12.9.2 laboratory – Configure IPv6 Addresses top top Network devices Answers

Lab – Configure IPv6 Addresses ~ above Network tools (Answers Version)

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Addressing Table



IPv6 Address

Prefix Length

Default Gateway



























Part 1: set Up Topology and Configure straightforward Router and Switch Settings

Part 2: Configure IPv6 Addresses Manually

Part 3: Verify End-to-End Connectivity

Background / Scenario

In this lab, you will certainly configure hosts and device interfaces through IPv6 addresses. Friend will worry show commands to watch IPv6 unicast addresses. Girlfriend will additionally verify end-to-end connectivity utilizing ping and traceroute commands.

Note: The routers provided with CCNA hand-operated labs space Cisco 4221 v Cisco IOS XE release 16.9.4 (universalk9 image). The switches offered in the labs room Cisco Catalyst 2960s through Cisco IOS relax 15.2(2) (lanbasek9 image). Other routers, switches, and also Cisco IOS versions can be used. Depending on the model and also Cisco IOS version, the commands easily accessible and the output produced could vary from what is presented in the labs. Refer to the Router Interface an overview Table in ~ the finish of the lab for the correct interface identifiers.

Note: Make certain that the routers and switches have been erased and also have no startup configurations. If you are unsure, call your Answers.

Answers Note: describe the answers Lab hand-operated for the steps to initialize and reload devices.

Note: The default 2960 switch Database Manager (SDM) template does not assistance IPv6. It might be necessary to problem the command sdm like dual-ipv4-and-ipv6 default to enable IPv6 addressing before using an IPv6 address to the VLAN 1 SVI.

Note: The default bias template used by the move Database Manager (SDM) go not carry out IPv6 resolve capabilities. Verify that SDM is making use of either the dual-ipv4-and-ipv6 layout or the lanbase-routing template. The brand-new template will certainly be supplied after reboot.

S1# present sdm prefer

Follow these actions to assign the dual-ipv4-and-ipv6 template as the default SDM template:

S1# configure terminal

S1(config)# sdm favor dual-ipv4-and-ipv6 default

S1(config)# end

S1# reload

Required Resources1 Router (Cisco 4221 with Cisco IOS XE relax 16.9.4 universal picture or comparable)1 switch (Cisco 2960 v Cisco IOS release 15.2(2) lanbasek9 photo or comparable)2 pcs (Windows with terminal emulation program, such together Tera Term)Console cables to configure the Cisco IOS devices via the console portsEthernet cables as presented in the topology

Note: The Gigabit Ethernet interfaces top top Cisco 4221 routers space autosensing and also an Ethernet straight-through cable may be used between the router and also PC-B. If using one more model Cisco router, it may be crucial to usage an Ethernet crossover cable.


Part 1: Cable the Network and also Configure basic Router and Switch Settings

After cabling the network, initializing and also reloading the router and switch, finish the following:

Step 1: Configure the router.

Assign the hostname and also configure basic an equipment settings.

Step 2: Configure the switch.

Assign the hostname and configure basic maker settings.

Part 2: Configure IPv6 Addresses Manually

Step 1: entrust the IPv6 addresses come Ethernet interfaces ~ above R1.

Assign the IPv6 global unicast addresses, provided in the Addressing Table, come both Ethernet interfaces on R1.

Open configuration window

R1(config)# interface g0/0/0

R1(config-if)# ipv6 resolve 2001:db8:acad:a::1/64

R1(config-if)# no shutdown

R1(config-if)# interface g0/0/1

R1(config-if)# ipv6 address 2001:db8:acad:1::1/64

R1(config-if)# no shutdown

R1(config-if)# end

Answers Note: The IPv6 worldwide prefix 2001:db8::/32 is a booked prefix for use in documentation, as explained in RFC 3849.

Verify the the correct IPv6 unicast attend to is assigned to every interface.

R1# show ipv6 user interface brief









Note: The link-local resolve (fe80::) displayed is based on EUI-64 addressing, which immediately uses the interface Media access Control (MAC) resolve to produce a 128-bit IPv6 link-local address.

To gain the link-local address to enhance the global unicast resolve on the interface, manually get in the link-local addresses on each of the Ethernet interfaces on R1.

R1# config t

Enter configuration commands, one every line. Finish with CNTL/Z.

R1(config)# interface g0/0/0

R1(config-if)# ipv6 address fe80::1 link-local

R1(config-if)# interface g0/0/1

R1(config-if)# ipv6 deal with fe80::1 link-local

R1(config-if)# end

Note: each router user interface belongs come a different network. Packets with a link-local address never leave the neighborhood network; therefore, you can use the exact same link-local deal with on both interfaces.

Use a command of your an option to verify the the link-local address has been adjusted to fe80::1.

R1# present ipv6 interface g0/0/0

GigabitEthernet0/0/0 is up, heat protocol is up

IPv6 is enabled, link-local resolve is FE80::1

No virtual link-local address(es):

global unicast address(es):

2001:DB8:ACAD:A::1, subnet is 2001:DB8:ACAD:A::/64

Joined group address(es):



MTU is 1500 bytes

Close configuration window


Which 2 multicast groups have to be assigned to user interface G0/0/0?

The all-nodes multicast group (FF02::1) and also the Solicited Nodes multicast group (ff02::1:ff00:1).

Step 2: permit IPv6 routing on R1.

On a PC-B command prompt, go into the ipconfig command to study IPv6 attend to information assigned come the pc interface.Question:

Has an IPv6 unicast deal with been assigned to the network user interface card (NIC) ~ above PC-B?


Enable IPv6 routing ~ above R1 utilizing the IPv6 unicast-routing command.

Open configuration window

R1 # configure terminal

R1(config)# ipv6 unicast-routing

R1(config)# exit

Use a command to verify the brand-new multicast group are assigned to interface G0/0/0. An alert that the all-router multicast group (ff02::2) now appears for user interface G0/0/0.

Note: This will allow the pcs to acquire their IP address and default gateway information automatically using Stateless address Autoconfiguration (SLAAC).

R1# display ipv6 interface g0/0/0

GigabitEthernet0/0/0 is up, heat protocol is up

IPv6 is enabled, link-local attend to is FE80::1

No virtual link-local address(es):

an international unicast address(es):

2001:DB8:ACAD:A::1, subnet is 2001:DB8:ACAD:A::/64

Joined team address(es):




MTU is 1500 bytes

Hosts use stateless autoconfig for addresses.

Now the R1 is component of the all-router multicast group FF02::2, re-issue the ipconfig command on PC-B and examine the IPv6 resolve information.Question:

Why go PC-B get the an international Routing Prefix and also Subnet ID that you configured ~ above R1?

On R1 all IPv6 interfaces space now part of the All-router multicast group, FF02::2. This permits it to send Router advertisement (RA) messages with the global Network resolve and Subnet ID details to all nodes top top the LAN. An alert that R1 also sent the link-local address, fe80::1, together the Default Gateway. The pcs will obtain their IPv6 addresses and also default gateway via SLAAC as long as the advertised prefix size is 64 bits .

Step 3: assign IPv6 addresses to the management interface (SVI) ~ above S1.

Assign the IPv6 address for S1. Additionally assign a link-local deal with for this interface.

S1(config)# user interface vlan 1

S1(config-if)# ipv6 resolve 2001:db8:acad:1::b/64

S1(config-if)# ipv6 deal with fe80::b link-local

S1(config-if)# end

Use a command of your choice to verify that the IPv6 addresses are appropriately assigned to the administration interface.

S1# present ipv6 user interface vlan1

Vlan1 is up, heat protocol is up

IPv6 is enabled, link-local attend to is FE80::B

No digital link-local address(es):

worldwide unicast address(es):

2001:DB8:ACAD:1::B, subnet is 2001:DB8:ACAD:1::/64

Joined team address(es):



MTU is 1500 bytes

ICMP error messages minimal to one every 100 milliseconds

ICMP reroutes are enabled

ICMP unreachables are sent

output features: check hwidb

ND DAD is enabled, variety of DAD attempts: 1

ND reachable time is 30000 milliseconds (using 30000)

ND NS retransmit interval is 1000 milliseconds

Close construction window

Step 4: Assign revolution IPv6 addresses come the PCs.

Open the Ethernet Properties home window on for each PC and assign IPv6 addressing.Verify both PCs have the exactly IPv6 address information. Each pc should have two global IPv6 addresses: one static and one SLACC

Part 3: Verify End-to-End Connectivity

From PC-A, ping fe80::1. This is the link-local deal with assigned come G0/0/1 on R1.

Ping the S1 management user interface from PC-A.

Use the tracert command on PC-A come verify that you have end-to-end connectivity to PC-B.

From PC-B, ping PC-A.

From PC-B, ping the link-local resolve for G0/0/0 top top R1.

Note: If end-to-end connectivity is no established, troubleshoot your IPv6 address assignments come verify the you gotten in the addresses properly on all devices.

See more: Tool Review: Ideal In-Sure Push-In Wire Connectors, The Home Depot Logo

Reflection QuestionsWhy deserve to the same link-local address, fe80::1, it is in assigned come both Ethernet interfaces top top R1?

Link-local packets never leave the regional network, so the same link-local address can be provided on an interface linked to a various local network.

What is the Subnet i would of the IPv6 unicast address 2001:db8:acad::aaaa:1234/64?

0 (zero) or 0000 (zeros). The 4th hextet is the Subnet identifier of an IPv6 address with a prefix of /64. In the example, the fourth hextet includes all zeros and also the IPv6 Omitting all 0 Segment ascendancy is utilizing the dual colon to depict the Subnet ID and the very first two hextets the the user interface ID. This is why the subnet of the worldwide unicast address of 2001:acad::aaaa:1234/64 is 2001:db8:acad::/64