Cisco Router Configuration Commands

RequirementCisco Command
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 RIP Router(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 hopsRouter(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


 

Cisco Router Show Commands

RequirementCisco Command
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 router show 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


 

Cisco Router Basic Operations

RequirementCisco Command
EnableEnter privileged mode
Return to user mode from privilegeddisable
Exit RouterLogout or exit or quit
Recall last commandup arrow or
Recall next commanddown arrow or
Suspend or abort and  and 6 then x
Refresh screen output
Compleat CommandTAB


 

Cisco Router Copy Commands

RequirementCisco Command
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


 

Cisco Router Debug Commands

RequirementCisco Command
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 all

undebug all

Ref : http://broadband.ce.ncu.edu.tw/~rene/Network/Router/BasicCommand.htm
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