Show mac address router cisco how to#

Static routing deals with the manual configuration of routes by the administrator. When dynamic routing is used, routing information is automatically learned and added to the routing table. If multiple routing protocols are used, then you have to implement what is known as вЂњ route redistributionвЂќ, which allows multiple routing protocols to work together and share routing information.ДЄlthough dynamic routing has the advantage of automatically updating the routing table, it has a disadvantage of overusing router resources due to its nature of sending periodic updates. When you opt for the implementation of dynamic routing, note that all routers on the network must be configured with one or more dynamic routing protocols. Some popular routing protocols supported by Cisco routers include Routing Information Protocol (RIP), Open Shortest Path First Protocol ( OSPF), Interior Gateway Routing Protocol (IGRP) and Extended Interior Gateway Routing Protocol ( EIGRP), among others. When dynamic routing is used, a routing protocol has to be configured on the Layer3 devices on the network, in order for them to share routing information. The two major options are dynamic routing and static routing вЂ“ these are basically how routers learn about routes to destination networks. This means when a network topology is created, there has to be some kind of configuration for the devices on that network to communicate with each other. The entire process of building this Routing Table relies on the information from neighboring routers (dynamic routes) or from statically configured entries by the network administrator (static routes).

Show mac address router cisco how to#

This Routing Table contains all known destination networks, how they were learned and how to reach them (outgoing Interface). The вЂњknowledgeвЂќ that a Router has about the way to reach destination networks is stored in the вЂњ Routing TableвЂќ of the device.