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routing

routing. Chapter 11 Intro to Routing & Switching. objectives. Upon completion of this chapter, you should be able to: Configure a router with a basic configuration Configure a serial WAN link with a clock rate Configure a default route Use CDP to identify neighboring Cisco devices. 11.1.

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routing

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  1. routing Chapter 11 Intro to Routing & Switching

  2. objectives • Upon completion of this chapter, you should be able to: • Configure a router with a basic configuration • Configure a serial WAN link with a clock rate • Configure a default route • Use CDP to identify neighboring Cisco devices

  3. 11.1 Basic configuration

  4. Packet tracer activity • Open up Packet Tracer& add: • A PC • 2960 switch • 1841 router w/ WIC-2T added in slot 0 • Ethernet & console cables

  5. Configure the router • Configure: • Hostname- GCC • Enable password- cisco • Secret password- class • Con 0 & vtypassword- gcit • Encrypt all passwords • Fa0/0 • Subnet 185.17.105.0 need 5 networks; use the 1st usable for this network • 1st in range for fa0/0 • 3rd in range for PC

  6. Sample configuration

  7. Add more • Add: • Another 1841 w/ WIC-2T in slot 0 • Connect with serial DCE cable from left to right • S0/0/0 to s0/0/0 • Another switch • Another PC • Connect with Ethernet and console cables

  8. Configure the router • Configure: • Hostname- GCEC • Enable password- cisco • Secret password- class • Con 0 & vtypassword- gcit • Encrypt all passwords • Fa0/0 • 2nd usable range • 1st in range for fa0/0 • 3rd in range for PC

  9. How you connect to isp • Real life serial (WAN) connection to ISP • Your router is a DTE • CSU/DSU is the DCE • Connects to ISP network • Provides a clocking rate for signal • External CSU/DSU or module for router

  10. Serial cables • DB-60 to V.35 Smart Serial

  11. Configure the clock rate • On the serial port connected to CSU/DSU • DCE

  12. Configure clock rate

  13. Review- 5q • What is the purpose of a CSU/DSU? • Connect router to ISP & provide clock rate • What kind of cable would you connect from your router to a CSU/DSU? • Smart serial to DB-60 • In our class/PT, on which type of port would you configure a clock rate on? • Serial • What is the command to configure the clock rate? • Router(config-if)# clock rate 56000 • Is your router normally a DCE or DTE? • DTE

  14. 11.2 How to route data

  15. Configure a Default Route • Router forwards packet to a destination network • Looks at routing table to see which port to go out • You can set a default route to go out if destination network is not in routing table

  16. Configure default route Default route using outgoing next hop IP Default route using outgoing INT

  17. Review- 4q • What do you configure in a router to tell it “if you don’t have the destination network in the routing table, go this way.” • Default route • What are the 2 possible commands to configure a default route? • B(config)# ip route 0.0.0.0 0.0.0.0 next hop IP • B(config)# ip route 0.0.0.0 0.0.0.0 outgoing int • What does the quad zero mean? • Any network (IP/SM) • Which command encrypts all passwords? • Service password-encryption

  18. 11.3 Cisco discovery protocol

  19. Cisco Discovery Protocol- CDP • Shares info between directly connected Cisco devices (neighbors) • Runs on boot • Sends periodic CDP advertisements, every 60 sec. • Operate at Layer 2 • Information gathered by CDP includes: • Device host name • Layer 3 addresses • What the directly connected port is, “serial 0/0/0” • Capabilities list – Router, Switch • Platform, for example Cisco 1841

  20. Show CDP Neighbors

  21. Show CDP Neighbors Detail

  22. Disabling CDP • Why disable it? • PT 5.4.4.5

  23. Other cdp commands • Show cdp interface • Verify frequency sent P2R3#show cdp interfaceFastEthernet0/0 is up, line protocol is upencapsulation ARPASending CDP packets every 60 secondsHoldtime is 180 seconds

  24. Review- Q • What layer does CDP operate at? • Layer 2 • How often do CDP advertisements get sent? • 60 seconds • What does CDP do? • Discover neighboring Cisco devices • What command displays the table of neighboring devices? • B# show cdpneigbors

  25. Review- q • What command turns CDP off for the router? • B(config)# no cdp run • Why would you turn CDP off? • Neighbors aren’t Cisco devices • Your Cisco router connects to a 3Com switch on Fa0/0 and a Cisco router on S0/0/0. What command will make the router not exchange CDP advertisements to the switch? • B(config-if)# no cdp enable

  26. Review- Q • Identify what each category in the table means.

  27. summary • You configured a router with basic settings. • You know how a router connects to an ISP with a CSU/DSU. • You can identify DCE and DTE devices. • You know which cable connects from the router to the CSU/DSU. • You can configure a clock rate on a serial interface. • You can configure a default route and know why you should configure one.

  28. summary • You know the purpose of CDP and how/when it is used. • You can read a CDP table and can backwards design the network based on the output. • You know which command is used to display the CDP table and the detailed output. • You can turn CDP off on the router and on the interface.

  29. Review & study • Complete the study guide handout • Take the quiz on netacad.com • Jeopardy review

  30. routing Chapter 11 Intro to Routing & Switching

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