Hello, In this document, I am going to represent how DR is elected in different cases. I have to skip some pictures since there would be so many pictures to demonstrate all the cases. I will try to explain them. In general, there will be the followin...

Hello everyone, In this document, I am going to present how outbound route filtering can efficiently filters routes without occupying link bandwidth. I am going to use two simple methods to filter BGP routes and then introduce ORF. The following topo...

Hello everyone, In this document, I am going to present how prefix suppression in a WAN topology with many transit links can reduce the size of the routing table. In a WAN topology with many routers and almost full-mesh, there will be many transit li...

Hello everyone, In this document, I am going to represent how Route Target Constraint (RTC) can highly reduce the number of routes advertised by route reflector to route reflector clients in MPLS VPN environment. The configuration is very simple but ...

Hello everyone, When there are two ABRs connecting two areas, we should connect them via two links. For example, if there are two ABRs between area 0 and area 1, we need to connect them through two links, one in area 0 and other one in area 1. It ma...