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8/6/2019 class 13 - Basic Commands in Router Thursday, July 05, 2007
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Basic Commands in Router
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E ntraining to the US E R EXE C mode
User Ex ec Mode (User Mode) it a entry point toconfigure the routers.
From user e x ec mode we cannot make changesin the router
We can set password to protect the anonymous
user to get into this modeThe prompt :
Host Name>
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E ntraining to the privileged mode
In privilege Mode we can view the configuration
Copy the configurations
Set few configurations
The prompt :
Host name >enableHost name#
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E ntraining to the Global Configurationmode
In Global Configuration Mode we can make globalchanges in the router configuration
In it also called as Power Mode because the commandwe apply will affect the entire router configuration
The prompt :
Host Name>enable
Host Name#configure terminal
Host Name(config)#
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E ntraining to the interface mode
Interface mode helps us to configure an interfacein the ROUT E R
The prompt :Host Name >enable
Host Name#configure terminal
Host Name(config)#interface e0
Host Name(config-if)#
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Command to set the time and date
Host Name #clock set hh:min:sec dd mmyyyy
Host Name #clock set 20:56:12 25 09 2004
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Command to check the time and date set
Host Name # show clock
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Command to display recently typedcommands
Host Name # show history
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Command to set the history size
Host Name # terminal history size
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Command to view the configuration of
the router Host Name # show version
Aita# show versionCisco Internetwork Operating System SoftwareIOS (tm) 2500 Software (C2500-JS-L), Version 12.0(3), RELEASE SOFTWARE (fc1)Copyright (c) 1986-1999 by cisco Systems, Inc.Compiled Mon 08-Feb-99 18:18 by phanguyeImage text-base: 0x03050C84, data-base: 0x00001000
ROM: System Bootstrap, Version 11.0(10c), SOFTWAREBOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0 router up tme is 20 minutes
System restarted by reloadSystem image file is "flash:c2500-js-l_120-3.bin"
Configuration register is 0x2102
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Command to set a privilege password
Host Name (config)#enable password
Host Name>enable
Host Name #config terminalHost Name (config)# enable password cisco
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Command to set a encrypted privilege password
Host Name (config)#enable secret
Host Name >enableHost Name #config terminalHost Name (config)# enable secret cisco
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Command to set a user-mode password
Host Name (config)#line console 0
Host Name (config-line)#login
Host Name (config-line)#password
Host Name (config)# line console 0Host Name (config-line)# loginHost Name (config-line)# password aita
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Command to manually encrypt the password
Host Name (config)#service password-encryption
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Command to disable the manually encrypt the password
Host Name (config)# no service password-encryption
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Command to set Banner
Host Name (config)#banner motd #message #
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Configuring an InterfaceConfiguring an Interface
RouterA(config)# interface type port-number
RouterA(config-if)#
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Command to set clock rate for a interface
Host Name (config)#interface e0
Host Name (config-if)#clock rate
RouterA(config-if)# clock rate 64000RouterA(config-if)#
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Command to set Band width to an interface
Host Name (config)#interface e0
Host Name (config-if)#bandwidth
RouterA(config-if)# bandwidth 64
RouterA(config-if)# exitRouterA(config)# exitRouterA#
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Command to set hostname to a router
Host Name (config)#hostname
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Command to display the running-configuration
Host Name #show running-configuration
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Command to display the startup-configuration
Host Name #show running-configuration
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Command to copy the configuration from running-configuration to startup-configuration
Host Name #copy running-config startup-config
Host Name >enableHost Name #copy running-config startup-configDestination filename [startup-config]?Building configuration
Host Name #
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Command to assign a ip address to an interface
Host Name #config terminal
Host Name (config)#interface e0
Host Name (config-if)#ip address
Host Name (config-if)#no shutdown
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Command to display the information about an interface
Host Name #show interface e0Router# show interface serial 0Serial0 is up, line protocol is up
Hardware is HD64570Internet address is 10.140.4.2/24
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255Encapsulation HDLC, loopback not set, keepalive set (10 sec)Last input 00:00:09, output 00:00:04, output hang neverLast clearing of "show interface" counters neverInput queue: 0/75/0 (size/max/drops); Total output drops: 0Queueing strategy: weighted fairOutput queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec
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Command to display the information about all the
Host Name #show interface
Router# show interfaceEthernet0 is up, line protocol is up
Hardware is Lance, address is 00e0.1e5d.ae2f (bia 00e0.1e5d.ae2f)Internet address is 10.1.1.11/24MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255Encapsulation ARPA, loopback not set, keepalive set (10 sec)ARP type: ARPA, ARP Timeout 04:00:00Last input 00:00:07, output 00:00:08, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec
81833 packets input, 27556491 bytes, 0 no bufferReceived 42308 broadcasts, 0 runts, 0 giants, 0 throttles1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored, 0 abort0 input packets with dribble condition detected55794 packets output, 3929696 bytes, 0 underruns0 output errors, 0 collisions, 1 interface resets0 babbles, 0 late collision, 4 deferred0 lost carrier, 0 no carrier0 output buffer failures, 0 output buffers swapped out
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show flash Command
Host Name #show flash
System flash directory:File Length Name/status
1 10084696 c2500-js-l_120-3.bin
[10084760 bytes used, 6692456 available, 16777216 total]16384K bytes of processor board System flash (Read ONLY)
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Configuration Register ValuesConfiguration Register Values
Configuration Register Boot Field Value
0x2100
0x2102 to 0x210F
0x2101
Meaning
Use ROM monitor mode(Manually boot using the bcommand)
Examine NVRAM for boot systemcommands (0x2 default if router hasFlash)
Automatically boot from ROM (Provides IOS subset)
RouterA#configure terminal
RouterA(config)# config-register 0x2102
RouterA#reload
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RouterA(config)# line vty 0 4RouterA(config-line)# loginRouterA(config-line)# password aita
Command to configure Virtual
Terminal Password
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Router# show interfaces serial 1
Serial1 is up, line protocol is up
Hardware is HD64570
Description: 64Kb Line to San Jose:: :: :: :: :: :: :: :: ::
Operational..................Connection problem...Interface problem........Disabled ......................
Serial1 is up, line protocol is upSerial1 is up, line protocol is downSerial1 is down, line protocol is downSerial1 is administratively down, line protocol is down
KeepalivesCarrier Detect
Interpreting Interface Status
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(Automatic scrolling of long lines).
Move to the beginning of the command line.
Move to the end of the command line.
Move back one word.
Move forward one character.
Move back one character.
Move forward one word.
Using E nhanced E ditingCommands
Using E nhanced E ditingCommands
Delete a single character.
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Redisplays the line.
Erases a line.
Erases a word.
Returns to the EXEC MODE.
TAB Finishes typing a command.
Using E nhanced E ditingCommands
Using E nhanced E ditingCommands
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Ctrl-P or Up arrow Last (previous) command recall
Ctrl-N or Down arrow More recent command recall
Router> show history Show command buffer contents
Router> terminal history size lines Set session command buffer size
Using E nhanced E ditingCommands