1. 2016/2/211 資訊網路專題 Router & Practice

2. 2016/2/212 Router Basics Computers have four basic components: a CPU, memory, interfaces, and a bus. –A router also has these components Router can also be called a computer –However, it is a special purpose computer that is dedicated to routing

3. 2016/2/213 Router Components

4. 2016/2/214 Internal Configuration Components of a Router RAM/DRAM NVRAM -- nonvolatile RAM Flash -- erasable, re-programmable ROM ROM Interface –Include console port

5. 2016/2/215 RAM for working Storage

6. 2016/2/216 NVRAM NVRAM -- NonVolatile RAM –stores a router’s backup/startup configuration file –content remains when you power down or restart.

7. 2016/2/217 Flash Erasable, re-programmable ROM Holds the operating system image and microcode

8. 2016/2/218 ROM Contains –power-on diagnostics –a bootstrap program, and –operating system software

9. 2016/2/219 Interface Network connection through which packets enter and exit a router It can be on the motherboard or on a separate interface module Also contains console & Aux ports

10. 2016/2/2110 Router Internal Components (an example)

11. 2016/2/2111 What does Router Look Like? (Cisco 2600)

12. 2016/2/2112 What does Router Look Like? (2600)

13. 2016/2/2113 What does Router Look Like? (2600)

14. 2016/2/2114 Computer Console Connection

15. 2016/2/2115 Connecting PC to Console Port - 1

16. 2016/2/2116 Connecting PC to Console Port - 1

17. 2016/2/2117 Router Serial WAN Connectors

18. 2016/2/2118 DCE Serial Connections

19. 2016/2/2119 Modem Connection to Aux Port

20. 2016/2/2120 WAN Router Connection

21. 2016/2/2121 Router Configuration

22. 2016/2/2122 Router Startup

23. 2016/2/2123 Startup Sequence

24. 2016/2/2124 Configuring a Router You can configure a router from –a virtual (remote) terminal –a modem connection –a console terminal –a network TFTP server which allows you to maintain and store configuration information at a central site

25. 2016/2/2125 How to Access the CLI (or Router Configuration Sources)

26. 2016/2/2126 User & Privileged Modes

27. 2016/2/2127 User & Privileged Modes User mode –Typical tasks include those that check the router status. In this mode, router configuration changes are not allowed. Privileged mode –Typical tasks include those that change the router configuration.

28. 2016/2/2128

29. 2016/2/2129 A lot more commands ….

30. 2016/2/2130

31. 2016/2/2131 Show Configuration show running-config (write term, for IOS 10.3 & earlier) show startup-config (show config, for IOS 10.3 & earlier)

32. 2016/2/2132 show interface displays configurable parameters and real-time statistics related to router interfaces

33. 2016/2/2133 Router Modes

34. 2016/2/2134 Router Configuration Modes Global Interface Routing Protocol mode

35. 2016/2/2135

36. 2016/2/2136 Router Identification Configuration

37. 2016/2/2137 Password Configuration

38. 2016/2/2138

39. 2016/2/2139 Routing Protocol Configuration Router> enable Router# config t Router(config)# router igrp 100 (or router rip) Router(config-router)# network x.x.x.0 (or net x.x.x.0, for all connected networks) 10.10.10.1 / 24 10.1.1.1 / 24 Router(config-router)#network 10.1.1.0 Router(config-router)#network 10.10.10.0

40. 2016/2/2140

41. 2016/2/2141 IP address configuration Router> Router> enable Router# config t Router(config)# interface serial 0 (or int s0) Router(config-if)# ip address 10.1.1.1 255.255.255.0 Router(config-if)# no shutdown (or no shut)

42. 2016/2/2142 Basic Networking Testing

43. 2016/2/2143 telnet Can use the following commands, too

44. 2016/2/2144 If telnet fails If Telnet to one router can occur, but failure to another router occurs, it is likely that specific addressing, naming, or access permission problems caused the Telnet failure. It is possible that the problem exists on this router or on the router that failed as a Telnet target. In this case, the next step is to try ping

45. 2016/2/2145 ping

46. 2016/2/2146 Extended Ping

47. 2016/2/2147 traceroute

48. 2016/2/2148 show ip route

49. 2016/2/2149 show interface Test both physical & data link layer connection –show interface serial 0 (show int s 0) –show interface ether 0

50. 2016/2/2150 解讀 show interface