Implementing VPLS part 2: BGP Autodiscovery
In the previous post about VPLS implementation we configured the remote PEs manually under the VFI, like this: This solution is not scalable if the…
Read more →Implementing MPLS L2VPN services on SR OS part 1: Epipe
We're going to configure Layer 2 services for customers over an MPLS cloud using SR OS routers. First we're going to take a look at…
Read more →Troubleshooting OSPF adjacencies
I've been experimenting with different router images and I tried to establish the OSPF neighbor adjacency between a Cisco and an Alcatel (SR OS) router.
Read more →Configuring Multicast routing with PIM Sparse-Mode (Part 1)
In this post I'm going to walk through how we can configure basic multicast routing using PIM Sparse-Mode. I'm going to walk though how the…
Read more →Protecting Stateless/Stateful DHCPv6 server with DHCPv6 Guard
In this lab I'm going to use the same simple topology which I used in this post. Except that we're going to take a look…
Read more →Configuring QoS Policer at the Provider Edge router
I'm going to configure a policer to restrict and meter the traffic coming from Customer 1 on one of the PE router. The topology I'm…
Read more →Configuring IPv6 First-Hop Security (RA Guard, IPv6 Snooping)
In this lab we're going to implement IPv6 FHS with Router Advertisement Guard and IPv6 Snooping and in the following post I'll show how to…
Read more →Implementing STP Root Guard and Loop Guard
These two are optional features we can configure with Spanning-Tree. They are mutually exclusive: we configure one or the other, but you cannot configure both…
Read more →Configuring E-LAN (VPLS) service over the MPLS cloud using CSR1000v routers
I'm going to build a L2VPN service for Customer 1 sites (purple), and create an "emulated" switching environment within the MPLS core: CE1, CE3, and…
Read more →How to secure Apache2 webserver with SSL
Nowadays every major website operates over HTTPS, aka have that little padlock next to the URL in our browsers. It means that we can establish…
Read more →How to set up an NFS server and share files on Linux
With the help of NFS we can share a filesystem via the network. On the client side we can mount the NFS filesystem just like…
Read more →LVM – Logical Volume Management in Linux
With the implementation of LVM we can reallocate storage space and extend our storage volumes really easily. In the example below I’d like to show…
Read more →iptables – NAT MASQUERADING in Linux
In a previous post I wrote about how can we accomplish NAT with Cisco devices. This time let’s examine how can we implement the same…
Read more →Configuring MPLS L3VPNs – Part 2
After finishing the MPLS configuration in this post, I thought to take a closer look at the MPLS network, especially the labels: with the help…
Read more →Create your own VPN with Wireguard
In this post I’m going to describe succinctly how to configure your own VPN on a remote VPS with Wireguard. Of course you can host…
Read more →Configuring MPLS L3VPNs and VRFs in GNS3
I’ve been learning to configure MPLS and VRFs recently. I’m using GNS3 network emulator with real Cisco IOS images since other simulators such as Packet…
Read more →Different NAT configurations on Cisco’s IOS
Recently I’ve made some Packet Tracer practices, I’m going to share the commands I’ve issued on Cisco routers, and describe the configuration of different type…
Read more →Measuring the power draw of my PC and PS5
A few posts ago I showed how to measure power consumption with Shelly’s IoT device. In this post I’m going to share my measurement results…
Read more →How not to install fiber optic
I’d like to share this picture, I shot this in a village near Budapest. It represents the Hungarian ‘jólvanazúgy (TM)’ philosophy perfectly (if you don’t…
Read more →Troubleshooting transmission lines and passive RF parts
I have made some test measurements with a network analyzer, I would like to share my results and experiences in time dimensions measurements. Instead of…
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