Cisco router command configuration overview

Cisco router: command configuration overview
[Abstract] Cisco router configuration statement summary startup interface, assigning IP
address:
router>router>enablerouter#router#configureterminalrouter (config) #router (config)#interf
acetypeportrouter (config-if) #noshutdownrouter (config-if) # ipaddressip-addresssubnetmaskrouter (config-if) rip routing protocol # ^ Z configuration: 30 seconds to update
a router(config) #routerriprouter (config-if) #......

Cisco router: commond configuration overview:
Start the interface, IP address allocation:
Router>
Router> enable
Router#
Router# configure terminal
Router (config) #
Router (config) interface type port #
Router (config-if no shutdown) #
Router (config-if) IP address IP-address subnet-mask #
Router (config-if) # ^ Z

Configure the rip routing protocol: 30 seconds to update once
Router (config router RIP) #
Router (config-if network network-number) # < -- notice the standard a, B, C network -- >

Configure the IGRP routing protocol: 90 seconds to update once
Router (config) router IGRP as-number # < -- as-number range of 1 to 65535 -- >
Router (config-if network network-number) # < -- notice the standard a, B, C network -- >

Configure the Novell IPX routing protocol: Novell rip 60 second to update once
Router (config) IPX routing [node address] #
Router (config) IPX maximum-paths paths # < -- set the load balance, the range of 1 to
512 -- >
1

Router (config-if) IPX network network-number [encapsulation encapsulation-type] [secon
dary] #< -- notice the standard a, B, C network -- >

The configuration of ddr:
Router (config) dialer-list group-number protocol protocol-type permit [list # acl-number]
Router (config) Interface BRI 0 #
Router (config-if dialer-group group-number) #
Router (config-if) dialer map protocol-type next-hop-address name hostname # telphonenumber

The configuration of isdn:
Router (config) isdnth-typeth-type < -- # configuration ISDN switch type, Chinese using
basic-net3 -- >

Configure frame relay:
Router (config-if) encapsulation frame-relay [cisco IETF # |]
Router (config-if) frame-relay lmi-type [ansi Cisco # | | q933a]
Router (config-if bandwidth kilobits) #
Router (config-if) # frame-relay invers-arp [protocol] [dlci]
< -- Static invers ARP table:
Router (config) frame-relay protocol protocol-address DLCI # [broadcast] [Cisco] [payload
-compress IETF | | packet-by-packet]
-- >
< -- set the keepalive interval:
Router (config-if keepalive number) #
-- >
< -- the local interface with the specified dlci:
Router (config-if) frame-lelay local-dlci number #
-- >
< -- sub interface:
Router (config-if) interface type port.subininterface-number multipoint | # [point-to-point]
Router (config-subif) IP unnumbered interface #
2

Router (config-subif) frame-lelay local-dlci number #
-- >

Configuration the standard acl:
Router (config) access-list access-list-number permit | # [Deny] source [source-mask] < -access-list-number range: 1 to 99 standard ACL; 100 ~ 199 extended ACL; 800 to 899
standard IPX ACL; 900 ~ 999 expansion of IPX ACL; 1000~1099 IPX SAP ACL; 600 ~
699apple talk ACL -->
Router (config-if) IP access-group access-list-number in | # [out]

Configure an extended acl:
Router (config) access-list access-list-number permit | # [Deny] [protocol protocolnumber]source source-wildcard | [source-port] destination destination-wildcard [destinatio
n-port][established]
Router (config-if) IP access-group access-list-number in | # [out]

Configuration the naming acl:
Router (config) IP access-list standard | # [extended] acl-name
Router (config [std- NaCl ext-] |) | # [permit deny] [ip-access-list-test-conditions]
Router (config [std- NaCl ext-] |) # no [permit deny] [ip-access-list-test-conditions] |
Router (config [std- NaCl ext-] |) # ^ Z
Router (config-if) IP access-group [acl-name 1~199 # | |] [in out]
Configure the DCE clock:
Router# show controllers type port < -- define DCE interface -- >
Router (confin-if) clock rate 64000 # < -- into the DCE interface to set the clock rate -- >

Configure the PPP protocol:
3

Router (config) username name password set-password-here # < -- Verification establish
database -- >
Router (config-if encapsulation PPP) # -- start -- > < PPP protocol
Router (config-if PPP outhentication) # [chap chap PAP PAP chap | | | PAP] < -- choose
PPPauthentication -- >
Router (config-if) PPP Pap sent-username name password password # < -- send
verificationinformation -- >

PAP authentication configuration example:
The verifier:
Router-server (config) username client password
12345 # < -- Verification establish database -->
Router-server (config) interface serial 0 #
Router-server (config-if encapsulation PPP) #
Router-server (config-if) PPP authentication Pap # < -- choose to use PAP to achieve
PPP certification -- >
Router-server (config-if) # ^ Z

Attested party:
Router-client (config-if encapsulation PPP) #
Router-client (config-if) PPP Pap sent-username client password 12345 # < -- send
verificationinformation -- >
Router-client (config-if) # ^ Z

PAP bidirectional authentication configuration example:
Router a:
Routera (config) username B password 12345 #
Routera (config) interface serial 0 #
Routera (config-if encapsulation PPP) #
Routera (config-if) PPP authentication Pap #
Routera (config-if) PPP Pap sent-username a password 54321 #
Routera (config-if) # ^ Z
Router b:
Routerb (config) username a password 54321 #
4

Routerb (config) interface serial 1 #
Routerb (config-if encapsulation PPP) #
Routerb (config-if) PPP authentication Pap #
Routerb (config-if) PPP Pap sent-username B password 12345 #
Routerb (config-if) # ^ Z

Chap authentication configuration example:
The verifier:
Router-server (config) username router-client password 12345 #
Router-server (config) interface serial 0 #
Router-server (config-if encapsulation PPP) #
Router-server (config-if) PPP authentication chap #
Router-server (config-if) # ^ Z
Attested party:
Router-client (config-if encapsulation PPP) #
Router-client (config-if) PPP authentication chap #
Router-client (config-if) PPP chap hostname router-client #
Router-client (config-if) PPP chap password 12345 #
Router-client (config-if) # ^ Z chap bidirectional authentication configuration example:
Router a:
Routera (config) username routerb password 12345 #
Routera (config) interface serial 0 #
Routera (config-if encapsulation PPP) #
Routera (config-if) PPP authentication chap #
Routera (config-if) PPP chap hostname routera #
Routera (config-if) PPP chap password 54321 #
Routera (config-if) # ^ Z
Router b:
Routerb (config) username routera password 54321 #
Routerb (config) interface serial 1 #
Routerb (config-if encapsulation PPP) #
Routerb (config-if) PPP authentication chap #
Routerb (config-if) PPP chap hostname routerb #
Routerb (config-if) PPP chap password 12345 #
5

Routerb (config-if) # ^ Z

Telnet use:
Routera# terminal monitor < -- can back to execute the debug command on a remote
hostresults -- >
Routera# telnet IP-address [router-name] < -- the host telnet to the specified address
or name -->
Routerb# [exit logout] < -- | exit telnet -- >
Routerb# ++<6> then press < -- hang telnet -- >
Routera# show sessions < -- shows all current telnet information, including connectnumber -- >
Routera# connect-number < -- returns the specified telnet connection -- >
Connection -- > routera# disconnect IP-address [router-name] < -- disconnect the
specified address or name of the host
Routera# show user < -- show the telnet connection to the information -- > this machine
Routera# clear line [0 | 1 | 2 | 3 | 4] < -- disconnect connection to
the specified telnet -- > thismachine
No telnet to the machine:
Router (config) line vty 04 #
Router (config-line access-class acl-number) #
Router (config) # ^ Z
Set the host name:
Router (config hostname set-hostname) #

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
6

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 -- >

For all the password encryption:
Router (config) service password-ancryption set-password-here #
Router (config) no service password-ancryption # < -- cancel encryption -- >

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) #

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 -- >
7

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 tracke:
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 -->

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 #

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 #
8

Router (config config-register 0x2102) #
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..

The definition of the DNS host:
Router (config) IP name-server server-address # [server-address 2..

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 #

Static router configuration:
Router (config) IP route IP-address subnet-mask # [next-hop-address [distace local-outport]] |
< -- distance range: 1 ~ 255, equivalent to the priority, the smaller the
better. Rip=120;dspf=110; igrp=100; eigrp=90 -- >

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 -- >

Other commands:
Router# show version
9

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
10

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

More related:
How To Recover Cisco Router Password
The Difference of The Cisco Catalyst 2900 and Cisco Catalyst 1900
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Cisco router command configuration overview

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Cisco router command configuration overview