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TCP_IPVol1_Chap3_exer3_GNS3_topo

[Networking Lab] Static route and load sharing practising (TCP/IP Volume 1)

This GNS3 laboratory is a simple reproduction of the Configuration exercise number 3 of Chapter 3 (static routing) of the well known book TCP/IP Volume 1 for the CCIE professional development. I think it is a very good practice to review the configuration of static routes to achieve redundancy with utilization of floating static routes […]

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[Networking] Select a mask so that there will be a specific number of subnets and hosts available

This is mainly a reminder for myself and for who is working with subnetting and with the always arising question about how to work with subnets design. The question to answer today is: you are given a network and you are asked to find a netmask so that you will have a defined number of […]

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[Linux server] How to update DNS entries from DHCP to BIND9

After talking about this topic with a friend during last week, I decided to start running a local DNS server in my home network. The goals of the server are: first, have my own local domain and, second, use it as DNS cache. In this ways I can recall my local servers/devices using their assigned […]

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GNS3 802.1x Topology

[Networking Lab] Configure 802.1x authentication on Cisco switch IOU with GNS3

In this post I will show you again the power of GNS3 in doing laboratories to test new features. I will provide you a Lab example to configure and test port-based 802.1X authentication over a wired connection having a Windows Server 2012 configured as AD, DHCP and NPS/Radius, a switch running on IOU Layer 2 […]

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GNS3 ready to use

[Networking - Lab] Ready-to-go GNS3 Switch and Routers config for your lab.

A lot of times, when you would like to reproduce some behavior in a Network, you need to add a lot of basic configs on your routers and switches. You need to add loopback, ip address, unshut interfaces, create vlans, activate SVIs, configure access ports and so on. If you have not too much time, […]

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Tunnel GRE + IpSEC Topology

[Networking] Alternatives to packet tracer (was: Softwares to build a virtual lab)

Maybe this article will not bring to your knowledge something new, but it happened to me in the recent past that not all the friends and collegues I was talking with were aware of some of the best softwares a Network guy can use to practice with technologies that are in use in the market. […]

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