Topology
Addressing
Table
Device
|
Interface
|
IPv6 Address / Prefix Length
|
Default Gateway
|
R1
|
G0/1
|
2001:DB8:ACAD:A::/64 eui-64
|
N/A
|
|
S0/0/1
|
FC00::1/64
|
N/A
|
R3
|
G0/1
|
2001:DB8:ACAD:B::/64 eui-64
|
N/A
|
|
S0/0/0
|
FC00::2/64
|
N/A
|
PC-A
|
NIC
|
SLAAC
|
SLAAC
|
PC-C
|
NIC
|
SLAAC
|
SLAAC
|
Objectives
Part 1: Build the Network and
Configure Basic Device Settings
·
Enable IPv6 unicast routing and
configure IPv6 addressing on the routers.
·
Disable IPv4 addressing and enable
IPv6 SLAAC for the PC network interfaces.
·
Use ipconfig and ping to verify
LAN connectivity.
·
Use show commands to verify IPv6 settings.
Part 2: Configure IPv6 Static and
Default Routes
·
Configure a directly attached
IPv6 static route.
·
Configure a recursive IPv6
static route.
·
Configure a default IPv6 static
route.
Background / Scenario
In this lab, you will configure the entire network
to communicate using only IPv6 addressing, including configuring the routers
and PCs. You will use stateless address auto-configuration (SLAAC) for
configuring the IPv6 addresses for the hosts. You will also configure IPv6
static and default routes on the routers to enable communication to remote
networks that are not directly connected.
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
·
2 Routers (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 and serial cables as
shown in the topology
Part 1:
Build the Network and Configure
Basic Device Settings
In Part 1, you will cable and configure the
network to communicate using IPv6 addressing.
Step 1:
Cable the network as shown in
the topology diagram.
Step 2:
Initialize and reload the
routers and switches.
Step 3:
Enable IPv6 unicast routing and
configure IPv6 addressing on the routers.
a.
Using Tera Term, console into
the router labeled R1 in the topology diagram and assign the router the name
R1.
b.
Within global configuration
mode, enable IPv6 routing on R1.
R1(config)# ipv6
unicast-routing
c.
Configure the network interfaces
on R1 with IPv6 addresses. Notice that IPv6 is enabled on each interface. The G0/1
interface has a globally routable unicast address and EUI-64 is used to create
the interface identifier portion of the address. The S0/0/1 interface has a
privately routable, unique-local address, which is recommended for
point-to-point serial connections.
R1(config)# interface
g0/1
R1(config-if)# ipv6 address 2001:DB8:ACAD:A::/64 eui-64
R1(config-if)# no shutdown
R1(config-if)# interface serial 0/0/1
R1(config-if)# ipv6 address FC00::1/64
R1(config-if)# no shutdown
R1(config-if)# exit
d.
Assign a device name to router
R3.
e.
Within global configuration
mode, enable IPv6 routing on R3.
R3(config)# ipv6
unicast-routing
f.
Configure the network
interfaces on R3 with IPv6 addresses. Notice that IPv6 is enabled on each
interface. The G0/1 interface has a globally routable unicast address and EUI-64
is used to create the interface identifier portion of the address. The S0/0/0
interface has a privately routable, unique-local address, which is recommended
for point-to-point serial connections. The clock rate is set because it is the
DCE end of the serial cable.
R3(config)# interface
gigabit 0/1
R3(config-if)# ipv6 address 2001:DB8:ACAD:B::/64 eui-64
R3(config-if)# no shutdown
R3(config-if)# interface serial 0/0/0
R3(config-if)# ipv6 address FC00::2/64
R3(config-if)# clock rate 128000
R3(config-if)# no shutdown
R3(config-if)# exit
Step 4:
Disable IPv4 addressing and enable
IPv6 SLAAC for the PC network interfaces.
a.
On both PC-A and PC-C, navigate
to the Start menu > Control Panel. Click the Network and Sharing Center link while
viewing with icons. In the Network and Sharing Center window, click the Change adapter settings link on the
left side of the window to open the Network Connections window.
b.
In the Network Connections
window, you see the icons for your network interface adapters. Double-click the
Local Area Connection icon for the PC network interface that is connected to
the switch. Click the Properties to
open the Local Area Connection Properties dialogue window.
c.
With the Local Area Connection
Properties window open, scroll down through the items and uncheck the item Internet Protocol Version 4 (TCP/IPv4)
check box to disable the IPv4 protocol on the network interface.
d.
With the Local Area Connection
Properties window still open, click the Internet
Protocol Version 6 (TCP/IPv6) check box, and then click Properties.
e.
With the Internet Protocol
Version 6 (TCP/IPv6) Properties window open, check to see if the radio buttons
for Obtain an IPv6 address automatically
and Obtain DNS server address
automatically are selected. If not, select them.
f.
With the PCs configured to
obtain an IPv6 address automatically, they will contact the routers to obtain
the network subnet and gateway information, and auto-configure their IPv6
address information. In the next step, you will verify the settings.
Step 5:
Use ipconfig and ping to verify
LAN connectivity.
a.
From PC-A, open a command
prompt, type ipconfig /all and press
Enter. The output should look similar to that shown below. In the output, you
should see that the PC now has an IPv6 global unicast address, a link-local IPv6
address, and a link-local IPv6 default gateway address. You may also see a
temporary IPv6 address and under the DNS server addresses, three site-local
addresses that start with FEC0. Site-local addresses are private addresses that
were meant to be backwards compatible with NAT. However, they are not supported
in IPv6 and are replaced by unique-local addresses.
C:\Users\User1> ipconfig /all
Windows IP Configuration
<Output
omitted>
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix .
:
Description . . . . . . . . . . . : Intel(R) 82577LC Gigabit Network
Connection
Physical Address. . . . . . . . . : 1C-C1-DE-91-C3-5D
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . :
2001:db8:acad:a:7c0c:7493:218d:2f6c(Preferred)
Temporary IPv6 Address. . . . . . :
2001:db8:acad:a:bc40:133a:54e7:d497(Preferred)
Link-local IPv6 Address . . . . . :
fe80::7c0c:7493:218d:2f6c%13(Preferred)
Default Gateway . . . . . . . . . : fe80::6273:5cff:fe0d:1a61%13
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Disabled
Based on your network implementation and the output of the ipconfig /all command, did PC-A receive
IPv6 addressing information from R1?
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
b.
What is the PC-A global unicast
IPv6 address?
____________________________________________________________________________________
c.
What is the PC-A link-local
IPv6 address?
____________________________________________________________________________________
d.
What is the PC-A default
gateway IPv6 address?
____________________________________________________________________________________
e.
From PC-A, use the ping -6 command to issue an IPv6 ping
to the link-local default gateway address. You should see replies from the R1
router.
C:\Users\User1> ping -6 <default-gateway-address>
Did PC-A receive replies to the ping from PC-A to R1?
____________________________________________________________________________________
f.
Repeat Step 5a from PC-C.
Did PC-C receive IPv6 addressing information from R3?
____________________________________________________________________________________
g.
What is the PC-C global unicast
IPv6 address?
____________________________________________________________________________________
h.
What is the PC-C link-local
IPv6 address?
____________________________________________________________________________________
i.
What is the PC-C default
gateway IPv6 address?
____________________________________________________________________________________
j.
From PC-C, use the ping -6 command to ping the PC-C
default gateway.
Did PC-C receive replies to the pings from PC-C to R3?
____________________________________________________________________________________
k.
Attempt an IPv6 ping -6 from PC-A to the PC-C IPv6
address.
C:\Users\User1> ping -6 PC-C-IPv6-address
Was the ping successful? Why or why not?
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Step 6:
Use show commands to verify
IPv6 settings.
a.
Check the status of the
interfaces on R1 with the show ipv6
interface brief command.
What are the two IPv6 addresses for the
G0/1 interface and what kind of IPv6 addresses are they?
____________________________________________________________________________________
What are the two IPv6 addresses for the S0/0/1
interface and what kind of IPv6 addresses are they?
____________________________________________________________________________________
b.
To see more detailed
information on the IPv6 interfaces, type a show
ipv6 interface command on R1 and press Enter.
What are the multicast group addresses for the Gigabit Ethernet 0/1
interface?
____________________________________________________________________________________
What are the multicast group addresses for the S0/0/1 interface?
____________________________________________________________________________________
What is an FF02::1 multicast address used for?
____________________________________________________________________________________
What is an FF02::2 multicast address used for?
____________________________________________________________________________________
What kind of multicast addresses are FF02::1:FF00:1 and
FF02::1:FF0D:1A60, and what are they used for?
____________________________________________________________________________________
c.
View the IPv6 routing table
information for R1 using the show ipv6
route command. The IPv6 routing table should have two connected routes, one
for each interface, and three local routes, one for each interface and one for
multicast traffic to a Null0 interface.
In what way does the routing table output
of R1 reveal why you were unable to ping PC-C from PC-A?
____________________________________________________________________________________
____________________________________________________________________________________
Part 2:
Configure IPv6 Static and
Default Routes
In Part 2, you will configure IPv6 static
and default routes three different ways. You will confirm that the routes have
been added to the routing tables, and you will verify successful connectivity between
PC-A and PC-C.
You will configure three types of IPv6
static routes:
·
Directly Connected IPv6 Static Route – A
directly connected static route is created when specifying the outgoing
interface.
·
Recursive IPv6 Static Route – A recursive static route
is created when specifying the next-hop IP address. This method requires the
router to execute a recursive lookup in the routing table in order to identify
the outgoing interface.
·
Default IPv6 Static Route – Similar to a
quad zero IPv4 route, a default IPv6 static route is created by making the
destination IPv6 prefix and prefix length all zeros, ::/0.
Step 1:
Configure a directly connected IPv6
static route.
In a directly connected IPv6 static route,
the route entry specifies the router outgoing interface. A directly connected
static route is typically used with a point-to-point serial interface. To
configure a directly attached IPv6 static route, use the following command
format:
Router(config)# ipv6 route <ipv6-prefix/prefix-length>
<outgoing-interface-type> <outgoing-interface-number>
a.
On router R1, configure an IPv6
static route to the 2001:DB8:ACAD:B::/64 network on R3, using the R1 outgoing S0/0/1
interface.
R1(config)# ipv6
route 2001:DB8:ACAD:B::/64 serial
0/0/1
R1(config)#
b.
View the IPv6 routing table to
verify the new static route entry.
What is the code letter and routing table
entry for the newly added route in the routing table?
____________________________________________________________________________________
____________________________________________________________________________________
c.
Now that the static route has
been configured on R1, is it now possible to ping the host PC-C from PC-A?
____________________________________________________________________________________
These pings should fail. If the recursive
static route is correctly configured, the ping arrives at PC-C. PC-C sends a
ping reply back to PC-A. However, the ping reply is discarded at R3 because R3
does not have a return route to the 2001:DB8:ACAD:A::/64 network in the routing
table. To successfully ping across the network, you must also create a static
route on R3.
d.
On router R3, configure an IPv6
static route to the 2001:DB8:ACAD:A::/64 network, using the R3 outgoing S0/0/0
interface.
R3(config)# ipv6
route 2001:DB8:ACAD:A::/64 serial
0/0/0
R3(config)#
e.
Now that both routers have
static routes, attempt an IPv6 ping -6
from PC-A to the PC-C global unicast IPv6 address.
Was the ping successful? Why?
____________________________________________________________________________________
Step 2:
Configure a recursive IPv6 static
route.
In a recursive IPv6 static route, the
route entry has the next-hop router IPv6 address. To configure a recursive IPv6
static route, use the following command format:
Router(config)# ipv6 route <ipv6-prefix/prefix-length>
<next-hop-ipv6-address>
a.
On router R1, delete the
directly attached static route and add a recursive static route.
R1(config)# no
ipv6 route 2001:DB8:ACAD:B::/64 serial 0/0/1
R1(config)# ipv6
route 2001:DB8:ACAD:B::/64 FC00::2
R1(config)# exit
b.
On router R3, delete the
directly attached static route and add a recursive static route.
R3(config)# no
ipv6 route 2001:DB8:ACAD:A::/64 serial 0/0/0
R3(config)# ipv6
route 2001:DB8:ACAD:A::/64 FC00::1
R3(config)# exit
c.
View the IPv6 routing table on
R1 to verify the new static route entry.
What is the code letter and routing table
entry for the newly added route in the routing table?
____________________________________________________________________________________
d.
Verify connectivity by issuing
a ping -6 command from PC-A to PC-C.
Was the ping successful? _________________
Note: It may be necessary to disable the PC firewall to ping between
PCs.
Step 3:
Configure a default IPv6 static
route.
In a default static route, the
destination IPv6 prefix and prefix length are all zeros.
Router(config)# ipv6 route ::/0 <outgoing-interface-type> <outgoing-interface-number>
{and/or} <next-hop-ipv6-address>
a.
On router R1, delete the recursive
static route and add a default static route.
R1(config)# no
ipv6 route 2001:DB8:ACAD:B::/64 FC00::2
R1(config)# ipv6
route ::/0 serial 0/0/1
R1(config)#
b.
Delete the recursive static
route and add a default static route on R3.
c.
View the IPv6 routing table on
R1 to verify the new static route entry.
What is the code letter and routing table
entry for the newly added default route in the routing table?
____________________________________________________________________________________
d.
Verify connectivity by issuing
a ping -6 command from PC-A to PC-C.
Was the ping successful?
__________________
Note: It may be necessary to disable the PC firewall to ping between
PCs.
Reflection
1.
This lab focuses on configuring
IPv6 static and default routes. Can you think of a situation where you would
need to configure both IPv6 and IPv4 static and default routes on a router?
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
2.
In practice, configuring an
IPv6 static and default route is very similar to configuring an IPv4 static and
default route. Aside from the obvious differences between the IPv6 and IPv4
addressing, what are some other differences when configuring and verifying an
IPv6 static route as compared to an IPv4 static route?
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
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.
|
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