Cisco router: commond configuration overview (3)

Published on February 14 2014 by Emma lee

Set the host name:

Router (config hostname set-hostname) #

Router (config) # ^ Z

Set user mode code:

Router (config) line console 0 #

Router (config-line) # login

Router (config-line password set-password) #

Router (config-line) # ^ Z

Set the telnet password:

Router (config) line vty 04 #

Router (config-line) # login

Router (config-line password set-password) #

Router (config-line) # ^ Z

Set the privileged mode password:

Router (config) enable password set-password # < -- the password is not encrypted, password -- >

Router (config) enable secret set-password # < -- the encrypted password -- >

Router (config) # ^ Z

For all the password encryption:

Router (config) service password-ancryption set-password-here #

Router (config) no service password-ancryption # < -- cancel encryption -- >

Router (config) # ^ Z

Set the login banner:

Router (config banner MOTD) # separator set-banner-information-here delimiters < -- before and after the delimiter must agree -- >

Set interface description information:

Router (config-if description set-port-information-here) #

Router (config) # ^ Z

The control of cdp:

Router (config-if CDP enable) # < -- in the designated port enable CDP, default -- >

Router (config-if) no CDP enable # < -- close CDP -- > in the designated port

Router (config CDP run) # < -- that all ports enable CDP -- >

Router (config) no CDP run # < -- that all ports closed CDP -- >

The use of ping:

Router# Ping IP-address

Router# Ping < -- extended ping command -- >

Protocol [ip]:[protocol-type] < -- select the protocol type -- >

Target IP address:ip-address < -- input test address -- >

Repeat count [5]: < -- choose to send ICMP packet number -- >

Datagram size [100]: < -- choose the size of each package -- >

Timeout in seconds [2]: < -- set each packet timeout -- >

Extended commands [n]:y < -- using the extended ping command -- >

Sweep range of sizes [n]:

The use of tra>Router# trace IP-address [host-name]

Cisco 4000 router specified media type:

Router (config-if media-type 10baset) # < -- the AUI (the default) failure, modified to use RJ-45 -->

Router (config-if) # ^ Z

Change the startup sequence of routers:

Router (config) boot system flash ios-filename #

Router (config) boot system TFTP ios-filename tftp-ip-address #

Router (config) boot system ROM #

Router (config) # ^ Z

Modify register values:

Router (config config-register value) # < -- Cisco default value = 0x2102, value range: 0x2100(enter ROM monitor), 0x2101 (the system boot from ROM to 0x210f (0x2102), enables the system to boot from NVRAM). 0x1 = 0x2101, starting from the smallest bit change -- >

Change the register values in the ROM monitor:

> o/r value

Router password recovery:

Cold shutdown, then start again and in 60 seconds press ctrl>+ to enter the ROM monitor mode

> o/r 0x2142 > > confreg <--25xx router or 0x2142 <--16xx router

Router> I

Router> n

Router> enable

Router# copy startup-config running-config

Router# configure terminal

Router (config) enable secret new-password #

Router (config config-register 0x2102) #

Router (config) # ^ Z

Router# copy running-config startup-config

Router# reload

Configuration name - main entrance:

Router (config) # IP host set-name [tcp-port-number] IP-address [IP-address 2..

Router (config) # ^ Z

The definition of the DNS host:

Router (config) IP name-server server-address # [server-address 2..

Router (config) # ^ Z

Disable dns:

Router (config) no IP domain-lookup #

Router (config) # ^ Z configuration level segmentation:

Router (config-if IP split-horizon) #

Router (config-if) no IP split-horizon #

Router (config-if) # ^ Z

Static router configuration:

Router (config) IP route IP-address subnet-mask # [next-hop-address [distace local-out-port]] |

< -- distance range: 1 ~ 255, equivalent to the priority, the smaller the better. Rip=120;dspf=110; igrp=100; eigrp=90 -- >

Router (config) # ^ Z

Configure a default router:

Router (config) IP defoult-network IP-address # < -- Dynamic default route -- >

Router (config) IP route 0.0.0.0 0.0.0.0 # [next-hop-address local-out-port [distace]] | < -- Staticdefault route -- >

Router (config) # ^ Z

Other commands:

Router# show version

Router# show running-config

Router# show startup-config

Router# show flash

Router# show interface [type port]

Router# show buffers

Router# show protocol

Router# show mem

Router# show stacks

Router# show processes

Router# show CDP entry [device-name] < -- display the specified neighbor three layers of information -- >

Router# show cdp neighbors

Router# show cdp neighbors detail < -- shows all the neighbors three layers of information - >

Router# show IP router

Router# show IPX router

Router# show host

Router# show ip protocol

Router# show IP interface type port

Router# show IPX interface type port

Router# show IPX servers

Router# show IPX traffic

Router# show access-lists [acl-number]

Router# show ISDN status

Router# show dialer < -- Viewing the ISDN dial information -- >

Router# show ISDN active

Router# show frame-relay PVC

Router# show frame-relay map

Router# show frame-relay LMI

Router# erase startup-config

Router# reload

Router# setup

Router# copy running-config startup-config

Router# copy startup-config running-config

Router# copy TFTP running-config

Router# copy running-config TFTP

Router# debug IPX routing activity

Router# debug IPX SAP

Router# debug ISDN q921

Router# debug ISDN Q931

Router# debug dialer

Router# debug IP rip

Router# clear interface bri

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