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OSPF topology

[Networking Lab] GNS3 Lab to practice with OSPF LSA types and areas (TCP/IP Volume I)

Here we go with another Lab with GNS3 and IOU. This time is to review and practice the OSPF configurations as well as LSA types, Areas, routing table, virtual links and whatever you’d like to study for OSPF. The exercise rebuilds the one reported in TCP/IP Volume I book on Chapter 8. The topology is […]

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GNS3 - RIP and RIPng TCP/IP Volume 1 Topology

[Networking Lab] RIP and RIPng configuration exercise (TCP/IP Volume 1)

Hi there! Yet another GNS3 laboratory for a bit of practice. This time I arranged the starting configuration to play with RIP and RIPng following the exercise found on TCP/IP Volume 1, Chapter 6. As always, let me provide you with the topology picture: This time the picture is also showing what are the configurations […]

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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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