6.5.1.2 Lab – Building a Switch and Router Network Answers

6.5.1.2 Lab – Building a Switch and Router Network Answers

Lab – Building a Switch and Router Network (Answers Version)

Answers Note: Red font color or gray highlights indicate text that appears in the instructor copy only.

Topology

Addressing Table

Device Interface IP Address Subnet Mask Default Gateway
R1 G0/0 192.168.0.1 255.255.255.0 N/A
G0/1 192.168.1.1 255.255.255.0 N/A
PC-A NIC 192.168.1.3 255.255.255.0 192.168.1.1
PC-B NIC 192.168.0.3 255.255.255.0 192.168.0.1

Objectives

Part 1: Set Up the Topology and Initialize Devices

Part 2: Configure Devices and Verify Connectivity

Part 3: Display Device Information

Background / Scenario

This is a comprehensive lab to review previously covered IOS commands. In this lab, you will cable the equipment as shown in the topology diagram. You will then configure the devices to match the addressing table. After the configurations have been saved, you will verify your configurations by testing for network connectivity.

After the devices have been configured and network connectivity has been verified, you will use IOS commands to retrieve information from the devices to answer questions about your network equipment.

This lab provides minimal assistance with the actual commands necessary to configure the router. Test your knowledge by trying to configure the devices without referring to the content or previous activities.

Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with Cisco IOS Release 15.2(4)M3 (universalk9 image). The switches used are Cisco Catalyst 2960s with Cisco IOS Release 15.0(2) (lanbasek9 image). Other routers, switches, and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab for the correct interface identifiers.

Note: Ensure that the routers and switches have been erased and have no startup configurations. Consult with your instructor for the procedure to initialize and reload a router and switch.

Required Resources

  • 1 Router (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
  • 1 Switch (Cisco 2960 with Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
  • 2 PCs (Windows 7 or 8 with terminal emulation program, such as Tera Term)
  • Console cables to configure the Cisco IOS devices via the console ports
  • Ethernet cables as shown in the topology

Note: The Gigabit Ethernet interfaces on Cisco 1941 routers are autosensing and an Ethernet straight-through cable may be used between the router and PC-B. If using another model Cisco router, it may be necessary to use an Ethernet crossover cable.

Part 1: Set Up Topology and Initialize Devices

Step 1: Cable the network as shown in the topology.

  1. Attach the devices shown in the topology diagram, and cable, as necessary.
  2. Power on all the devices in the topology.

Step 2: Initialize and reload the router and switch.

If configuration files were previously saved on the router and switch, initialize and reload these devices back to their basic configurations.

Part 2: Configure Devices and Verify Connectivity

In Part 2, you will set up the network topology and configure basic settings, such as the interface IP addresses, device access, and passwords. Refer to the Topology and Addressing Table at the beginning of this lab for device names and address information.

Step 1: Assign static IP information to the PC interfaces.

  1. Configure the IP address, subnet mask, and default gateway settings on PC-A.
  2. Configure the IP address, subnet mask, and default gateway settings on PC-B.
  3. Ping PC-B from a command prompt window on PC-A.
    Why were the pings not successful?
    ____________________________________________________________________________________
    The router interfaces (default gateways) have not been configured yet so Layer 3 traffic is not being routed between subnets.

Step 2: Configure the router.

  1. Console into the router and enable privileged EXEC mode.
  2. Enter configuration mode.
  3. Assign a device name to the router.
  4. Disable DNS lookup to prevent the router from attempting to translate incorrectly entered commands as though they were host names.
  5. Assign class as the privileged EXEC encrypted password.
  6. Assign cisco as the console password and enable login.
  7. Assign cisco as the VTY password and enable login.
  8. Encrypt the clear text passwords.
  9. Create a banner that warns anyone accessing the device that unauthorized access is prohibited.
  10. Configure and activate both interfaces on the router.
  11. Configure an interface description for each interface indicating which device is connected to it.
  12. Save the running configuration to the startup configuration file.
  13. Set the clock on the router.
    Note: Use the question mark (?) to help with the correct sequence of parameters needed to execute this command.
  14. Ping PC-B from a command prompt window on PC-A.
    Were the pings successful? Why?
    ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
    Yes. The router is routing the ping traffic across the two subnets. The default settings for the 2960 switch will automatically turn up the interfaces that are connected to devices.

Part 3: Display Device Information

In Part 3, you will use show commands to retrieve information from the router and switch.

Step 1: Retrieve hardware and software information from the network devices.

  1. Use the show version command to answer the following questions about the router.
    R1# show version
    Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.2(4)M3, RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2012 by Cisco Systems, Inc.Compiled Thu 26-Jul-12 19:34 by prod_rel_teamROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1)R1 uptime is 10 minutesSystem returned to ROM by power-onSystem image file is “flash0:c1900-universalk9-mz.SPA.152-4.M3.bin”Last reload type: Normal ReloadLast reload reason: power-onThis product contains cryptographic features and is subject to UnitedStates and local country laws governing import, export, transfer anduse. Delivery of Cisco cryptographic products does not implythird-party authority to import, export, distribute or use encryption.Importers, exporters, distributors and users are responsible forcompliance with U.S. and local country laws. By using this product youagree to comply with applicable laws and regulations. If you are unableto comply with U.S. and local laws, return this product immediately.A summary of U.S. laws governing Cisco cryptographic products may be found at:http://www.cisco.com/wwl/export/crypto/tool/stqrg.htmlIf you require further assistance please contact us by sending email to

    [email protected]

     

    Cisco CISCO1941/K9 (revision 1.0) with 446464K/77824K bytes of memory.

    Processor board ID FTX1636848Z

    2 Gigabit Ethernet interfaces

    2 Serial(sync/async) interfaces

    1 terminal line

    DRAM configuration is 64 bits wide with parity disabled.

    255K bytes of non-volatile configuration memory.

    250880K bytes of ATA System CompactFlash 0 (Read/Write)

     

    License Info:

     

    License UDI:

     

    ————————————————-

    Device#        PID               SN

    ————————————————-

    *0       CISCO1941/K9          FTX1636848Z    

     

     

    Technology Package License Information for Module:’c1900′

     

    —————————————————————–

    Technology    Technology-package           Technology-package

                  Current       Type           Next reboot 

    ——————————————————————

    ipbase        ipbasek9      Permanent      ipbasek9

    security      None          None           None

    data          None          None           None

     

    Configuration register is 0x2142 (will be 0x2102 at next reload)

    What is the name of the IOS image that the router is running?

    ____________________________________________________________________________________
    Image version may vary, but answers should be something like c1900-universalk9-mz.SPA.152-4.M3.bin.

    How much DRAM memory does the router have?
    ________________________________________________________________________________________________________________________________________________________________________

    Answers may vary, but the default DRAM memory configuration on a 1941 router is 512MB or 524,288K bytes. The total can be calculated by adding the two DRAM numbers together from the output of the show version command: Cisco CISCO1941/K9 (revision 1.0) with 446464K/77824K bytes of memory.
    How much NVRAM memory does the router have?

    ____________________________________________________________________________________

    Answers may vary, but the output from the show version on 1941 router is: 255K bytes of non-volatile configuration memory.
    How much Flash memory does the router have?

    ____________________________________________________________________________________
    Answers may vary, but the default output from the show version command on the 1941 router is 250880K bytes of ATA System CompactFlash 0 (Read/Write).

  2. Use the show version command to answer the following questions about the switch.
    Switch# show versionCisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE, RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2012 by Cisco Systems, Inc.Compiled Sat 28-Jul-12 00:29 by prod_rel_teamROM: Bootstrap program is C2960 boot loaderBOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(53r)SEY3, RELEASE SOFTWARE (fc1)S1 uptime is 1 hour, 2 minutesSystem returned to ROM by power-onSystem image file is “flash:/c2960-lanbasek9-mz.150-2.SE.bin”This product contains cryptographic features and is subject to UnitedStates and local country laws governing import, export, transfer and

    use. Delivery of Cisco cryptographic products does not imply

    third-party authority to import, export, distribute or use encryption.

    Importers, exporters, distributors and users are responsible for

    compliance with U.S. and local country laws. By using this product you

    agree to comply with applicable laws and regulations. If you are unable

    to comply with U.S. and local laws, return this product immediately.

     

    A summary of U.S. laws governing Cisco cryptographic products may be found at:

    http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

     

    If you require further assistance please contact us by sending email to

    [email protected]

     

    cisco WS-C2960-24TT-L (PowerPC405) processor (revision R0) with 65536K bytes of memory.

    Processor board ID FCQ1628Y5LE

    Last reset from power-on

    1 Virtual Ethernet interface

    24 FastEthernet interfaces

    2 Gigabit Ethernet interfaces

    The password-recovery mechanism is enabled.

     

    64K bytes of flash-simulated non-volatile configuration memory.

    Base ethernet MAC Address       : 0C:D9:96:E2:3D:00

    Motherboard assembly number     : 73-12600-06

    Power supply part number        : 341-0097-03

    Motherboard serial number       : FCQ16270N5G

    Power supply serial number      : DCA1616884D

    Model revision number           : R0

    Motherboard revision number     : A0

    Model number                    : WS-C2960-24TT-L

    System serial number            : FCQ1628Y5LE

    Top Assembly Part Number        : 800-32797-02

    Top Assembly Revision Number    : A0

    Version ID                      : V11

    CLEI Code Number                : COM3L00BRF

    Hardware Board Revision Number  : 0x0A

     

     

    Switch Ports Model              SW Version            SW Image                

    —— —– —–              ———-            ———-              

    *    1 26    WS-C2960-24TT-L    15.0(2)SE             C2960-LANBASEK9-M       

     

     

    Configuration register is 0xF

     

    Switch#

    What is the name of the IOS image that the switch is running?
    ____________________________________________________________________________________

    Image version may vary, but answers should be something like c2960-lanbasek9-mz.150-2.SE.bin.

    How much dynamic random access memory (DRAM) does the switch have?____________________________________________________________________________________
    Answers may vary, but the default DRAM memory configuration on a 2960-24TT-L switch is 65536K of memory.
    How much nonvolatile random-access memory (NVRAM) does the switch have?____________________________________________________________________________________
    Answers may vary, but the default non-volatile memory configuration on a 2960-24TT-L switch is 64K bytes.
    What is the model number of the switch
    ____________________________________________________________________________________
    Answers may vary, but the answer should appear in this form: WS-C2960-24TT-L.

Step 2: Display the routing table on the router.

Use the show ip route command on the router to answer the following questions.

R1# show ip route

Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP

       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area

       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2

       E1 – OSPF external type 1, E2 – OSPF external type 2

       i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2

       ia – IS-IS inter area, * – candidate default, U – per-user static route

       o – ODR, P – periodic downloaded static route, H – NHRP, l – LISP

       + – replicated route, % – next hop override

Gateway of last resort is not set

      192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.0.0/24 is directly connected, GigabitEthernet0/0

L        192.168.0.1/32 is directly connected, GigabitEthernet0/0

      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.1.0/24 is directly connected, GigabitEthernet0/1

L        192.168.1.1/32 is directly connected, GigabitEthernet0/1

What code is used in the routing table to indicate a directly connected network? _____

The C designates a directly connected subnet. An L designates a local interface. Both answers are correct.

How many route entries are coded with a C code in the routing table? _________ 2

What interface types are associated to the C coded routes?

_______________________________________________________________________________________

Answers may vary depending of router type, but on the 1941 the correct answer is G0/0 and G0/1.

Step 3: Display interface information on the router.

Use the show interface g0/1 to answer the following questions.

R1# show interfaces g0/1

GigabitEthernet0/1 is up, line protocol is up

  Hardware is CN Gigabit Ethernet, address is fc99.4775.c3e1 (bia fc99.4775.c3e1)

  Internet address is 192.168.1.1/24

  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full Duplex, 100Mbps, media type is RJ45

  output flow-control is unsupported, input flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:06, output 00:00:04, output hang never

  Last clearing of “show interface” counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     17 packets input, 5409 bytes, 0 no buffer

     Received 17 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 13 multicast, 0 pause input

     14 packets output, 1743 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     3 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

What is the operational status of the G0/1 interface?

_______________________________________________________________________________________

GigabitEthernet0/1 is up, line protocol is up

What is the Media Access Control (MAC) address of the G0/1 interface?

_______________________________________________________________________________________

Answers will vary but will appear in the form of: xxxx.xxxx.xxxx, where each x will be replaced with a hexadecimal number.

How is the Internet address displayed in this command?

_______________________________________________________________________________________

Internet address is 192.168.1.1/24.

Step 4: Display a summary list of the interfaces on the router and switch.

There are several commands that can be used to verify an interface configuration. One of the most useful of these is the show ip interface brief command. The command output displays a summary list of the interfaces on the device and provides immediate feedback to the status of each interface.

  1. Enter the show ip interface brief command on the router.
    R1# show ip interface brief
    Interface                  IP-Address      OK? Method Status                ProtocolEmbedded-Service-Engine0/0 unassigned      YES unset  administratively down down   GigabitEthernet0/0         192.168.0.1     YES manual up                    up     GigabitEthernet0/1         192.168.1.1     YES manual up                    up     Serial0/0/0                unassigned      YES unset  administratively down down   

    Serial0/0/1                unassigned      YES unset  administratively down down   

    R1#

  2. Enter the show ip interface brief command on the switch.
    Switch# show ip interface brief
    Interface              IP-Address      OK? Method Status                ProtocolVlan1                  unassigned      YES manual up                    up     FastEthernet0/1        unassigned      YES unset  down                  down   FastEthernet0/2        unassigned      YES unset  down                  down   

    FastEthernet0/3        unassigned      YES unset  down                  down   

    FastEthernet0/4        unassigned      YES unset  down                  down   

    FastEthernet0/5        unassigned      YES unset  up                    up     

    FastEthernet0/6        unassigned      YES unset  up                    up     

    FastEthernet0/7        unassigned      YES unset  down                  down   

    FastEthernet0/8        unassigned      YES unset  down                  down   

    FastEthernet0/9        unassigned      YES unset  down                  down   

    FastEthernet0/10       unassigned      YES unset  down                  down   

    FastEthernet0/11       unassigned      YES unset  down                  down   

    FastEthernet0/12       unassigned      YES unset  down                  down   

    FastEthernet0/13       unassigned      YES unset  down                  down   

    FastEthernet0/14       unassigned      YES unset  down                  down   

    FastEthernet0/15       unassigned      YES unset  down                  down   

    FastEthernet0/16       unassigned      YES unset  down                  down   

    FastEthernet0/17       unassigned      YES unset  down                  down   

    FastEthernet0/18       unassigned      YES unset  down                  down   

    FastEthernet0/19       unassigned      YES unset  down                  down   

    FastEthernet0/20       unassigned      YES unset  down                  down    

    FastEthernet0/21       unassigned      YES unset  down                  down   

    FastEthernet0/22       unassigned      YES unset  down                  down   

    FastEthernet0/23       unassigned      YES unset  down                  down   

    FastEthernet0/24       unassigned      YES unset  down                  down   

    GigabitEthernet0/1     unassigned      YES unset  down                  down   

    GigabitEthernet0/2     unassigned      YES unset  down                  down   

    Switch#

Reflection

  1. If the G0/1 interface showed administratively down, what interface configuration command would you use to turn the interface up?
    _______________________________________________________________________________________
    R1(config-if)# no shut
  2. What would happen if you had incorrectly configured interface G0/1 on the router with an IP address of 192.168.1.2?______________________________________________________________________________________________________________________________________________________________________________
    PC-A would not be able to ping PC-B. This is because PC-B is on a different network than PC-A which requires the default-gateway router to route these packets. PC-A is configured to use the IP address of 192.168.1.1 for the default-gateway router, but this address is not assigned to any device on the LAN. Any packets that need to be sent to the default-gateway for routing will never reach their destination.

Router Interface Summary Table

Router Interface Summary

Router Model Ethernet Interface #1 Ethernet Interface #2 Serial Interface #1 Serial Interface #2
1800 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
1900 Gigabit Ethernet 0/0 (G0/0) Gigabit Ethernet 0/1 (G0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
2801 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/1/0 (S0/1/0) Serial 0/1/1 (S0/1/1)
2811 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
2900 Gigabit Ethernet 0/0 (G0/0) Gigabit Ethernet 0/1 (G0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
Note: To find out how the router is configured, look at the interfaces to identify the router type and how many interfaces the router has. There is no way to effectively list all the combinations of configurations for each router class. This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device. The table does not include any other type of interface, even though a specific router may contain one. An example of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that can be used in Cisco IOS commands to represent the interface.

Device Configs

Router R1

R1# show run

Building configuration…

Current configuration : 1360 bytes

!

version 15.2

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname R1

!

boot-start-marker

boot-end-marker

!

!

enable secret 4 06YFDUHH61wAE/kLkDq9BGho1QM5EnRtoyr8cHAUg.2

!

no aaa new-model

memory-size iomem 15

!

no ip domain lookup

ip cef

no ipv6 cef

multilink bundle-name authenticated

!

interface Embedded-Service-Engine0/0

no ip address

shutdown

!

interface GigabitEthernet0/0

description Connection to PC-B.

ip address 192.168.0.1 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

description Connection to S1.

ip address 192.168.1.1 255.255.255.0 duplex auto

speed auto

!

interface Serial0/0/0

no ip address

shutdown

clock rate 2000000

!

interface Serial0/0/1

no ip address

shutdown

!

ip forward-protocol nd

!

no ip http server

no ip http secure-server

!

control-plane

!

!

banner motd ^C

Unauthorized access prohibited!

^C

!

line con 0

password 7 13061E010803

login

line aux 0

line 2

no activation-character

no exec

transport preferred none

transport input all

transport output pad telnet rlogin lapb-ta mop udptn v120 ssh

stopbits 1

line vty 0 4

password 7 070C285F4D06

login

transport input all

!

scheduler allocate 20000 1000

!

end