The aim of this post is to explain basic concepts in the networking field such as Virtual LANs (VLANs), Port Types and Interfaces.
(more…)Posts archive for May, 2017
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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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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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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