Learn About Router

Requirement Cisco Command

Set a console password to cisco
Router(config)#line con 0
Router(config-line)#login
Router(config-line)#password cisco

Set a telnet password
Router(config)#line vty 0 4
Router(config-line)#login
Router(config-line)#password cisco

Stop console timing out
Router(config)#line con 0
Router(config-line)#exec-timeout 0 0

Set the enable password to cisco
Router(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 interface
Router(config-if)#no shutdown

To disable an interface
Router(config-if)#shutdown


Set the clock rate for a router with a DCE cable to 64K
Router(config-if)clock rate 64000


Set a logical bandwidth assignment of 64K to the serial interface
Router(config-if)bandwidth 64

Note that the zeroes are not missing

To add an IP address to a interface
Router(config-if)#ip addr 10.1.1.1 255.255.255.0


To enable RIP on all 172.16.x.y interfaces
Router(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 interfaces
Router(config)#router igrp 200
Router(config-router)#network 172.16.0.0

Disable IGRP
Router(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 router
Router(config)#no cdp run

Enable CDP for he whole router

Router(config)#cdp run

Disable CDP on an interface


Router(config-if)#no cdp enable


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Cisco Router Show Commands

Requirement Cisco Command

View version information
Show version

View current configuration (DRAM)
show running-config

View startup configuration (NVRAM)
Show startup-config

Show IOS file and flash space
Show flash

Shows all logs that the router has in its memory

show log

View the interface status of interface e0

show interface e0

Overview all interfaces on the router

show ip interfaces brief

View type of serial cable on s0

show controllers 0 (note the space between the ’s’ and the ‘0′)

Display a summary of connected cdp devices

show cdp neighbor

Display detailed information on all devices

show cdp entry *

Display current routing protocols

show ip protocols

Display IP routing table

show ip route

Display access lists, this includes the number of displayed matches

show access-lists


Check the router can see the ISDN switch

show isdn status

Check a Frame Relay PVC connections
show frame-relay pvc

Display the frame inverse ARP table

show frame-relay map




Cisco Router Basic Operations

Requirement Cisco Command




Enable
Enter privileged mode

Return to user mode from privileged
disable


Exit Router
Logout or exit or quit


Recall last command
up arrow or <Ctrl-P>

Recall next command
down arrow or <Ctrl-N>


Suspend or abort
<Shift> and <Ctrl> and 6 then x


Refresh screen output
<Ctrl-R>


Compleat Command
TAB

Cisco Router Copy Commands
Requirement
Cisco Command



Save the current configuration from DRAM to NVRAM
copy running-config startup-config



Merge NVRAM configuration to DRAM
copy startup-config running-config
Copy DRAM configuration to a TFTP server
copy runing-config tftp



Merge TFTP configuration with current router configuration held in DRAM
copy tftp runing-config

Backup the IOS onto a TFTP server
copy flash tftp

Upgrade the router IOS from a TFTP server
copy tftp flash


Cisco Router Debug Commands

requirement Cisco Command


Enable debug for RIP
debug ip rip

Enable summary IGRP debug information
debug ip igrp events

Enable detailed IGRP debug information
debug ip igrp transactions

Debug IPX RIP
debug ipx routing activity

Debug IPX SAP
debug IPX SAP

Enable debug for CHAP or PAP
debug ppp authentication

Switch all debugging off
no debug all
undebug all