Static Routing

Objectives

• Define the general role a router plays in networks.
• Describe the directly connected networks, different router interfaces.
• Examine directly connected networks in the routing table and use the CDP protocol.
• Describe static routes with exit interfaces.
• Describe summary and default route.
• Examine how packets get forwarded when using static routes.
• Identify how to manage and troubleshoot static routes.

   Functions of a Router
– Best Path Selections
– Forwarding packets to destination
   Introducing the Topology
–  3 1800 series routers connected via WAN links
–  Each router connected to a LAN represented by a switch and a PC

  Connections of a Router for WAN

– A router has a DB-60 port that can support 5 different cabling
standards
  Connections of a Router for Ethernet
– 2 types of connectors can be used: Straight through and Cross-over
•  Straight through used to connect:

– Switch-to-Router, Switch-to-PC, Router-to-Server, Hub-to-PC, Hub-to-Server

•  Cross-over used to connect:

– Switch-to-Switch, PC-to-PC, Switch-to-Hub, Hub-to- Hub, Router-to-Router

Examining Router Interfaces
– Show IP router command – used to view routing table
– Show Interfaces command – used to show status of an interface
– Show IP Interface brief command – used to show a portion of the interface information
– Show running-config command – used to show configuration file in RAM

Configuring an Ethernet interface
– By default all serial and Ethernet interfaces are down
– To enable an interface use the No Shutdown command

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