It is kind of a database using which the network nodes are able to identify and forward the IP packets to a required destination. “Routing table” is probably one of the most popular terms used in the networking domain. Introductionīefore talking about specific Routing tables and Cisco Express Forwarding, it is important to understand what a Routing Table is and where is it used. So, the base Routing Tables will be our primary focus in this article. But, whether the native IP forwarding or MPLS based forwarding, both require Routing tables to forward the IP packets to the correct destination. The use of MPLS labels to forward IP packets is much more efficient than using the native IP forwarding. In the last article where we discussed the MPLS basics, we learned that the data packets flow through the MPLS network using the concept of labels. Also, apart from the base routing tables, we will focus on Cisco Express Forwarding (CEF), the currently used, high-speed forwarding mechanism for IP packets across the network(s). RIB and FIB act as a foundation for the MPLS based routing tables, a topic we will cover in a separate post. They can also contain manually configured paths (if required). These tables do not require MPLS to be enabled on the networking nodes and are automatically created using the routes advertised by the routing protocols. RIB and FIB, that are also considered to be the base routing tables. In this post, we will delve into the Routing Tables i.e.
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