In today's post I wanted to talk about the widely used Ping command. Which is one of the best methods (I think) to begin network troubleshooting. When part of the network goes down it is sometimes hard to figure out why? When you issue the ping command or the extended ping command in a Cisco router several ICMP codes …

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network-diagram In a perfect world we would never need redundancy on a network infrastructure, but as you know as well as I know we don't live in a perfect world. Hardware will eventually fail, bottlenecks will appear, and the speed of our network will become slower when we max the bandwidth on links. So having …

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In today's post let's talk about CDP the Cisco Discovery Protocol. This protocol helps us in two ways, it first helps us verify that a connection between router or switch is set up correctly at least up to layer two in the OSI model. This also helps us discover Cisco devices that are in are network and which interfaces …

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Couple weeks ago I talked about routing protocols and in the post I mentioned two routing protocol features distance vector and link state. Although these protocols fundamentally do the same thing by getting information on remote networks they get this information in a different way. For today let's introduce distance …

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Cloud-Computing-icon Before the internet and general networking become popular into what it is now, there were and still are routing protocols that only do classful routing. What is classful routing? When I was talking about Dynamic Routing earlier (See the post Dynamic Routing Protocols) I mentioned there was a …

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