Topology
Addressing
Table
|
Device
|
Interface
|
IP Address
|
Subnet Mask
|
|
R1
|
G0/1
|
192.168.1.10
|
255.255.255.0
|
|
|
Lo0
|
209.165.200.225
|
255.255.255.224
|
|
S1
|
VLAN 1
|
192.168.1.1
|
255.255.255.0
|
|
|
VLAN 2
|
192.168.2.1
|
255.255.255.0
|
Objectives
Part 1: Build the Network and
Configure Basic Device Settings
Part 2: Change the SDM Preference
·
Set the SDM preference to
lanbase-routing on S1.
Part 3: Configure DHCPv4
·
Configure DHCPv4 for VLAN 1.
·
Verify DHCPv4 and connectivity.
Part 4: Configure DHCP for Multiple VLANs
·
Assign ports to VLAN 2.
·
Configure DHCPv4 for VLAN 2.
·
Verify DHCPv4 and connectivity.
Part 5: Enable IP Routing
·
Enable IP routing on the switch.
·
Create static routes.
Background / Scenario
A Cisco 2960 switch can function as a
DHCPv4 server. The Cisco DHCPv4 server assigns and manages IPv4 addresses from
identified address pools that are associated with specific VLANs and switch
virtual interfaces (SVIs). The Cisco 2960 switch can also function as a Layer 3
device and route between VLANs and a limited number of static routes. In this lab,
you will configure DHCPv4 for both single and multiple VLANs on a Cisco 2960
switch, enable routing on the switch to allow for communication between VLANs,
and add static routes to allow for communication between all hosts.
Note: This lab provides minimal assistance with the actual commands
necessary to configure DHCP. However, the required commands are provided in
Appendix A. 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 router 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
Step 1:
Cable the network as shown in
the topology.
Step 2:
Initialize and reload the
router and switches.
Step 3:
Configure basic setting on
devices.
a.
Assign device names as shown in
the topology.
b.
Disable DNS lookup.
c.
Assign class as the enable password and assign cisco as the console and vty passwords.
d.
Configure the IP addresses on R1
G0/1 and Lo0 interfaces, according to the Addressing Table.
e.
Configure the IP addresses on
S1 VLAN 1 and VLAN 2 interfaces, according to the Addressing Table.
f.
Save the running configuration
to the startup configuration file.
Part 2:
Change the SDM Preference
The Cisco Switch Database Manager (SDM)
provides multiple templates for the Cisco 2960 switch. The templates can be
enabled to support specific roles depending on how the switch is used in the
network. In this lab, the sdm lanbase-routing template is enabled to allow the
switch to route between VLANs and to support static routing.
Step 1:
Display the SDM preference on
S1.
On S1, issue the show sdm prefer command in privileged EXEC mode. If the template
has not been changed from the factory default, it should still be the default template. The default template does not support
static routing. If IPv6 addressing has been enabled, the template will be dual-ipv4-and-ipv6 default.
S1# show
sdm prefer
The current template is "default"
template.
The selected template optimizes the
resources in
the switch to support this level of
features for
0 routed interfaces and 255 VLANs.
number of unicast mac addresses: 8K
number of IPv4 IGMP groups: 0.25K
number of IPv4/MAC qos aces: 0.125k
number of IPv4/MAC security aces: 0.375k
What is the current template?
_______________________________________________________________________________________
Step 2:
Change the SDM Preference on
S1.
a.
Set the SDM preference to lanbase-routing. (If lanbase-routing is
the current template, please proceed to Part 3.) From global configuration
mode, issue the sdm prefer
lanbase-routing command.
S1(config)# sdm
prefer lanbase-routing
Changes to the running SDM preferences have
been stored, but cannot take effect
until the next reload.
Use 'show sdm prefer' to see what SDM
preference is currently active.
Which template will be available after
reload? __________________________________
b.
The switch must be reloaded for
the template to be enabled.
S1# reload
System configuration has been modified.
Save? [yes/no]: no
Proceed with reload? [confirm]
Note: The new template will be used after reboot even if the running
configuration has not been saved. To save the running configuration, answer yes to save the modified system
configuration.
Step 3:
Verify that lanbase-routing
template is loaded.
Issue the show sdm prefer command to verify that the lanbase-routing template
has been loaded on S1.
S1# show
sdm prefer
The
current template is "lanbase-routing" template.
The
selected template optimizes the resources in
the
switch to support this level of features for
0
routed interfaces and 255 VLANs.
number of unicast mac addresses: 4K
number of IPv4 IGMP groups + multicast routes: 0.25K
number of IPv4 unicast routes: 0.75K
number of directly-connected IPv4 hosts: 0.75K
number of indirect IPv4 routes: 16
number of IPv6 multicast groups: 0.375k
number of directly-connected IPv6 addresses: 0.75K
number of indirect IPv6 unicast routes: 16
number of IPv4 policy based routing aces: 0
number of IPv4/MAC qos aces: 0.125k
number of IPv4/MAC security aces: 0.375k
number of IPv6 policy based routing aces: 0
number of IPv6 qos aces: 0.375k
number of IPv6 security aces: 127
Part 3:
Configure DHCPv4
In Part 3, you will configure DHCPv4 for
VLAN 1, check IP settings on host computers to validate DHCP functionality, and
verify connectivity for all devices in VLAN 1.
Step 1:
Configure DHCP for VLAN 1.
a.
Exclude the first 10 valid host
addresses from network 192.168.1.0/24. Write the command you used in the space
provided.
____________________________________________________________________________________
b.
Create a DHCP pool named DHCP1. Write the command you used in
the space provided.
____________________________________________________________________________________
c.
Assign the network
192.168.1.0/24 for available addresses. Write the command you used in the space
provided.
____________________________________________________________________________________
d.
Assign the default gateway as
192.168.1.1. Write the command you used in the space provided.
____________________________________________________________________________________
e.
Assign the DNS server as
192.168.1.9. Write the command you used in the space provided.
____________________________________________________________________________________
f.
Assign a lease time of 3 days. Write
the command you used in the space provided.
____________________________________________________________________________________
g.
Save the running configuration
to the startup configuration file.
Step 2:
Verify DHCP and connectivity.
a.
On PC-A and PC-B, open the
command prompt and issue the ipconfig command.
If IP information is not present, or if it is incomplete, issue the ipconfig /release command, followed by
the ipconfig /renew command.
For PC-A, list the following:
IP Address: ____________________________________________
Subnet Mask: __________________________________________
Default Gateway: _______________________________________
For PC-B, list the following:
IP Address: ____________________________________________
Subnet Mask: __________________________________________
Default Gateway: _______________________________________
b.
Test connectivity by pinging
from PC-A to the default gateway, PC-B, and R1.
From PC-A, is it possible to ping the VLAN
1 default gateway? __________
From PC-A, is it possible to ping PC-B?
__________
From PC-A, is it possible to ping R1
G0/1? __________
If the answer is no to any of these
questions, troubleshoot the configurations and correct the error.
Part 4:
Configure DHCPv4 for Multiple
VLANs
In Part 4, you will assign PC-A to a port
accessing VLAN 2, configure DHCPv4 for VLAN 2, renew the IP configuration of
PC-A to validate DHCPv4, and verify connectivity within the VLAN.
Step 1:
Assign a port to VLAN 2.
Place port F0/6 into VLAN 2. Write the
command you used in the space provided.
_______________________________________________________________________________________
_______________________________________________________________________________________
Step 2:
Configure DHCPv4 for VLAN 2
a.
Exclude the first 10 valid host
addresses from network 192.168.2.0. Write the command you used in the space
provided.
___________________________________________________________________________________
b.
Create a DHCP pool named DHCP2. Write the command you used in
the space provided.
___________________________________________________________________________________
c.
Assign the network
192.168.2.0/24 for available addresses. Write the command you used in the space
provided.
____________________________________________________________________________________
d.
Assign the default gateway as
192.168.2.1. Write the command you used in the space provided.
____________________________________________________________________________________
e.
Assign the DNS server as
192.168.2.9. Write the command you used in the space provided.
____________________________________________________________________________________
f.
Assign a lease time of 3 days. Write
the command you used in the space provided.
____________________________________________________________________________________
g.
Save the running configuration
to the startup configuration file.
Step 3:
Verify DHCPv4 and connectivity.
a.
On PC-A, open the command
prompt and issue the ipconfig /release
command, followed by ipconfig /renew
command.
For PC-A, list the following:
IP Address: ____________________________________________
Subnet Mask: __________________________________________
Default Gateway: _______________________________________
b.
Test connectivity by pinging
from PC-A to the VLAN 2 default gateway and PC-B.
From PC-A, is it possible to ping the
default gateway? __________
From PC-A, is it possible to ping PC-B?
__________
Were these pings successful? Why?
____________________________________________________________________________________
____________________________________________________________________________________
c.
Issue the show ip route command on S1.
What was the result of this command?
____________________________________________________________________________________
____________________________________________________________________________________
Part 5:
Enable IP Routing
In Part 5, you will enable IP routing on
the switch, which will allow for inter-VLAN communication. For all networks to
communicate, static routes on S1 and R1 must be implemented.
Step 1:
Enable IP routing on S1.
a.
From global configuration mode,
use the ip routing command to enable
routing on S1.
S1(config)# ip
routing
b.
Verify inter-VLAN connectivity.
From PC-A, is it possible to ping PC-B? __________
What function is the switch performing?
____________________________________________________________________________________
c.
View the routing table
information for S1.
What route information is contained in
the output of this command?
____________________________________________________________________________________
____________________________________________________________________________________
d.
View the routing table
information for R1.
What route information is contained in
the output of this command?
____________________________________________________________________________________
____________________________________________________________________________________
e.
From PC-A, is it
possible to ping R1? __________
From PC-A, is it possible to ping Lo0?
__________
Consider the routing table of the two
devices, what must be added to communicate between all networks?
____________________________________________________________________________________
Step 2:
Assign static routes.
Enabling IP routing allows the switch to
route between VLANs assigned on the switch. For all VLANs to communicate with
the router, static routes must be added to the routing table of both the switch
and the router.
a.
On S1, create a default static route
to R1. Write the command you used in the space provided.
____________________________________________________________________________________
b.
On R1, create a static route to
VLAN 2. Write the command you used in the space provided.
____________________________________________________________________________________
c.
View the routing table
information for S1.
How is the default static route
represented?
____________________________________________________________________________________
d.
View the routing table
information for R1.
How is the static route represented?
____________________________________________________________________________________
e.
From PC-A, is it
possible to ping R1? __________
From PC-A, is it possible to ping Lo0?
__________
Reflection
1.
In configuring DHCPv4, why
would you exclude the static addresses prior to setting up the DHCPv4 pool?
_______________________________________________________________________________________
_______________________________________________________________________________________
2.
If multiple DHCPv4 pools are
present, how does the switch assign the IP information to hosts?
_______________________________________________________________________________________
3.
Besides switching, what
functions can the Cisco 2960 switch perform?
_______________________________________________________________________________________
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
Configure DHCPv4
S1(config)# ip dhcp excluded-address 192.168.1.1 192.168.1.10
S1(config)# ip dhcp pool DHCP1
S1(dhcp-config)# network 192.168.1.0 255.255.255.0
S1(dhcp-config)# default-router 192.168.1.1
S1(dhcp-config)# dns-server 192.168.1.9
S1(dhcp-config)# lease 3
Configure DHCPv4 for Multiple VLANs
S1(config)# interface f0/6
S1(config-if)# switchport access vlan 2
S1(config)# ip dhcp excluded-address 192.168.2.1 192.168.2.10
S1(config)# ip dhcp pool DHCP2
S1(dhcp-config)# network 192.168.2.0 255.255.255.0
S1(dhcp-config)# default-router 192.168.2.1
S1(dhcp-config)# dns-server 192.168.2.9
S1(dhcp-config)# lease 3
Enable IP Routing
S1(config)# ip routing
S1(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.10
R1(config)# ip route 192.168.2.0 255.255.255.0 g0/1
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