We extend our previous topology with a few new routers to demostrate how the PIM Assert mechanism work. This time we configure PIM with dense-mode…

In the previous multicast post we configured the RP statically. If we have a lot of routers this solution is not going to be scalable…

We continue the previous multicast lab. This time we take a look at how RPF check works, how we can prevent RPF failures, and how…

These features allow us copy the traffic of a switchport or an entire VLAN and send the copied frames to another switchport. This destination port…

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…

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…

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.

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…