Topics related to routing
BGP is a routing protocol used to dynamically route packets in the correct destination. In order to accomplish that, there are some parameters to examine in order to identify which path is the best and which one should be added… Continue Reading
Forwarding engines provide the mechanisms for packet switching, forwarding and route lookup. When the packet enters the router, either it will be forwarded (to the next-hop or itself ) or dropped. In order to perform packet forwarding ( switching )… Continue Reading
Designing a stable and scalable OSPF topology requires thought and planning. In larger networks, OSPF can have an impact on the workload of the router. The number of routers in an area, the number of adjacencies and the stability of… Continue Reading
BGP does not require neighbors in the same subnet. Instead it uses TCP connection in port 179 to establish neighborship and neighbor IP is configured specifically. Also BGP doesn’t use an integer metric for route selection. Instead it uses path… Continue Reading
Policy-based Routing (PBR) is a method that a router ignores the “normal” process of forwarding packets based on the routing table and forwards it based on the configured policy. The incoming packet is captured by the policy before the router… Continue Reading
When EIGRP removes a successor route (a route learned from a successor – or in other words the next hop for this route) and no alternative path exists, meaning there is no feasible successor in the topology table ( show… Continue Reading