Eotssa's CCNA Configuration Files (Compiled)

Configuring IP Address - 8

1. How do you change the host name of a router?

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Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#host ?
  WORD  This system's network name
Router(config)#hostname R1
R1(config)#$

2. Use a ‘show’ command to view a lsit of R1’s interfaces, their IP addresses, status, etc.

  • Note that show command doesn’t work in config mode, as indicated below. 
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    R1(config)#show ip ?
    % Unrecognized command
    R1(config)#show ip interface brief
                ^
    % Invalid input detected at '^' marker.
    	
    R1(config)#do show ip interface brief
    Interface              IP-Address      OK? Method Status                Protocol 
    GigabitEthernet0/0     unassigned      YES unset  administratively down down 
    GigabitEthernet0/1     unassigned      YES unset  administratively down down 
    GigabitEthernet0/2     unassigned      YES unset  administratively down down 
    Vlan1                  unassigned      YES unset  administratively down down

3. Configure the appropriate IP addresses on R1’s interfaces, and enable the interfaces. Then, configure appropriate interface descriptions.

  • Entered each interface using shortcut.
  • Edit the IP address for each interface, gave description, and turned off shutdown. 
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R1(config)#int g 0/0
R1(config-if)#ip address 15.255.255.254 ?
  A.B.C.D  IP subnet mask
R1(config-if)#ip address 15.255.255.254 255.0.0.0
R1(config-if)#desc ## R1 to SW 1 ##
R1(config-if)#no shutdown

R1(config-if)#
%LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up

R1(config-if)#int g0/1
R1(config-if)#ip address 182.98.255.254 255.255.0.0
R1(config-if)#desc ## R1 to SW 2 ##
R1(config-if)#no shut

R1(config-if)#
%LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up

R1(config-if)#int g0/2
R1(config-if)#ip address 201.191.20.0 255.255.255.0
Bad mask /24 for address 201.191.20.0
R1(config-if)#ip address 201.191.20.254 255.255.255.0
R1(config-if)#desc ## R1 to SW3 ##
R1(config-if)#no shutdown

R1(config-if)#
%LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to up

4. Use a ‘show’ command to verify R1’s interfaces again.

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R1(config-if)#end
R1#
%SYS-5-CONFIG_I: Configured from console by console

R1#show ip int brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     15.255.255.254  YES manual up                    up 
GigabitEthernet0/1     182.98.255.254  YES manual up                    up 
GigabitEthernet0/2     201.191.20.254  YES manual up                    up 
Vlan1                  unassigned      YES unset  administratively down down

5. View the running config to confirm the configuration changes, then save the config

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R1#
R1#show running-config
Building configuration...

Current configuration : 829 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX1524NMDP-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description ## R1 to SW 1 ##
 ip address 15.255.255.254 255.0.0.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description ## R1 to SW 2 ##
 ip address 182.98.255.254 255.255.0.0
 duplex auto
 speed auto
!
interface GigabitEthernet0/2
 description ## R1 to SW3 ##
 ip address 201.191.20.254 255.255.255.0
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
 --More-- 

R1#write
Building configuration...
[OK]

6. Configure the IP addresses of PC1, PC2, and PC3

  • PC’s default gateway should be configured to R1’s IP addresses for their respective interfaces.
    • For example, in PC1, the default gateway should be 15.255.255.254.
    • Press “FastEthernet0” and configure the IP address.
      • Subnet masks are automatically configured since Cisco can recognize a Class A address.

7. Ping from PC1 to PC2 and PC3 to test connectivity

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Cisco Packet Tracer PC Command Line 1.0
C:\>ping 182.98.0.1

Pinging 182.98.0.1 with 32 bytes of data:

Request timed out.
Reply from 182.98.0.1: bytes=32 time<1ms TTL=127
Reply from 182.98.0.1: bytes=32 time<1ms TTL=127
Reply from 182.98.0.1: bytes=32 time<1ms TTL=127

Ping statistics for 182.98.0.1:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>ping 201.191.20.1

Pinging 201.191.20.1 with 32 bytes of data:

Request timed out.
Reply from 201.191.20.1: bytes=32 time<1ms TTL=127
Reply from 201.191.20.1: bytes=32 time<1ms TTL=127
Reply from 201.191.20.1: bytes=32 time=9ms TTL=127

Ping statistics for 201.191.20.1:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 9ms, Average = 3ms

Configuring Interfaces Packet Tracer - 9

1. Configure the hostname of R1, SW1, and SW2

2. Configure the appropriate IP addresses on R1, PC1, PC2, PC3, PC4

3. Manually configure the speed and duplex on interfaces connected to other networking devices (not end hosts)

4. Configure appropriate descriptions on each interface

5. Disable interfaces which are not connected to other devices

6. Save the Configurations

R1 (Steps 1 - 6)

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Router>
Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hostname R1
R1(config)#do show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     unassigned      YES unset  administratively down down 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Vlan1                  unassigned      YES unset  administratively down down
R1(config)#int g0/0
R1(config-if)#ip address 172.16.255.254 255.255.0.0
R1(config-if)#do show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     172.16.255.254  YES manual administratively down down 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Vlan1                  unassigned      YES unset  administratively down down
R1(config-if)#no shutdown

R1(config-if)#
%LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up

R1(config-if)#do show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     172.16.255.254  YES manual up                    up 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Vlan1                  unassigned      YES unset  administratively down down
R1(config-if)#speed 1000
R1(config-if)#duplex full
R1(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to down

R1(config-if)#desc ## to SW1 ##
R1(config-if)#do show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol 
GigabitEthernet0/0     172.16.255.254  YES manual up                    down 
GigabitEthernet0/1     unassigned      YES unset  administratively down down 
GigabitEthernet0/2     unassigned      YES unset  administratively down down 
Vlan1                  unassigned      YES unset  administratively down down
R1(config-if)#interface range g0/1-2
R1(config-if-range)#desc ## NOT IN USE ##
R1(config-if-range)#do sh run 
Building configuration...

Current configuration : 785 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX1524P566-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description ## to SW1 ##
 ip address 172.16.255.254 255.255.0.0
 duplex full
 speed 1000
!
interface GigabitEthernet0/1
 description ## NOT IN USE ##
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/2
 description ## NOT IN USE ##
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
!
!

R1(config-if-range)#end
R1#
%SYS-5-CONFIG_I: Configured from console by console

R1#write
Building configuration...
[OK]
R1#show startup-config
Using 785 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO2911/K9 sn FTX1524P566-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 description ## to SW1 ##
 ip address 172.16.255.254 255.255.0.0
 duplex full
 speed 1000
!
interface GigabitEthernet0/1
 description ## NOT IN USE ##
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/2
 description ## NOT IN USE ##
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
  • Protocol here is down, but it’s a Packet Tracer Problem.

SW2 Steps 1 - 6

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Switch>
Switch>en
Switch#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#host SW2
SW2(config)#do show int status
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/1                        connected    1          auto    auto  10/100BaseTX
Fa0/2                        connected    1          auto    auto  10/100BaseTX
Fa0/3                        notconnect   1          auto    auto  10/100BaseTX
Fa0/4                        notconnect   1          auto    auto  10/100BaseTX
Fa0/5                        notconnect   1          auto    auto  10/100BaseTX
Fa0/6                        notconnect   1          auto    auto  10/100BaseTX
Fa0/7                        notconnect   1          auto    auto  10/100BaseTX
Fa0/8                        notconnect   1          auto    auto  10/100BaseTX
Fa0/9                        notconnect   1          auto    auto  10/100BaseTX
Fa0/10                       notconnect   1          auto    auto  10/100BaseTX
Fa0/11                       notconnect   1          auto    auto  10/100BaseTX
Fa0/12                       notconnect   1          auto    auto  10/100BaseTX
Fa0/13                       notconnect   1          auto    auto  10/100BaseTX
Fa0/14                       notconnect   1          auto    auto  10/100BaseTX
Fa0/15                       notconnect   1          auto    auto  10/100BaseTX
Fa0/16                       notconnect   1          auto    auto  10/100BaseTX
Fa0/17                       notconnect   1          auto    auto  10/100BaseTX
Fa0/18                       notconnect   1          auto    auto  10/100BaseTX
Fa0/19                       notconnect   1          auto    auto  10/100BaseTX
Fa0/20                       notconnect   1          auto    auto  10/100BaseTX
Fa0/21                       notconnect   1          auto    auto  10/100BaseTX
Fa0/22                       notconnect   1          auto    auto  10/100BaseTX
Fa0/23                       notconnect   1          auto    auto  10/100BaseTX
Fa0/24                       notconnect   1          auto    auto  10/100BaseTX
Gig0/1                       notconnect   1          auto    auto  10/100BaseTX
Gig0/2                       notconnect   1          auto    auto  10/100BaseTX

SW2(config)#
SW2(config)#
SW2(config)#int g0/1
SW2(config-if)#speed 1000
SW2(config-if)#duplex full
SW2(config-if)#
%LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up

SW2(config-if)#desc ## TO SWITCH 1 ##
SW2(config-if)#int range f0/1 - 2
SW2(config-if-range)#desc ## TO END HOST ##
SW2(config-if-range)#int range range g0/2, f0/3 - 24
                      ^
% Invalid input detected at '^' marker.
	
SW2(config-if-range)#int range g0/2, f0/3 -24
SW2(config-if-range)#desc ## NOT IN USE ##
SW2(config-if-range)#shutdown

%LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/3, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/4, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/5, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/6, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/7, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/8, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/9, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/10, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/11, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/12, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/13, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/14, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/15, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/16, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/17, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/18, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/19, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/20, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/21, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/22, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/23, changed state to administratively down

%LINK-5-CHANGED: Interface FastEthernet0/24, changed state to administratively down
SW2(config-if-range)#
SW2(config-if-range)#do show int status
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/1     ## TO END HOST ##  connected    1          auto    auto  10/100BaseTX
Fa0/2     ## TO END HOST ##  connected    1          auto    auto  10/100BaseTX
Fa0/3     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/4     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/5     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/6     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/7     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/8     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/9     ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/10    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/11    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/12    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/13    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/14    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/15    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/16    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/17    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/18    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/19    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/20    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/21    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/22    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/23    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Fa0/24    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX
Gig0/1    ## TO SWITCH 1 ##  connected    1          a-full  a-100010/100BaseTX
Gig0/2    ## NOT IN USE ##   disabled 1          auto    auto  10/100BaseTX

SW2(config-if-range)#end
SW2#
%SYS-5-CONFIG_I: Configured from console by console

SW2#write
Building configuration...
[OK]
SW2#show startup-config

PC 1 to PC 4 (Steps 1 - 6)

  • Default gateway is configured to be R1’s IP address.
  • FastEthernet0 is configured to be PC1’s IP address (with its respective subnet mask), etc.