Carrier Supporting Carrier (CSC) MPLS L3VPN
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 →Welcome to my website!
This is my blog, currently I've been preparing for my CCNP exam, so I mostly write posts about networking stuff: Routing/switching, BGP, OSPF, Multicast, MPLS VPNs, Security, QoS etc.
Check out my YouTube Channel: Networking Explained
Implementing High Availability with Bidirectional Forwarding Detection (BFD)
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 →Implementing OSPF Sham-link
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 →Implementing Inter-AS MPLS L3VPN services with Option C
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 →Implementing Inter-AS MPLS L3VPN services with Option B
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 →Implementing Inter-AS MPLS L3VPN services with Option A
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 →BGP on IOS-XR: Route Policy Language (RPL)
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 →BGP Route Reflector Design Options (Part 2): Hierarchical 2-tier Route Reflectors, MCIDs
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 →BGP Route Reflector Design Options (Part 1): Inter-Cluster Peerings
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 →Configuring Multicast routing (Part 4): PIM Assert, Designated Router, Null Register
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…
Read more →Configuring Multicast routing with PIM Sparse-Mode (Part 3): Bootstrap Router (BSR)
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…
Read more →Configuring Multicast routing with PIM Sparse-Mode (Part 2): RPF checks, static mroute
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…
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