Lab Objective:
The objective of this lab exercise is for you to learn and understand how to configure name resolution on Cisco IOS devices.
Lab Purpose:
Configuring name resolution on Cisco IOS devices is a fundamental skill. Name resolution can be used to provide hostnames to Layer 3 address mapping instead of DNS services. It is typically used in small networks with a few internetwork devices. As a Cisco engineer, as well as in the Cisco CCNA exam, you will be expected to know how to configure name resolution on Cisco IOS devices.
Certification Level:
This lab is suitable for CCNA certification exam preparation.
Lab Difficulty:
This lab has a difficulty rating of 5/10.
Readiness Assessment:
When you are ready for your certification exam, you should complete this lab in no more than 10 minutes.
Lab Topology:
Please use the following topology to complete this lab:
Task 1:
Configure a hostname on your router. Task 2: Configure R1 to provide clocking to R3 at rate of 256 Kbps. Next, configure the IP addresses on R1 and R3 as illustrated in the network topology.
Task 3:
Configure R1 with a static default route pointing to R3. Next, configure the two Loopback interfaces on R2 as illustrated in the network topology.
Task 4:
Configure local host name resolution on R1 for R3 Loopback0 and Loopback1. Use the IP addresses of the Loopback interfaces and the hostnames R3-LOOP0 and R3-LOOP1, respectively, on R1.
Task 5:
Test your configurations by pinging R3-LOOP0 and R3-LOOP1. These hostnames should be resolved to the IP addresses of the Loopback0 and Loopback1 interfaces on R3, respectively.
Configuration and Verification
Task 1:
For reference information on configuring hostnames, please refer to earlier labs.
Task 2:
For reference information on configuring DCE clocking, please refer to earlier labs.
Task 3:
R1#conf t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#ip route 0.0.0.0 0.0.0.0 serial 0/0 192.168.254.2 R1(config)#end R1# R3#conf t Enter configuration commands, one per line. End with CTRL/Z. R3(config)#int lo0 R3(config-if)#ip add 10.0.0.3 255.255.255.0 R3(config-if)#exit R3(config)#int lo1 R3(config-if)#ip add 10.1.1.3 255.255.255.0 R3(config-if)#exit R3(config)#end R3#
Task 4:
R1#conf t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#ip host R3-LOOP0 10.0.0.3 R1(config)#ip host R3-LOOP1 10.1.1.3 R1(config)#end R1# R1#show host Default domain is not set Name/address lookup uses domain service Name servers are 255.255.255.255 Codes: UN - unknown, EX - expired, OK - OK, ?? – revalidate, temp - temporary, perm – permanent, NA - Not Applicable None - Not defined Host Port Flags Age Type Address(es) R3-LOOP0 None (perm, OK) 0 IP 10.0.0.3 R3-LOOP1 None (perm, OK) 0 IP 10.1.1.3
Task 5:
R1#ping R3-LOOP0 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 8/10/16 ms R1#ping R3-LOOP1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 8/11/12 ms