8.4: DHCPv6 Router Roles Flashcards
A CISCO router can be configured as ____
DHCPv6 Server
DHCPv6 Client
DHCPv6 Relay Agent
Router provides stateless or stateful DHCPv6 services.
Router as DHCPv6 Server
Router interface acquires an IPv6 IP configuration from a DHCPv6 server.
Router DHCPv6 Client
Router provides DHCPv6 forwarding services when the client and the server are located on different networks.
Router as DHCPv6 Relay Agent
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.
DHCPv6 server
There are five steps to configure and verify a router as a stateless DHCPv6 server:
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
CONFIGURE A STATELESS DHCPv6 SERVER
Step 1. Enable IPv6 routing
Use ___ command
ipv6 unicast-routing
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 ____.
ICMPv6 RA messages
CONFIGURE A STATELESS DHCPv6 SERVER
Step 2. Define a DHCPv6 pool name.
Use the ___ command in Router (config-dhcpv6)# prompt
ipv6 dhcp pool POOL-NAME
in configuring pool-name, is it required to use upper case letters?
The pool name does not have to be uppercase. However, using an uppercase name makes it easier to see in a configuration.
CONFIGURE A STATELESS DHCPv6 SERVER
Step 3. Configure the DHCPv6 pool.
Provide the dns and domain name using ___ command
dns-server SERVER
domain-name NAME.COM
CONFIGURE A STATELESS DHCPv6 SERVER
Step 4. Bind the DHCPv6 pool to an interface.
Use the ____ command to bound DHCPv6 pool to the interface
ipv6 dhcp server POOL-NAME
CONFIGURE A STATELESS DHCPv6 SERVER
Step 5. Verify hosts received IPv6 addressing information.
Use __ command to verify stateless DHCP on a Windows host
ipconfig/all
CONFIGURE A STATELESS DHCPv6 CLIENT
Step 1. Enable IPv6 routing.
The DHCPv6 client router needs to have____ enabled
ipv6 unicast-routing
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.
global unicast address
ipv6 enable
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.
ipv6 address autoconfig
CONFIGURE A STATELESS DHCPv6 CLIENT
Step 4. Verify client router is assigned a GUA.
Use the ____command to verify the host configuration as shown.
show ipv6 interface brief
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.
show ipv6 dhcp interface
CONFIGURE A STATEFUL DHCPv6 SERVER
Step 1. Enable IPv6 routing.
The ___ command is required to enable IPv6 routing.
ipv6 unicast-routing
CONFIGURE A STATEFUL DHCPv6 SERVER
Step 2. Define a DHCPv6 pool name.
Create the DHCPv6 pool using the ___ global config command.
ipv6 dhcp pool POOL-NAME
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
address prefix
dns-server ADDRESS
domain-name EXAMPLE.COM
With stateful DHCPv6, all addressing and other configuration parameters must be assigned by the ___.
DHCPv6 server
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.
ipv6 dhcp server POOL-NAME
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 ____.
ipv6 nd managed-config-flag
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 _____.
ipv6 nd prefix default no-autoconfig
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
no ipv6 nd managed-config-flag
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
no ipv6 nd prefix default no-autoconfig
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.
ipconfig /all
CONFIGURE A STATEFUL DHCPv6 CLIENT
Step 1. Enable IPv6 routing.
The DHCPv6 client router needs to have____ enabled.
ipv6 unicast-routing
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.
ipv6 enable
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.
ipv6 address dhcp
CONFIGURE A STATEFUL DHCPv6 CLIENT
Step 4. Verify client router is assigned a GUA.
Use the ____command to verify the host configuration as shown.
show ipv6 interface brief
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.
show ipv6 dhcp interface g0/0/1
DHCPv6 SERVER VERIFICATION COMMANDS
The ____ command verifies the name of the DHCPv6 pool and its parameters
show ipv6 dhcp pool
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.
show ipv6 dhcp binding
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
ipv6 dhcp relay destination ipv6-address [interface-type interface-number]
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.
show ipv6 dhcp interface
VERIFY THE DHCPv6 RELAY AGENT
On R3, use the ____ command to verify if any hosts have been assigned an IPv6 configuration.
show ipv6 dhcp binding
VERIFY THE DHCPv6 RELAY AGENT
Finally, use ___ on PC1 to confirm that it has been assigned an IPv6 configuration
ipconfig /all
