Topology
Addressing Table
Device
|
Interface
|
IP Address
|
Subnet Mask
|
Default Gateway
|
R1
|
G0/0
|
192.168.20.1
|
255.255.255.0
|
N/A
|
|
G0/1
|
192.168.10.1
|
255.255.255.0
|
N/A
|
S1
|
VLAN 10
|
192.168.10.11
|
255.255.255.0
|
192.168.10.1
|
S2
|
VLAN 10
|
192.168.10.12
|
255.255.255.0
|
192.168.10.1
|
PC-A
|
NIC
|
192.168.10.3
|
255.255.255.0
|
192.168.10.1
|
PC-B
|
NIC
|
192.168.20.3
|
255.255.255.0
|
192.168.20.1
|
Objectives
Part 1: Build the Network and
Configure Basic Device Settings
Part 2: Configure Switches with VLANs
and Trunking
Part 3: Verify Trunking, VLANs,
Routing, and Connectivity
Background / Scenario
Legacy inter-VLAN routing is seldom used
in today’s networks; however, it is helpful to configure and understand this
type of routing before moving on to router-on-a-stick (trunk-based) inter-VLAN
routing or configuring Layer-3 switching. Also, you may encounter per-interface
inter-VLAN routing in organizations with very small networks. One of the
benefits of legacy inter-VLAN routing is ease of configuration.
In this lab, you will set up one router
with two switches attached via the router Gigabit Ethernet interfaces. Two
separate VLANs will be configured on the switches, and you will set up routing
between the VLANs.
Note: This lab provides minimal assistance with the actual commands
necessary to configure the router and switches. The required switch VLAN configuration
commands are provided in Appendix A of this lab. Test your knowledge by trying
to configure the devices without referring to the appendix.
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: Make sure that the routers and switches have been erased and have
no startup configurations. If you are unsure, contact your instructor.
Required Resources
·
1 Router (Cisco 1941 with Cisco
IOS Release 15.2(4)M3 universal image or comparable)
·
2 Switches (Cisco 2960 with
Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
·
2 PCs (Windows 7, Vista, or XP
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
Part 1:
Build the Network and Configure
Basic Device Settings
In Part 1, you will set up the network
topology and clear any configurations, if necessary.
Step 1:
Cable the network as shown in
the topology.
Step 2:
Initialize and reload the
router and switches.
Step 3:
Configure basic settings for R1.
a.
Disable DNS lookup.
b.
Assign the device name.
c.
Assign class as the privileged EXEC mode encrypted password.
d.
Assign cisco as the console and vty line password and enable login.
e.
Configure addressing on G0/0
and G0/1 and enable both interfaces.
Step 4:
Configure basic settings on S1
and S2.
a.
Disable DNS lookup.
b.
Assign the device name.
c.
Assign class as the privileged EXEC mode encrypted password.
d.
Assign cisco as the console and vty line password and enable login.
Step 5:
Configure basic settings on
PC-A and PC-B.
Configure PC-A and PC-B with IP addresses
and a default gateway address according to the Addressing Table.
Part 2:
Configure Switches with VLANs
and Trunking
In Part 2, you will configure the switches
with VLANs and trunking.
Step 1:
Configure VLANs on S1.
a.
On S1, create VLAN 10. Assign Student as the VLAN name.
b.
Create VLAN 20. Assign Faculty-Admin as the VLAN name.
c.
Configure F0/1 as a trunk port.
d.
Assign ports F0/5 and F0/6 to
VLAN 10 and configure both F0/5 and F0/6 as access ports.
e.
Assign an IP address to VLAN 10
and enable it. Refer to the Addressing Table.
f.
Configure the default gateway according
to the Addressing Table.
Step 2:
Configure VLANs on S2.
a.
On S2, create VLAN 10. Assign Student as the VLAN name.
b.
Create VLAN 20. Assign Faculty-Admin as the VLAN name.
c.
Configure F0/1 as a trunk port.
d.
Assign ports F0/11 and F0/18 to
VLAN 20 and configure both F0/11 and F0/18 as access ports.
e.
Assign an IP address to VLAN 10
and enable it. Refer to the Addressing Table.
f.
Configure the default gateway according
to the Addressing Table.
Part 3:
Verify Trunking, VLANs, Routing,
and Connectivity
Step 1:
Verify the R1 routing table.
a.
On R1, issue the show ip route command. What routes are
listed on R1?
____________________________________________________________________________________
____________________________________________________________________________________
b.
On both S1 and S2, issue the show interface trunk command. Is the
F0/1 port on both switches set to trunk? ______
c.
Issue a show vlan brief command on both S1 and S2. Verify that VLANs 10 and 20 are active and that
the proper ports on the switches are in the correct VLANs. Why is F0/1
not listed in any of the active VLANs?
____________________________________________________________________________________
d.
Ping from PC-A in VLAN 10 to
PC-B in VLAN 20. If Inter-VLAN routing is functioning correctly, the pings
between the 192.168.10.0 network and the 192.168.20.0 should be successful.
Note: It may be necessary to disable the PC firewall to ping between PCs.
e.
Verify connectivity between
devices. You should be able to ping between all devices. Troubleshoot if you
are not successful.
Reflection
What is an advantage of using legacy
inter-VLAN routing?
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
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 type of router 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.
|
Appendix A: Configuration Commands
Switch S1
S1(config)# vlan 10
S1(config-vlan)# name Student
S1(config-vlan)# exit
S1(config)# vlan 20
S1(config-vlan)# name Faculty-Admin
S1(config-vlan)# exit
S1(config)# interface f0/1
S1(config-if)# switchport mode trunk
S1(config-if)# interface range f0/5 – 6
S1(config-if-range)# switchport mode access
S1(config-if-range)# switchport access vlan 10
S1(config-if-range)# interface vlan 10
S1(config-if)# ip address 192.168.10.11 255.255.255.0
S1(config-if)# no shut
S1(config-if)# exit
S1(config)# ip default-gateway 192.168.10.1
Switch S2
S2(config)# vlan 10
S2(config-vlan)# name Student
S2(config-vlan)# exit
S2(config)# vlan 20
S2(config-vlan)# name Faculty-Admin
S2(config-vlan)# exit
S2(config)# interface f0/1
S2(config-if)# switchport mode trunk
S2(config-if)# interface f0/11
S2(config-if)# switchport mode access
S2(config-if)# switchport access vlan 20
S2(config-if)# interface f0/18
S2(config-if)# switchport mode access
S2(config-if)# switchport access vlan 20
S2(config-if-range)# interface vlan 10
S2(config-if)#ip address 192.168.10.12 255.255.255.0
S2(config-if)# no shut
S2(config-if)# exit
S2(config)#
ip default-gateway 192.168.10.1
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