8.4: DHCPv6 Router Roles

Question 1

A CISCO router can be configured as ____

Answer 1

DHCPv6 Server
DHCPv6 Client
DHCPv6 Relay Agent

Question 2

Router provides stateless or stateful DHCPv6 services.

Answer 2

Router as DHCPv6 Server

Question 3

Router interface acquires an IPv6 IP configuration from a DHCPv6 server.

Answer 3

Router DHCPv6 Client

Question 4

Router provides DHCPv6 forwarding services when the client and the server are located on different networks.

Answer 4

Router as DHCPv6 Relay Agent

Question 5

The stateless DHCPv6 server option requires that the router advertise the IPv6 network addressing information in RA messages. However, the client must contact a ___ for more information.

Answer 5

DHCPv6 server

Question 6

There are five steps to configure and verify a router as a stateless DHCPv6 server:

Answer 6

S1: Enable IPv6 routing
S2: Define a DHCPv6 pool name
S3: Configure the DHCPv6 pool
S4: Bind the DHCPv6 pool to an interface
S5: Verify that the host have received IPV6 addressing info

Question 7

CONFIGURE A STATELESS DHCPv6 SERVER
Step 1. Enable IPv6 routing
Use ___ command

Answer 7

ipv6 unicast-routing

Question 8

CONFIGURE A STATELESS DHCPv6 SERVER
Although it is not necessary for the router to be a stateless DHCPv6 server, it is required for the router to source ____.

Answer 8

ICMPv6 RA messages

Question 9

CONFIGURE A STATELESS DHCPv6 SERVER
Step 2. Define a DHCPv6 pool name.
Use the ___ command in Router (config-dhcpv6)# prompt

Answer 9

ipv6 dhcp pool POOL-NAME

Question 10

in configuring pool-name, is it required to use upper case letters?

Answer 10

The pool name does not have to be uppercase. However, using an uppercase name makes it easier to see in a configuration.

Question 11

CONFIGURE A STATELESS DHCPv6 SERVER
Step 3. Configure the DHCPv6 pool.
Provide the dns and domain name using ___ command

Answer 11

dns-server SERVER
domain-name NAME.COM

Question 12

CONFIGURE A STATELESS DHCPv6 SERVER
Step 4. Bind the DHCPv6 pool to an interface.
Use the ____ command to bound DHCPv6 pool to the interface

Answer 12

ipv6 dhcp server POOL-NAME

Question 13

CONFIGURE A STATELESS DHCPv6 SERVER
Step 5. Verify hosts received IPv6 addressing information.

Use __ command to verify stateless DHCP on a Windows host

Answer 13

ipconfig/all

Question 14

CONFIGURE A STATELESS DHCPv6 CLIENT
Step 1. Enable IPv6 routing.
The DHCPv6 client router needs to have____ enabled

Answer 14

ipv6 unicast-routing

Question 15

CONFIGURE A STATELESS DHCPv6 CLIENT
Step 2. Configure client router to create an LLA.

The client router needs to have a link-local address. An IPv6 link-local address is created on a router interface when a___ is configured. It can also be created without a GUA using the ___ interface configuration command.

Answer 15

global unicast address
ipv6 enable

Question 16

CONFIGURE A STATELESS DHCPv6 CLIENT
Step 3. Configure client router to use SLAAC.

The client router needs to be configured to use SLAAC to create an IPv6 configuration. The___ command enables the automatic configuration of IPv6 addressing using SLAAC.

Answer 16

ipv6 address autoconfig

Question 17

CONFIGURE A STATELESS DHCPv6 CLIENT
Step 4. Verify client router is assigned a GUA.

Use the ____command to verify the host configuration as shown.

Answer 17

show ipv6 interface brief

Question 18

CONFIGURE A STATELESS DHCPv6 CLIENT
Step 5. Verify client router received other DHCPv6 information.

The ___ g0/0/1 command confirms that the DNS and domain names were also learned by R3.

Answer 18

show ipv6 dhcp interface

Question 19

CONFIGURE A STATEFUL DHCPv6 SERVER
Step 1. Enable IPv6 routing.
The ___ command is required to enable IPv6 routing.

Answer 19

ipv6 unicast-routing

Question 20

CONFIGURE A STATEFUL DHCPv6 SERVER
Step 2. Define a DHCPv6 pool name.

Create the DHCPv6 pool using the ___ global config command.

Answer 20

ipv6 dhcp pool POOL-NAME

Question 21

CONFIGURE A STATEFUL DHCPv6 SERVER
Step 3. Configure the DHCPv6 pool.
The ___command is used to indicate the pool of addresses to be allocated by the server.

Other info provided are dns server and domain name using __ commands

Answer 21

address prefix
dns-server ADDRESS
domain-name EXAMPLE.COM

Question 22

With stateful DHCPv6, all addressing and other configuration parameters must be assigned by the ___.

Answer 22

DHCPv6 server

Question 23

CONFIGURE A STATEFUL DHCPv6 SERVER
Step 4. Bind the DHCPv6 pool to an interface.
The DHCPv6 pool has to be bound to the interface using the____ interface config command.

Answer 23

ipv6 dhcp server POOL-NAME

Question 24

CONFIGURE A STATEFUL DHCPv6 SERVER
Step 4. Bind the DHCPv6 pool to an interface.
The M flag is manually changed from 0 to 1 using the interface command ____.

Answer 24

ipv6 nd managed-config-flag

Question 25

CONFIGURE A STATEFUL DHCPv6 SERVER Step 4. Bind the DHCPv6 pool to an interface. The A flag is manually changed from 1 to 0 using the interface command _____.

Answer 25

ipv6 nd prefix default no-autoconfig

Question 26

CONFIGURE A STATEFUL DHCPv6 SERVER Step 4. Bind the DHCPv6 pool to an interface. use the ____ command to set the M flag back to its default of 0

Answer 26

no ipv6 nd managed-config-flag

Question 27

CONFIGURE A STATEFUL DHCPv6 SERVER Step 4. Bind the DHCPv6 pool to an interface. The ___ command sets the A flag back to its default of 1

Answer 27

no ipv6 nd prefix default no-autoconfig

Question 28

CONFIGURE A STATEFUL DHCPv6 SERVER Step 5. Verify hosts received IPv6 addressing information. To verify on a Windows host, use the ____command to verify the stateless DHCP configuration method.

Answer 28

ipconfig /all

Question 29

CONFIGURE A STATEFUL DHCPv6 CLIENT Step 1. Enable IPv6 routing. The DHCPv6 client router needs to have____ enabled.

Answer 29

ipv6 unicast-routing

Question 30

CONFIGURE A STATEFUL DHCPv6 CLIENT Step 2. Configure client router to create an LLA. In the output, the____ command is configured on the R3 Gigabit Ethernet 0/0/1 interface.

Answer 30

ipv6 enable

Question 31

CONFIGURE A STATEFUL DHCPv6 CLIENT Step 3. Configure client router to use DHCPv6. The_____command configures R3 to solicit its IPv6 addressing information from a DHCPv6 server.

Answer 31

ipv6 address dhcp

Question 32

CONFIGURE A STATEFUL DHCPv6 CLIENT Step 4. Verify client router is assigned a GUA. Use the ____command to verify the host configuration as shown.

Answer 32

show ipv6 interface brief

Question 33

CONFIGURE A STATEFUL DHCPv6 CLIENT Step 5. Verify client router received other DHCPv6 information. The ____command confirms that the DNS and domain names were learned by R3.

Answer 33

show ipv6 dhcp interface g0/0/1

Question 34

DHCPv6 SERVER VERIFICATION COMMANDS The ____ command verifies the name of the DHCPv6 pool and its parameters

Answer 34

show ipv6 dhcp pool

Question 35

DHCPv6 SERVER VERIFICATION COMMANDS Use the ____ command output to display the IPv6 link-local address of the client and the global unicast address assigned by the server.

Answer 35

show ipv6 dhcp binding

Question 36

CONFIGURE A DHCPv6 RELAY AGENT This command is configured on the interface facing the DHCPv6 clients and specifies the DHCPv6 server address and egress interface to reach the server

Answer 36

ipv6 dhcp relay destination ipv6-address [interface-type interface-number]

Question 37

VERIFY THE DHCPv6 RELAY AGENT The DHCPv6 relay agent can be verified using the ___command. This will verify that the G0/0/1 interface is in relay mode.

Answer 37

show ipv6 dhcp interface

Question 38

VERIFY THE DHCPv6 RELAY AGENT On R3, use the ____ command to verify if any hosts have been assigned an IPv6 configuration.

Answer 38

show ipv6 dhcp binding

Question 39

VERIFY THE DHCPv6 RELAY AGENT Finally, use ___ on PC1 to confirm that it has been assigned an IPv6 configuration

Answer 39

ipconfig /all