Lab Objective:
The objective of this lab exercise is to configure routers and switches to be able to communicate with remote networks. By default, devices can only communicate with locally-connected networks.
Lab Purpose:
Configuring a default gateway on routers and switches is a fundamental skill. Default gateways allow routers and switches to be reachable to and from remote subnets. As a Cisco engineer, as well as in the Cisco CCNA exam, you will be expected to know how to configure a router or switch default gateway.
Certification Level:
This lab is suitable for both CCENT and CCNA certification exam preparation.
Lab Difficulty:
This lab has a difficulty rating of 4/10.
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 exercise:
Task 1:
Configure hostnames on Sw1, R1, and R2 as illustrated in the topology above.
Task 2:
Configure Sw1 as a VTP server and configure the VLANs as illustrated above. In addition, configure Sw1 interface FastEthernet0/3 as a trunk using 802.1q encapsulation. Ensure that you place the correct switch interface into VLAN10.
Task 3:
Configure IP addressing on R1 and R2 and interface VLAN20 on Sw1 as illustrated above. In addition, configure a default gateway on Sw1 of 192.168.1.5 and a default route on R1 via FastEthernet0/0. Make VLAN20 the native VLAN on the router. Set the native VLAN on the switch trunk port to 20.
Task 4:
Verify your configuration by pinging from Sw1 to R1’s FastEthernet0/0 address of 192.168.1.1.
Configuration and Verification
Task 1:
For reference information on configuring hostnames, please refer to earlier labs.
Task 2:
For reference information on configuring and verifying VLANs and trunks, please refer to earlier labs.
Task 3:
R1#config t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#interface fastethernet0/0 R1(config-if)#ip address 192.168.1.1 255.255.255.252 R1(config-if)#exit R1(config)#ip route 0.0.0.0 0.0.0.0 fastethernet0/0 R1(config)#^Z R1# R1#show ip interface brief Interface IP-Address OK? Method Status Protocol FastEthernet0/0 192.168.1.1 YES manual up up R2(config)#interface fastethernet0/0 R2(config-if)#description “Connected To Switch Trunk Fa0/3” R2(config-if)#no shutdown R2(config-if)#exit R2(config)#interface fastethernet0/0.10 R2(config-subif)#description Subinterface For VLAN 10 R2(config-subif)#encapsulation dot1Q 10 R2(config-subif)#ip address 192.168.1.2 255.255.255.252 R2(config-subif)#exit R2(config)#interface fastethernet 0/0.20 R2(config-subif)#description Subinterface For VLAN 20 R2(config-subif)#encapsulation dot1Q 20 native R2(config-subif)#ip address 192.168.1.5 255.255.255.252 R2(config-subif)#end R2# R2#show ip interface brief Interface IP-Address OK? Method Status Protocol FastEthernet0/0 unassigned YES manual up up FastEthernet0/0.10 192.168.1.2 YES manual up up FastEthernet0/0.20 192.168.1.5 YES manual up up Sw1(config)#interface vlan1 Sw1(config-if)#shutdown Sw1(config)#interface vlan20 Sw1(config-if)#ip address 192.168.1.6 255.255.255.252 Sw1(config-if)#no shutdown Sw1(config-if)#int f0/3 Switch(config-if)#switchport trunk native vlan20 Sw1(config-if)#exit Sw1(config)#ip default-gateway 192.168.1.5 Sw1(config)#^Z Sw1# Sw1#show ip interface brief Interface IP-Address OK? Method Status Protocol Vlan1 unassigned YES NVRAM administratively down down Vlan20 192.168.1.6 YES manual up up Sw1# Sw1#show ip redirects Default gateway is 192.168.1.5 Host Gateway Last Use Total Uses Interface ICMP redirect cache is empty
The show ip redirects command won’t work on Packet Tracer.
Task 4:
Sw1#ping 192.168.1.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1, timeout is 2 seconds: ..!!! Success rate is 60 percent (3/5), round-trip min/avg/max = 1/3/4 ms