6.5.1.2 Lab – Building a Switch and Router Network (Instructor Version)
Instructor 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.
a. Attach the devices shown in the topology diagram, and cable, as necessary.
b. 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.
a. Configure the IP address, subnet mask, and default gateway settings on PC-A.
b. Configure the IP address, subnet mask, and default gateway settings on PC-B.
c. 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.
a. Console into the router and enable privileged EXEC mode.
b. Enter configuration mode.
c. Assign a device name to the router.
d. Disable DNS lookup to prevent the router from attempting to translate incorrectly entered commands as though they were host names.
e. Assign class as the privileged EXEC encrypted password.
f. Assign cisco as the console password and enable login.
g. Assign cisco as the VTY password and enable login.
h. Encrypt the clear text passwords.
i. Create a banner that warns anyone accessing the device that unauthorized access is prohibited.
j. Configure and activate both interfaces on the router.
k. Configure an interface description for each interface indicating which device is connected to it.
l. Save the running configuration to the startup configuration file.
m. Set the clock on the router.
Note: Use the question mark (?) to help with the correct sequence of parameters needed to execute this command.
n. 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.
a. 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/techsupport Copyright (c) 1986-2012 by Cisco Systems, Inc. Compiled Thu 26-Jul-12 19:34 by prod_rel_team ROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1) R1 uptime is 10 minutes System returned to ROM by power-on System image file is "flash0:c1900-universalk9-mz.SPA.152-4.M3.bin" Last reload type: Normal Reload Last reload reason: power-on This product contains cryptographic features and is subject to United States 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 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).
b. Use the show version command to answer the following questions about the switch.
Switch# show version Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2012 by Cisco Systems, Inc. Compiled Sat 28-Jul-12 00:29 by prod_rel_team ROM: Bootstrap program is C2960 boot loader BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(53r)SEY3, RELEASE SOFTWARE (fc1) S1 uptime is 1 hour, 2 minutes System returned to ROM by power-on System image file is "flash:/c2960-lanbasek9-mz.150-2.SE.bin" This product contains cryptographic features and is subject to United States 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.
a. Enter the show ip interface brief command on the router.
R1# show ip interface brief Interface IP-Address OK? Method Status Protocol Embedded-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#
b. Enter the show ip interface brief command on the switch.
Switch# show ip interface brief Interface IP-Address OK? Method Status Protocol Vlan1 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