Comandi di configurazione di Switch e Router Cisco

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Cisco IOS è un sistema operativo per dispositivi di rete router e switch della società Cisco Systems, installato attualmente su tutti gli switch e sulla maggior parte dei router della stessa ditta, che costituiscono circa l’80% degli switch della rete mondiale.

Si tratta di un sistema molto semplice senza interfaccia grafica bensi’ a riga di comando. A seconda dei diritti di lettura, scrittura ed esecuzione dell’operatore e della modalità con cui egli ha avuto accesso, il sistema mette a disposizione una serie di comandi predefiniti.

La seguente tabella mostra i principali comandi per la configurazione:

Operazioni di Base
FUNZIONECOMANDO
EnableEnter privileged mode
Return to user mode from privilegeddisable
Exit RouterLogout or exit or quit
Recall last commandup arrow or <Ctrl-P>
Recall next commanddown arrow or <Ctrl-N>
Suspend or abort<Shift> and  <Ctrl> and 6 then x
Refresh screen output<Ctrl-R>
Compleat CommandTAB
Comandi di Configurazione
FUNZIONECOMANDO
Set a console password to ciscoRouter(config)#line con 0
Router(config-line)#login
Router(config-line)#password cisco
Set a telnet passwordRouter(config)#line vty 0 4
Router(config-line)#login
Router(config-line)#password cisco
Stop console timing outRouter(config)#line con 0
Router(config-line)#exec-timeout 0 0
Set the enable password to ciscoRouter(config)#enable password cisco
Set the enable secret password to peter.This password overrides the enable password and is
encypted within the config file
Router(config)#enable secret peter
Enable an interfaceRouter(config-if)#no shutdown
To disable an interfaceRouter(config-if)#shutdown
Set the clock rate for a router with a DCE cable to 64KRouter(config-if)clock rate 64000
Set a logical bandwidth assignment of 64K to the serial interfaceRouter(config-if)bandwidth 64
Note that the zeroes are not missing
To add an IP address to a interfaceRouter(config-if)#ip addr 10.1.1.1 255.255.255.0
To enable RIP on all 172.16.x.y interfacesRouter(config)#router rip
Router(config-router)#network 172.16.0.0
Disable RIPRouter(config)#no router rip
To enable IRGP with a AS of 200, to all interfacesRouter(config)#router igrp 200
Router(config-router)#network 172.16.0.0
Disable IGRPRouter(config)#no router igrp 200
Static route the remote network is 172.16.1.0, with a mask of
255.255.255.0, the next hop is 172.16.2.1, at a cost of 5 hops
Router(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1 5
Disable CDP for the whole routerRouter(config)#no cdp run
Enable CDP for he whole routerRouter(config)#cdp run
Disable CDP on an interfaceRouter(config-if)#no cdp enable
   Comandi di Show
FUNZIONECOMANDO
View version informationshow version
View current configuration (DRAM)show running-config
View startup configuration (NVRAM)show startup-config
Show IOS file and flash spaceshow flash
Shows all logs that the router has in its memoryshow log
View the interface status of interface e0show interface e0
Overview all interfaces on the routershow ip interfaces brief
View type of serial cable on s0show controllers 0
(note the space between the ‘s’ and the ‘0’)
Display a summary of connected cdp devicesshow cdp neighbor
Display detailed information on all devicesshow cdp entry *
Display current routing protocolsshow ip protocols
Display IP routing tableshow ip route
Display access lists, this includes the number of displayed matchesshow access-lists
Check the router can see the ISDN switchshow isdn status
Check a Frame Relay PVC connectionsshow frame-relay pvc
show lmi traffic statsshow frame-relay lmi
Display the frame inverse ARP tableshow frame-relay map
Comandi di copia
FUNZIONECOMANDO
Save the current configuration from DRAM to NVRAMcopy running-config startup-config
Merge NVRAM configuration to DRAMcopy startup-config running-config
Copy DRAM configuration to a TFTP servercopy runing-config tftp
Merge TFTP configuration with current router configuration held in DRAMcopy tftp runing-config
Backup the IOS onto a TFTP servercopy flash tftp
Upgrade the router IOS from a TFTP servercopy tftp flash
   Comandi di debug
FUNZIONECOMANDO
Enable debug for RIPdebug ip rip
Enable summary IGRP debug informationdebug ip igrp events
Enable detailed IGRP debug informationdebug ip igrp transactions
Debug IPX RIPdebug ipx routing activity
Debug IPX SAPdebug IPX SAP
Enable debug for CHAP or PAPdebug ppp authentication
Switch all debugging offno debug allundebug all
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