Cisco IOSCisco IOS Cisco, William Yeager 1986 Cisco Cisco Catalyst , Catalyst 2950 / 2960 3550 / 3560 Cisco IOS , ,

Cisco IOSCLIconsole portAux porttelnet -- in-band IOS EXEC sessionSDM

Cisco 250026002800 ISR, , SDM -- 2800, , 1800800 12.4 IOS SDM2800,

ISR Cisco Cisco , power-on self-test, POST, flash memory Cisco IOS IOS startup-config NVRAMreloadIOSRAM

ISR Cisco ()IOSIOS NVRAM startup-config RAM, running-config

ISR (2600) ISR ISR IOS NVRAM ISR ISR NVRAM , TFTP , setup mode, , , , setup , CLI SDM

Setup mode

ISR CLI Enter , , ,

ISR CLI, Enter , Router> , exec () , exec () Cisco , enable

Router# disable

logout

Global modeconfigure DRAM DRAMTFTP RAM

CLIline(config-line)#

, , Enter, Q ,

, , ,

, , , cr

, , show interface serial 0/0, ru2$

Cisco IOS ROM ( POST )Cisco IOS IOS

POSTNVRAMFlashDRAM

, ,

telnet (message of the day, MOTD) , telnetExec EXEC (incoming) (login) , MOTD , , , no banner login

MOTD

telnet (VTY) telnet enable enable secret enable ,

enable

last-resort TACACS , TACACS , TACACS , password 10.3 enable , enable secret , secret , , enable Use-tacacs TACACS

, , login no login , aux , , console vty telnet , , telnet

login , , , , login ,

EXEC (timeout) 0, , , ,

telnet Cisco IOS , 5 VTY 0 4, SFRouter VTY (telent) no login , telnet

SSH1. 2. ()3. 4. SSH 5. SSH 6. vty 7. SSH Telnet SSH

enable secret , enable ,

show running-config show interface

do IOS 12.3 , Cisco IOS , 12.3 , ,

12.4 IOS

Cisco 2522 Interface

2600 interface / ISR 2600interface / interface / /

IP IP

()

( EIGRP OSPF)

DRAM NVRAM

NVRAM

, NVRAM Ctrl + C CLI

show interface

show interfaceOKOKkeepalivekeepalive)keepaliveno shutdown

show interface

show ip interface IP

show ip interface brief keepalive

show protocols 1 2 , IP

show controllers ,

show controllers R1 R2 R1clockR1

show controllers keepalives R1

Cisco (SDM)SDMHTTPHTTPS Cisco 830 7301 SDM, 85087018002800 3800 SDM IPSec VPNSDM www.cisco.com/go/sdm SDM, www.cisco.com/pcgi-bin/tablebuild.pl/sdmISRSDMwww.cisco.com/pcgi-bin/tablebuild.pl/sdmtool-demodemo

SDM LAN ,

, , http://1.1.1.1,

HTTPSSDMHTTP/HTTPS 15 ()

HTTPSSDMSSH Telnet,

HTTPSSDM https://1.1.1.1 ,

HTTPSSDM / SDM ,

HTTPSSDM, Yes

HTTPSSDM,

HTTPSSDM SDM , ,

HTTPSSDM SDM

SDM Configure , , Create New Connection , LAN WAN

SDM Edit Interface / Connection ,

SDM ( LAN WAN , )

SDM, Additional Tasks , Router Properties

SDMMOTD enable secret , DHCP , DHCP pool Add DHCP pool