
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