Implementing Unified MPLS (Part 1)
Because of scalability reasons we might have multiple IGP processes running within our core network. If we have many routers and prefixes we might have…
Read more →This is my blog, I've been preparing for my CCNP exam, so I mostly write posts about networking stuff recently: Routing/switching, BGP, OSPF, Multicast, MPLS VPNs, Security, QoS etc. Currently I have the CCNP ENARSI, the CCNA and the Linux+ certifications, I also have a degree in telecommunication.
I sometimes create educational videos, check out my YouTube Channel: Networking Explained
Because of scalability reasons we might have multiple IGP processes running within our core network. If we have many routers and prefixes we might have…
Read more →To practice for my CCNP ENCOR I've been creating simple Python scripts recently. I've got a few Raspberry Pis and temperature sensors lying around at…
Read more →By default the IGP metric (ISIS/OSPF cost) determines how the packets are forwarded within the MPLS core. With MPLS Traffic Engineering (TE) we can be…
Read more →We continue one of my previous VPLS topology: this time we're going to take a look at what happens from the perspective of the service…
Read more →In the previous post I created the VPN tunnel between the two sites with a crypto map. This implementation is very static, the ACLs define…
Read more →We continue the previous IPsec lab with basic troubleshooting. If you haven't read part 1, read that post first before you continue. So what are…
Read more →In this lab we're going to establish secure communication between two private subnets located at two different sites over an unsecure network (the internet for…
Read more →After going through how we can configure Profile 0, this time we're going to take a look at two other profiles which both require mLDP.
Read more →Previously I wrote a few posts about how multicast works but only within an enterprise environment without MPLS. This time we're going to take a…
Read more →This time we're going to configure OSPF, but not with the CLI, we're going to use a network automation tool called Ansible. I'm going to…
Read more →After going through inter-AS Option A, B and C, this time we take a look at the CSC implementation. This is very similar to the…
Read more →How can a router detect when a BGP neighbor, or just any kind of IGP neighbor device goes down? If the two devices are directly,…
Read more →We're going to continue the previous inter-AS L3VPN Option C lab, and in this post we're going to be focusing on customer GREEN who runs…
Read more →We finish the inter-AS L3VPN series with Option C: As I foreshadowed in the end of the of the Option B post, Option C is…
Read more →In the previous post we've seen how we can set up an inter-AS L3VPN with Option A. We continue this lab, but this time we'll…
Read more →What if a single customer wants to have an MPLS L3VPN service, but he has to connect with his CE routers to two different service…
Read more →I've been learning BGP on IOS-XR recently. Configuring inbound or outbound BGP policies on IOS-XR is quite different than on IOS-XE or regular IOS. On…
Read more →The issue of the previous Route Reflector (RR) design is that it is not protected from a single point of failure: if a RR goes…
Read more →If we have many iBGP routers within an AS, to solve the scalability issue of the full-mesh requirement we can deploy one (or more) iBGP…
Read more →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…
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