Wednesday, March 18, 2026

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efficiency of innovation

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TEK@link

efficiency of innovation

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GNS3

Multicast Routing: Rather Than Dense, Sparse It And Let’s Meet At Rendez-Vous Point… Part 5/6

dexterd05 mins

In this post let’s detail the operation of PIM (Protocol Independent Multicast) in sparse mode. Previous posts tackled the operation of PIM dense mode. Let’s recall that PIM is the multicast routing protocol that allows PIM routers exchange information needed distribute multicast traffic to receivers. Introduction This blog is a part of a serie of…...

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My First Scapied IPV6 Packet

mehdi017 mins

In this blog, let’s build our first IPv6 packet. Introduction The idea of this lab is to craft an IPv6 packet from scratch using Python and Scapy library. The IDE I use is JetBrains PyCharm Community Edition 2018.3.1 x64 which is available for free at : https://www.jetbrains.com/pycharm/download/download-thanks.html?platform=windows&code=PCC The IDE The IDE interface looks like in…

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Setup A Checkpoint Lab Using VirtualBox And GNS3 On Windows

luffyd06 mins

In this blog, we will setup a Checkpoint lab using virtualbox and gns3 on windows. Introduction In this lab we implement a basic security architecture to demonstrate the operation of a firewall cluster to protect our network. Our “security domain” is segmented into four zones: Security topology Our security topology is compound by two security…...

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EIGRP Over a vNet Trunk

dexterd04 mins

In this blog, we’ll explore the operation of IGP interior routing protocol EIGRP over vNET trunks (another way to say networking trunking similar to vlan trunks used in L2 network by switches to trunks multiple traffics from different vlans into the same physical link) Little introduction New IOS release 15.x introduced Easy Virtual Network (EVN)…...

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VPNv4 BGP AS-Override Feature Into Play!

dexterd04 mins

Let’s put into play AS-Override feature in BGP: see when it applies and how it works. Introduction First, AS-Override feature applies to sites that have the same AS number but are linked by another different domain with different AS number, as in the next figure. In our example AS number 1 has neighborship (E-BGP links)…...

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Let’s Find Out About (Static) MPLS… From The Start!

dexterd07 mins

In this post, we’ll discuss the motivation and a basic operation of an MPLS network. In the first part, we’ll introduce this protocol and our setup (using GNS3) that put it into play. We’ll try next, to explore the functionnality of this protocol using a very simple and basic example using both Cisco and HPE…...

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