Basic Router Configuration

In basic configuration of router we will learn, how can we apply basic commands on router.
Here are the commands of basic configuration.
The router modes:-

  • Router> User mode
  • Router# Privileged mode
  • Router(config)# Global configuration mode
  • Router(config-if)# Interface mode
  • Router(config-subif)# Subinterface mode
  • Router(config-line)# Line mode
  • Router(config-router)# Router configuration mode


BASIC EXAMPLES OF ROUTER CONFIGURATION WITH DIAGRAM

For Basic Router Configuration no need to see table below watch

  only the examples and you will able to learn how to configure.




Watch The Scenario Below..

Basic Configuration Commands Of Above Scenarios are:-

      For both Lab-A and Lab-B only change the ip

 


Switch On The Router then......


Self decompressing the image :###############################################[OK]

Restricted Rights Legend
Use, duplication, or disclosure by the Government issubject to restrictions as set forth in subparagraph(c) of the Commercial Computer Software - RestrictedRights clause at FAR sec. 52.227-19 and subparagraph(c) (1) (ii) of the Rights in Technical Data and ComputerSoftware clause at DFARS sec. 252.227-7013.

cisco Systems, Inc.           

170 West Tasman Drive         

 San Jose, California 95134-1706


Cisco Internetwork Operating System SoftwareIOS (tm) C2600 Software (C2600-I-M), Version 12.2(28), RELEASE SOFTWARE (fc5)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2005 by cisco Systems, Inc.Compiled Wed 27-Apr-04 19:01 by miwang
cisco 2620 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory.Processor board ID JAD05190MTZ (4292891495)M860 processor: part number 0, mask 49Bridging software.X.25 software, Version 3.0.0.1 FastEthernet/IEEE 802.3 interface(s)2 Low-speed serial(sync/async) network interface(s)32K bytes of non-volatile configuration memory.63488K bytes of ATA CompactFlash (Read/Write)

         --- System Configuration Dialog ---
Continue with configuration dialog? [yes/no]:n[press n]

 

Press RETURN to get started![press enter]

 

Router>

Router>ena [press tab or enter]
Router>enable[press enter]
Router#

Router#config[press tab or enter]

Router#configure[Press enter]

Enter configuration commands, one per line.  End with CNTL/Z

Router(config)#

Router(config)#int[press tab]

Router(config)#interface Fas[press tab]

Router(config)#interface fastEthernet 0/0[press enter]

Router(config-if)#ip address 10.0.0.1 255.0.0.0[press enter]

Router(config-if)#no shutdown[press enter]

%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up


%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

Router(config-if)#ex[enter]

Router(config)#

Router(config)#int[press tab]

Router(config)#interface se[press tab]

Router(config)#interface serial 0/0[press enter]

Router(config-if)#ip address 20.0.0.1 255.0.0.0[press enter]

Router(config-if)#no shutdown[press enter]

%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up


%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

Router(config-if)#ex[enter]

Router(config)

Router(config)#int[press tab]

Router(config)#interface se[press tab]

Router(config)#interface serial 0/0[press enter]

Router(config-if)#clock rate 64000[if these is DCE & enter]

 

 

 

 

 

 

User mode Commands

Sl. No.

Command

Comments, if any.

1

disconnect

Terminates the suspended telnet session and then logout it.

2

enable

 

3

ping <host-name>

 Used to tests the connectivity.It uses ICMP to initiate the connection.

4

ping <ip-address>

 

5

traceroute <hostname>

 Lists all routers along path to destination and finds the routing problems if any.

6

traceroute <ip-address>

 








Privilegemode Commands

Sl. No.

Command

Comments, if any.

1

clear arp-cache

 

2

configure terminal

Allows to execute commands that change the router's configuration.

3

copy running-config startup-config

It saves the active configuration of the router.

4

copy startup-config running-config

 

5

debug ip packet 

 

6

disable 

Returns to the UserEXEC mode from Privilege mode.

7

disconnect <TELNET_ID>

 

8

erase startup-config

Deletes all the configuration files present on a router.

9

logout 

It exits router from the user or privilege mode.

10

ping <host-name>

Used to tests the connectivity.It uses ICMP to initiate the connection.

11

ping <ip-address>

 

12

reload

 

13

resume <TELNET_ID>

 

14

show access-list 

Displays all accesslists from all protocols present in a specified router.

15

show banner 

 

16

show cdp  

Shows the status of CDP such as holdtime value,no.of packets for every 60sec.

17

show cdp interface  

 It tells the CDP configuration on an interface-by-interface basis.

18

show cdp neighbor 

 

19

show cdp traffic 

 

20

show clock 

 

21

show flash 

Used to view all IOS images and file stored in flash(Default location of IOS images is in flash).

22

show frame-relay lmi 

 Shows the detailed statistics regarding LMI.

23

show frame-relay map 

 

24

show frame-relay pvc <dlci_num> 

Shows all the frame relay PVC's terminated and their statistics at a specified router.

25

show history

Shows the previously executed commands.IOS device stores the last ten commands that are executed.

26

show hosts

 

27

show interfaces

To view interfaces,status,and statistics for an interface.If u don't lists a specific interface,all of the interfaces on the router are listed.

28

show interfaces ethernet 0

 

29

show interfaces loopback 0

 

30

show interfaces serial 0

displays the lmi type that is being used and also sme LMI statisstics.

31

show ip arp

 

32

show ip eigrp neighbors

Shows the list of eigrp neighbors that a specified router has.

33

show ip eigrp neighbors detail

 

34

show ip eigrp topology

Displays the list of successor and feasible successors,as well as other types of routes.

35

show ip eigrp traffic

It shows the information about trafiic statistics for eigrp

36

show ip interface

 

37

show ip interface brief

Verifies the IP configuration.

38

show ip ospf database

 

39

show ip ospf interface

 

40

show ip ospf neighbor detail 

 

41

show ip route

Verifies the configurationof static and default routes on a router.

42

show protocols

 Displays the routing protocols that have been configured and running on a specified router.

43

show running-config

 

44

show sessions

shows the telnet sessions that are currently suspended.

45

show startup-config 

 

46

show version 

Display version information for the hardware and firmware.

47

telnet <host-name>

 

48

telnet <IP-address>

 

49

traceroute <hostname>

 

50

traceroute <ip-address>

Lists all routers along path to destination and finds the routing problems if any.

51

vlan database

Used to access all VLAN and VTP configuration.

52

write erase

 

53

write memory

 

54

write terminal

 

 








Global configuration mode Commands

Sl. No.

Command

Comments, if any.

1

access-list <list-num> {permit | deny} <source-ip-address> 

Only standard access list of the format given is supported.

2

access-list <list-num> {permit | deny} <any>

 

3

access-list <list-num> {permit | deny} <ip-address> <ip-address>

 

4

access-list <list-num> {permit | deny} <host-name> <ip-address>

 

5

banner motd <banner>

It creates the login banner on a specified router.

6

cdp advertise-v2

 

7

cdp holdtime <seconds>

 

8

cdp run

 

9

cdp timer <seconds>

 

10

config-register <value>

Hexadecimal or decimal value that represents the 16-bit configuration register value. It is used at the router start-up. The value range is from 0x0 to 0xFFFF (0 to 65535 in decimal). Normally, the default value is 0x2102

11

dialer-list<list-num>protocol ip permit

 

12

enable password <password>

Sets the paasword.The level number is either 1 or 15.

13

enable secret <password>

 Encrypts the password when it is saved.

14

end 

 

15

hostname <host-name>

 

16

interface ethernet 0

Used to access ethernet interface and enter Interface subconfiguration mode.

17

interface fastethernet <pnum>

 

18

interface loopback 0

 Used to create loopback interface.Port numbers can specify between 0 to 2147483647.

19

interface serial 0 

 

20

interface vlan <vlan_num>

 

21

ip default-gateway <ip-address>

Tells the router which router to use when the router needs to reach the destination thats not in its configured subnet.

22

ip default-network <ip-address>

 

23

ip domain-lookup 

 

24

ip host <name> <ip-address>

Complete syntax for this command: ip host name [tcp-port-number] address1 [address2...address8]

25

ip name-server<ip-address>

By using this Router access the DNS server to resolve the names to ip addresses.

26

ip route <prefix> <mask> {next-hop-ip-addr | interface-type}

The command supported by the simulator are:
ip route <prefix> <mask> <next-hop-ip> and
ip route <prefix> <mask> serial 

27

ip route 0.0.0.0 0.0.0.0 <ip-address>

 

28

ip route<ip-address> <ip-address> <ip-address>

 

29

ip route <ip-address> <ip-address> serial 0

Not supported at this time

30

ip routing

 

31

ipx routing

 

32

isdn switch-type <switch_type>

 

33

line aux

 

34

line console 0 

To enter into console interface.Here 0 specifies the console part.

35

line vty

It supports 16 simultaneous telnet connections and each connection is internally tracked by a number:0-15.

36

no banner motd

 

37

no cdp run

It can globally enable or disable the cdp on a router.

38

no ip domain-lookup

 It disables all the DNS lookups on the router.

39

no ip routing

 

40

no router eigrp

 

41

no router ospf

 

42

no router rip

 

43

no vlan <vlan_num>

 

44

router eigrp <aut_sys>

 

45

router ospf <proc_id>

Process_id is locally significant and is used to differentiate different ospf processes running on a router.

46

router rip

Enters into the RIP routing protocol configuration mode.

47

snmp-server enable traps vtp

 

48

username <name> password <password>

 

 







Interface subconfiguration mode Commands

Sl. No.

Command

Comments, if any.

1

bandwidth <kilobits>

Required bandwidth, in kilobits per second.

2

cdp enable 

 

3

clock rate <bps>

Desired clock rate in bits per second: 1200, 2400, 4800, 9600, 19200, 38400, 56000, 64000 etc.

4

compress stac <num> in

 

5

description <string>

Character string from 1 to 80 characters.

6

dialer-group<dialer_list_#>

 

7

dialer map ip <ip-address> <des-phone>

 

8

dialer map ip <ip-address> name <hostname> <des-phone>

 

9

dialer string< phone_#> <class map_name>

 

10

encapsulation  <encapsulation-type>

Only PPP/HDLC are supported at this time by the simulator.
ex: encapsulation hdlc

11

encapsulation framerelay<num> in

 

12

frame-relay lmi-type <lmi_type>

Specifies the LMI type that is used to communicate between a router and carrier's switch.LMI type is specific to the entire interface,not to a VC.

13

frame-relay map<protocol-name> <ip-address> <dlci_num>

It configures the manual resolution of PVC's.

14

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast

 

15

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast cisco

 

16

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast ietf

 

17

frame-relay map<protocol-name> <ip-address> <dlci_num> cisco

 

18

frame-relay map<protocol-name> <ip-address> <dlci_num> ietf

 

19

ip access-group <num> in

 

20

ip access-group <num> out 

 

21

ip address <ip-address> <sub-net mask> 

 

22

isdn spid1<spid_num>

Defines the spid's that are used to authenticate call requests.Used only on local connection between router and isdn switch.

23

isdn spid2<spid_num>

 

24

keepalive <seconds>

 

25

login

 

26

no bandwidth

 

27

no cdp enable

 

28

no clock rate

 

29

no frame map <protocol name> <ip-address> <dlci_num>

 

30

no frame map<protocol-name> <ip-address> <dlci_num> broadcast

 

31

no frame map<protocol-name> <ip-address> <dlci_num> cisco

 

32

no frame map<protocol-name> <ip-address> <dlci_num> ietf

 

33

no ip address

 

34

no shutdown

 

35

shutdown

It disable the interfaces.Interfaces are enabled by default.

36

shutdown switchport

 

37

speed

 

38

switchport access vlan <vlan_num>

 

39

switchport port-security mac-address sticky<mac_addr>

 

40

switchport port-security maximum <max_macadd>

 

41

switchport port-security violation <violat_mode>

 

 







Line subconfiguration mode Commands

Sl. No.

Command

Comments, if any.

1

exec-timeout <minutes> [seconds] 

seconds is optional. 

2

logging synchronous

 

3

password <password> 

 

 







Subinterface Subconfiguration mode Commands

Sl. No.

Command

Comments, if any.

1

discription<string>

It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.

2

frame-relay interface-dlci<dlci_num>

It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.

3

frame-relay map<protocol-name> <ip-address> <dlci_num>

 

4

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast

 

5

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast cisco

 

6

frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast ietf

 

7

frame-relay map<protocol-name> <ip-address> <dlci_num> cisco

 

8

frame-relay map<protocol-name> <ip-address> <dlci_num> ietf

 

9

ip address<ip-address> <subnet-mask>

 

10

no ip address

 

11

no shutdown

It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.

12

shutdown

It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.

 







IP Routing Protocol Subconfiguration mode Commands

Sl. No.

Command

Comments, if any.

1

network <ip-address>

Used with routing rip, igrp etc.