1 / 9

Understanding Communication in Logical Networks: Routers and Routing Protocols

This technical refresher session provides an overview of communication mechanisms between devices within a single logical network and across different logical networks. It highlights the essential role of routers and gateways, the available routing protocols, and exercises on static and dynamic routing. Participants will learn how networks determine optimal paths for sending data packets, focusing on goals like shortest hops and fastest links. Emphasizing static and dynamic routing practices, including OSPF basics, this session is vital for anyone looking to enhance their networking knowledge.

london
Télécharger la présentation

Understanding Communication in Logical Networks: Routers and Routing Protocols

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Technical Refresher Session 3

  2. Overview • Difference between communication between devices on a single logical network and communication between different logical networks. • Role of a router/gateway in such a set of logical networks. • Available protocols • Exercises: • Static routes • Using OSPF

  3. Routing basics • Routing: How networks discover what paths they can use to send data packets. • Best route goals can include: • Shortest hops • Fastest links • Route around network failure

  4. The role of the router • Sits at connection point between networks. • Primary functions: • Send information to correct destination • Send information ONLY to correct destination and nowhere else (save network resources)

  5. Within a logical network • Machines are physically connected via switches or hubs • Each device has a Layer 2 MAC address -- associated with Layer 3 IP address using Address Resolution Protocol • Network address and mask define boundaries of logical network

  6. Between logical networks • All traffic routed via default gateway • Rules that determine where gateway sends packet = routes • A route is a tuple specifying: • Destination network (address/mask pair) • Gateway (IP address)

  7. Exercise 1: Static Routes • Simulate a single ISP using static routes throughout its network

  8. Dynamic Routing • Static routing doesn’t scale beyond a couple of devices – 36 routes in this network! • If edge routers can exchange information: only 9 routes needed. • So, networks need a way to distribute routes between routers: OSPF and iBGP!

  9. Exercise 2: Dynamic Routing • Dynamic routing using OSPF • See detailed notes in handout

More Related