CLI Commands

7/29/2019 CLI Commands

1/7

Router Command

Commands Uses Short Cut Commands a

Command USE Short cut commnad

>enable enable privilage mode >en

# configure terminal configure terminal #conf t

#exit Exit #ex

#erase start-up configure Erase start up config #erase start up config

(config)#hostname Name Change router name (config)#hostname Name(config)#ip subnet -zero allows ip subnet (config)#ip subnet -zero

(config)# ip http server allows the use of a brower (config)# ip http server

(config)#no ip domain-lookup a misspell a command (config)#no ip domain-lookup

(config-if)#bandwidth to set a bandwidth in kilobits (config-if)#band

(config-if)#no bandwidth to restore to default bandwidth (config-if)#no band

(config)#enable secret Cisco enter encrypted password (config)#enable secret Cisco

(config)#line console 0 there are 5 line console (one widow) (config)#line console 0

(config-line)#password ##### enterconsole Password (config-line)#password #####

(config-line)# login Enable password checking (config-line)# login

(config-line)#logging synchronus Returns to a fresh line (config-line)#logging synchronus(config-line)#lexec-time out 0 0 prevent sesion from timing out (config-line)#lexec-time out 0 0

(config-line)#lexit exit console (config-line)#exit

(config)#line vty 0 4 enter Telnet( creat 5 windows) (config)#line vty 0 4

(config-line)#password ##### password for vty (config-line)#password #####

(config-line)# no enable secret gets rid of password for console and vty

(config-line)# login Enable password checking (config-line)# login

(config-line)#lexit exit Telnet (config-line)#exit

(config)#service password-encryption encrypts every password on router (config)#service password-encryption

(config)# do show run shows running config

(config)#Banner motd #Message# will appear that will first on router #Banner motd #Message#

(config)#Banner login #Message# login in banner after MOTD banner (config)#Banner login #Message#

(config)#Banner exec #Message# banner appears at privilage mode (config)#Banner exec #Message#

(config)#interface f0/0 enter configuration mode (config)#int f0/0

(config-if)#description purpose of interface (config-if)#description

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Router Command


(config-if)#ip address 0.0.0.0 255.255.255.255 ip address (config-if)#ip add 0.0.0.0 255.255.255.255

(config-if)#no shutdown turn on interface (config-if)#no shut

(config-if)#shutdown turn off interface (config-if)#shut

(config)#interface s0/0/0 enter configuration mode (config)#int s0/0/0

(config-if)#description purpose of interface (config-if)#description(config-if)#ip address 0.0.0.0 255.255.255.255 ip address (config-if)#ip address 0.0.0.0 255.255.255.255

(config-if)#clock rate 64000 clock rate must be set on DCE side (config-if)#clock rate 64000

(config-if)#no shutdown turn on interface (config-if)#no shut

(config-if)#shutdown turn off interface (config-if)#shut

(config)#int Lo0 To create a loop back address (config)#int L0

#cdp run Enable CDP on router #cdp run

#no cdp enable disable Cdp on fast Ethernet #no cdp enable

#show ip protocal shows protocols current #show ip protocol

#show ip interface brief #show ip interface brief #show ip route #how ip route

#clear ip route * clears all static routes #clear ip route *

(config)# router Rip (config)#router rip

(configure-router)#network 0.0.0.0 (config-router)#network 0.0.0.0

(configure-router)#version 2 to enable RIPv2 (config-router)#ver 2

(configure- router)#passive-interface fa0/0 get passive interface (configure- router)#passive-interface fa0/0

(configure- router)# no passive-interface fa0/0 remove passive interface (configure- router)# no passive-interface fa0/0

(configure-router)#no auto-summary disable auto summerization in protocal (configure-router)#no auto-summary

#Debug Ip rip #debug ip rip

#undebug all #undebug rip

Cisco Express forwarding

(config)# no ip cef not enable cisco express forwarding (config)# no ip cef

R1(config)# key chain Romeo R1(config)# key chain Romeo

R1(config-keychain)# key 1 R1(config-keychain)# key 1

R1(config-keychain-key)# key-string Juliet R1(config-keychain-key)# key-string Juliet

(config)# interface s0/0/0 (config)# interface s0/0/0

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Router Command


(config-if)# ip rip authentication key-chain Romeo (config-if)# ip rip authentication key-chain Romeo

(config-if)# ip rip authentication mode md5 (config-if)# ip rip authentication mode md5

Routing bahaveiors only 1 behavior per router @ 1 time

(config)#no ip classless tell routers to work only in classfulls (config)#no ip classless

config)#no ip classfull IOS 11.3 & up is the default (config)#no ip classfull(config-router)#default-information originate sends out default address (config-router)#default-information originate

(config)#router eigrp #< 1-65535># Enable EIGRP (config)#router eigrp #< 1-65535>#

(config-router)#metric weights tos k1 k2 k3 k4 k5 Tos=types of service

K1(Bandwidth)

K2(Load)

K3(Delay)

K4(Reliability)

K5(Reliabiilty)

#show ip eigrp topology show EIGRP Topology in a router #show ip eigrp topology#show ip eigrp topology all-links shows all feasible successors and links #show ip eigrp topology all-links

(config-if)#no keepalive to activate a fastethernet interface

w/out havinga node attached

(configure-router)#eigrp log-neighbor-changes converts summerization into no (configure-router)#eigrp log-neighbor-changes

summerization

(config-if)#ip summary address eigrp 1 0.0.0.0 2.2.2.2 (config-if)#ip summary address eigrp 1 0.0.0.0 2.2.2.2

(configure-router)#redistribute static inlcudes the static route in EIGRP updates (configure-router)#redistribute static

(config)#int s0/0/0 can be used to configure the percentage (config)#int s0/0/0

(config-if)#bandwidth 64 of bandwidth that may (config-if)#bandwidth 64

(config-if)#ip bandwidth-percent eigrp 1 50 be used by EIGRP on an interface (config-if)#ip bandwidth-percent eigrp 1 50

(config)#int s0/0/0 If you change the hello interval, make (config)#int s0/0/0

(config-if)#ip hello-interval eigrp 1 60 sure that you also change the hold time (config-if)#ip hello-interval eigrp 1 60

(config-if)#ip hold-time eigrp 1 180 to a value equal to or greater than the (config-if)#ip hold-time eigrp 1 180

hello interval

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Router Command


#debug eigrp fsm Turns on DUAL debugging #debug eigrp fsm

#undebug all Turns off DUAL debuging #undebug all

R1(config)#router ospf 1 to Enable OSPF R1(config)#router ospf 1

(config-router)#network 172.16.1.16 0.0.0.15 area 0 Single area OSPF w/ wildcard mask (config-router)#network 172.16.1.16 0.0.0.15 area 0(config-router)#router ID Rotuer ID comand (config-router)#router ID

(config-router)#router-id 2.2.2.2 Build rotuer ID (config-router)#router-id 2.2.2.2

#clear ip ospf process clears the id in running config with #clear ip ospf process

#show ip ospf #show ip ospf

#show ip ospf interface s0/0/0 show interface informaition #show ip ospf interface s0/0/0

(config-router)#network 172.16.1.17 0.0.0.0 area 0 if use 0.0.0.0 refer to interface subnet mask (config-router)#network 172.16.1.17 0.0.0.0 area 0

#show ip ospf neighbor verifites Neighbor Adjacencies #show ip ospf neighbor

flapping link

(config-router)#auto-cost reference-bandwidth ### Cisco ios if running @ >100Mbps use command (config-router)#auto-cost reference-bandwidth ###

(config)#int s0/0/0 (config)#int s0/0/0

(config-if)#ip ospf cost #### used non-cisco routers,no calculation need (config-if)#ip ospf cost ####

R1(config)#ip route 0.0.0.0 0.0.0.0 loopback 1 configure a default static route forwarding R1(config)#ip route 0.0.0.0 0.0.0.0 loopback 1

traffic toward ISP router

R1(config-router)#default-information origina gateway of last resort R1(config-router)#default-information origina

(config)#interface s0/0/0 hello& dead intervals on interfaces () (config)#interface s0/0/0

(config-if)#ip ospf hello-interval 10 (default n seconds hello interval, must match on all routers (config-if)#ip ospf hello-interval seconds

(config-if)#ip ospf dead-interval40 (default n seconds dead interval, must match on all routers (config-if)#ip ospf dead-intervalseconds

Dead interval must be 4x the hello interval

(config)#interface f0/0 (config)#int f0/0

(config-if)#ip ospf priority {0-255} To set a default interface proiorty (config-if)#ip ospf priority {0-255}

(config)#show ip ospf interface f0/0 to see priority on interface (config)#show ip ospf int f0/0

Sw# issue a mac-address table Sw# issue a mac-address table

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Router Command


#show inventory show inventory #show inventory

#Copy runing -config startup-config Saves the current config to NVRAM #Copy runing -config startup-config

Inter -Vlan RoutingR1(config)#interface f0/0

R1(config-if)#no ip address

R1(config-if)#no shutdown

R1(config-if)#interface f0/0.10

R1(config-subif)#encapsulation dot1q 10

R1(config-subif)#ip address 172.17.10.1 255.255.255.0

R1(config-subif)#interface f0/0.30

R1(config-subif)#encapsulation dot1q 30

R1(config-subif)#ip address 172.17.30.1 255.255.255.0

making a native vlan on a router sub-interface

interface FastEthernet0/1.99

encapsulation dot1q 999 native

PPP point-to point protocol

Configuring PPP

R1#(config)#int s0/0/0 on serial connections only

R1(config)#encapsulation hdlc default encapsulation on cisco routers

or

R1(config)#encapsulation PPP used encapsulation to non cisco routers

R1(config)#ppp quality 80 Link Quality monitoring on a %

R1(config)#no ppp quality to remove LQM

PAP

R1#(config)#username R2 password cisco username & password of other router

R1#(config)#int s0/0/0

R1#(config-if)#ppp authentication ppp

R1#(config-if)#ppp pap sent-username R1 passowrd cisco

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Router Command


R2#(config)#username R1 password cisco


R2#(config-if)#ppp authentication ppp


CHAPR1#(config)#username R2 password cisco


R1#(config-if)#ppp authentication chap


R2#(config)#username R1 password cisco


R2#(config-if)#ppp authentication chap


Multilink PPPR1#(config)#int s0/0/0

R1#(config-if)#pp multlilink

Configuring Frame Rely


R2#(config-if)#encapsulation frame-relay ?

MFR Multilink fram relay bundle interface

ietf use RFC 1490/RFC 2427 encapuslaion to non

cisco routers

R2#(config-if)#frame-relay lmi-type ? if you are using a older router before IOS 11.2

cisco

ansi

q933a

Mapping Frame relay


R2#(config-if)# frame-relay map ip 1982.168.10.1 102 ip addres dDLCI broadcast ?

cisco

ietf

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Router Command


Split Horizon issues


R2#(config-if)# no ip split-horizon

Network Security Configuration

TO get and deleft flash IOS to a router

R1#copy tftp: flash: to copy from tftp server to upgrade IOS

R1#delet flash: filename to delete a IOS from flash memory

Cisco auto secure

R1#auto secure to disable non-essential process & services,

eliminating potential security threat.

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CLI Commands

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