Chapter 4 Internetworking Operating System ) IOS) and Security Device Manager (SDM)

1. Chapter 4Internetworking Operating System )IOS) and Security Device Manager (SDM)

2. Cisco Router Physical Components ROM POST, BootP, Mini IOS nvRAM Startup-Config File RAM Running-Config File Flash Complete IOS

3. Boot Sequence 1) POST: Power On Self Test 2) Boot Program (BootP) is loaded: a) IOS is loaded - Flash - TFTP - Mini IOS b) Configuration is loaded - nvRAM - TFTP - Setup Mode Dialog

4. Switching between User and Privileged Modes Router>enable Router# Router#disable Router> Exiting configuration Router>logout OR Router>exit OR Router#exit

5. Global Configuration Mode GCM Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)# Basic Commands Router(config)#hostname CISCO CISCO(config)# Router(config)#banner motd # This is Secure Router! # Router(config)#

6. Show Commands Router>show version (Version, no. of interfaces, IOS image name, size of RAM, NVRAM & FLASH) Router>sh flash (IOS no. & name, available & usable size of FLASH) Router#sh run (Configuration in RAM) Router#sh startup (Configuration in NVRAM, size of configuration in NVRAM) Router(config)#do show run

7. Using Pipes ( | ) Router#show run | ? append Append redirected output to URL (URLs supporting append operation only) begin Begin with the line that matches exclude Exlude lines that match include Include lines that match redirect Redirect output to URL section Filter a section of output tee Copy output to URL

8. Cisco Router Passwords 1- Enable Secret 2- Enable Password 3- Console Password 4- AUX Password 5- Telnet (VTY) Password 1- Enable Secret Router#config t Router(config)#enable secret cisco 2- Enable Password Router(config)#enable password cisco1

9. 3- Console Password Router(config)#line console 0 Router(config-line)#password cisco Router(config-line)#login Router(config-line)#logging synchronous Router(config-line)#exec-timeout 0 0 Router(config-line)#exit 4- Auxiliary Password Router(config)#line aux 0 Router(config-line)#password cisco Router(config-line)#login 5- VTY Password Router(config-line)#line vty 0 4 Router(config-line)#password telnet Router(config-line)#login

10. Cisco Router Interfaces Fixed Interfaces Modular Interfaces f0 f1 f0/0 f0/1 f0/0/0 e0 e1 e0/0 s0 s1 s0/0 s0/1 s0/0/0 Port Slot/Port Slot/SubSlot/Port Router(config)#interface interface name Router(config)#interface f0 Router(config-if)#ip address 192.168.100.1 255.255.255.0 Router(config-if)#no shut Router(config-if)#description Connection to Sales network Router(config)#interface s0 Router(config-if)#clock rate {no. of bps} Router(config-if)#bandwidth {no. of Kb}

11. Secondary IP Router(config-if)#ip address 192.168.150.1 255.255.255.0 secondary Sub Interfaces Router(config)#int f0 Router(config-if)#no ip address Router(config-if)#no shut Router(config-if)#int f0.1 Router(config-subif)#ip add 172.16.16.1 255.255.240.0 Router(config-subif)#int f0.2 Router(config-subif)#ip add 172.16.32.1 255.255.240.0

12. Saving/Deleting Configuration Router#copy run start Router#copy start run Router#erase startup Router#reload

13. Viewing Additional Information Router#sh history Router#sh terminal Router#terminal history size {1-255} Router#sh controllers interface name Router#sh controllers s0/0/1 Router#sh interface interface name Router#sh interface f1 Router#sh ip interface interface name Router#sh ip interface s0/0 Router#clear counters interface name Router#sh ip interface brief Interface Status Physical Layer D.L Layer (Line Protocol) up up administratively down down down down up down

14. Securing Passwords Router(config)#service password-encryption ex: Router#config t Router(config)#service password-encryption Router(config)#exit Router#sh run Router#sh startup Router#copy run start Router#config t Router(config)#no service password-encryption Router(config)#exit Router#copy run start Router#sh run

15. Configuring Cisco Router through Internet Explorer Router(config)#ip http server Setting Time and Date Router#clock set 00:00:00 19 feb 2008