Recently I’ve been working on a Practical OSPF deep dive training course on Youtube. The content of the first module is available for free on Youtube: For those of you who prefer learning by reading,… Read More »OSPF Training Course – Module 1
Two types of Broadcast IP addresses exist: the Local Broadcast IP address and the Directed Broadcast IP address. In the current networking world, they mostly serve the same function. But one of them contains an… Read More »Local Broadcast vs Directed Broadcast
Whenever possible, Routers should have multiple paths (or routes) to get to a target network — this is a key component for network resiliency. Which means Routers routinely compare routes to choose one preferred path… Read More »Route Precedence — How does a Router choose its preferred path?
When connecting two sites together using a Virtual Private Network (VPN), a common issue that is encountered is trying to build a VPN with overlapping networks — where both sites happen to use the same… Read More »VPN with Overlapping Networks
BGP is the predominant dynamic routing protocol used to exchange routes between different autonomous systems. BGP’s popularity lies in the Path Selection process which allows extremely granular control of the path for incoming and outgoing… Read More »BGP Oldest Path
EIGRP is a routing protocol whose strategy to prevent routing loops is based upon what is known as the EIGRP Feasibility Condition. EIGRP also makes use of another concept called Split Horizon, which we will… Read More »EIGRP Feasibility Condition
The EIGRP Metric has caused confusion for many network engineers trying to understand the protocol. This article will dive into what the metric is, and how to boil it down into its simplified form. Formula… Read More »EIGRP Metric
Anyone who has ever studied the EIGRP protocol has at some point or another been confused by the awkwardly defined terminology that is incorporated into the protocol. This article’s purpose will disambiguate all the EIGRP… Read More »Understanding EIGRP