Chapter 10

Deploying a Router

In This Chapter

  • Understanding how routers work
  • The differences among routing, bridging, and switching
  • Finding the Next Hop for a packet
  • Running the RIPv2 routing protocol
  • Running the standard OSPF routing protocol
  • Running the standard IS-IS routing protocol

The previous five chapters show how to install a device, set it up with the CLI or J-Web, and manage, monitor, and secure it. In the next three chapters, we show you how to turn your Junos OS device loose and see what it can do.

This chapter helps you understand routers. We discuss how packets make their way through a network hop-by-hop, and why this should guarantee the “best” route to a destination. Then we consider how a router chooses the correct next hop. We also look at the configuration basics of three routing protocols: RIPv2, OSPF, and IS-IS.

Note: This chapter explores the definitions for network devices like routers, bridges, and switches. We don't talk about hubs or repeaters to any extent. That's a little like talking about steam engines when considering modern railroads — nice to know about, but you won't see many.

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