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…
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