Valter
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Solicited-node multicast address
How does Internet work - We know what is networking
Some time ago I was working on IPv6 implementation and in that period I written an article about NDP (you can read it here). After a while I received some comments that is not written well so I reviewed a huge part of it. It looks my english was far worst two years ago that I was really aware of In the reviewing process I realised that NDP usage of Solicited-Node multicast addresses was not clearly explained. This is the follow-up article which should explain how and why Solicited-Node multicast address are used in NDP. Let’s go! Solicited-node multicast address is IPv6 multicast address used on the local L2
How can router decide so fast?
How does Internet work - We know what is networking
Cisco created all sorts of different magic inside their boxes that optimize forwarding processing of packets. Main router function is fairly self-explanatory. Router performs IP forwarding more often called IP routing. IP routing is process of deciding where to send the packet after it was received. IP Routing explained in detail Logic behind IP forwarding is listed in steps here with the assumption it will be an IPv4 packet that was received. This is process switching explained in 11 steps: A frame enters the one of router’s interface First thing that router does is to check frame
I became CCIE# 46173
How does Internet work - We know what is networking
This is the story on how I became CCIE# 46173 To be honest, when I look back, I do not really know the main reason behind going through all this trouble, but I can tell you the story about how I did it. It’s mostly a thriller, and some drama towards the end. I will give you an overview of the whole process including the materials used, videos watched, books read and struggles that I went through. I think that is the right thing to do. This article is for all of you out there who are still trying to study for this exam and need some suggestions.
Cisco VIRL is finally out
How does Internet work - We know what is networking
Cisco finally released long-awaited personal network simulator VIRL. VIRL is a simulator like Cisco CML – Cisco Modelling Lab released few moths ago which is made available for business network simulations and testing in engineering normal day job. With VIRL we got a personal version of CML with drastically lower price tag aimed to help students preparing for Cisco CCNP and more than that for those preparing CCIE lab exam. VIRL will surely help the engineers managing small business network to proof their configuration change before applying it to real network. This solution give us a more stable and “official” GNS3 which will save