Module 8 SLAAC and DHCPv6 Cisco 2
What destination UDP port do DHCPv6 clients use to send DHCPv6 messages?
546
What flag settings combination is used for stateless DHCP?
A=1 M=0 O=1
What are the flag settings when a host should use the SLAAC only option?
A=1, M=0, O=0
What method is used by a host to verify an IPv6 address is unique on the local network before assigning that address to an interface?
DAD
What process is used in ICMPv6 for a host to verify that an IPv6 address is unique before configuring it on an interface?
DAD
A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?
DHCPv6 INFORMATION-REQUEST
Which destination IP address is used when an IPv6 host sends a DHCPv6 SOLICIT message to locate a DHCPv6 server?
FF02::2
What M flag setting indicates that stateful DHCPv6 is used?
M=1
What DHCPv6 message does a host send to the DHCPv6 server if it is using stateful DHCPv6?
Request
In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts?
SLAAC
Which method best describes stateless DHCP?
SLAAC with stateless DHCPv6 Server
What DHCPv6 message does a host send to look for a DHCPv6 server?
Solicit
Which command is not configured in stateless DHCPv6?
address prefix ipv6-address prefix
An IPv6-enabled router is to acquire its IPv6 GUA from another IPv6 router using SLAAC. Which interface configuration command should be configured on the client router?
ipv6 address autoconfig
An IPv6-enabled router is to acquire its IPv6 GUA from a DHCPv6 server. Which interface configuration command should be configured on client router?
ipv6 address dhcp
Which command should be configured on a router interface to set the router as a stateful DHCPv6 client?
ipv6 address dhcp
Which command is configured on the client LAN interface of the DHCPv6 relay agent?
ipv6 dhcp relay destination
A router is to provide DHCPv6 server services. Which command should be configured on the client facing interface?
ipv6 dhcp server POOL-NAME
Which command must be configured on a router to enable it to join the IPv6 all-routers multicast address ff02::2?
ipv6 unicast-routing
A network administrator is entering the command ipv6 unicast-routing to start configuring DHCPv6 operation on a router. Which statement describes the function of this command?
it is required for sending ICMPv6 RA messages
A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
it must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network
How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?
it sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address
Which address type is automatically created by default on a host interface when no RAs are received?
link-local address
Which method would an IPv6-enabled host using SLAAC employ to learn the address of the default gateway?
router advertisements that are received from the link router
Which ICMPv6 message is sent by a host in an attempt to locate an online IPv6enabled router to obtain IPv6 addressing information?
router solicitation (RS)
Which DHCPv6 verification command would display the link-local and GUA assigned address for each active client?
show ipv6 dhcp binding
What message informs IPv6 enabled interfaces to use stateful DHCPv6 for obtaining an IPv6 address?
the ICMPv6 Router Advertisement
After booting, a client receives an ICMPv6 RA message with the M flag set to 0 and the O flag set to 1. What does this indicate?
the client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information
What are two characteristics of the SLAAC method for IPv6 address configuration? (Choose two.)
-the default gateway of an IPv6 client on a LAN will be the link-local address of the router interface attached to the LAN -IPv6 addressing is dynamically assigned to clients through the use of ICMPv6
Which two ICMPv6 messages are used in the SLAAC process? (Choose two.)
-Router Solicitation (RS) -Router Advertisements (RA)
Which three DHCPv6 roles can a router perform? (Choose all that apply.)
-DHCPV6 client -DHCPV6 relay agent -DHCPV6 server
What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)
-EUI-64 -random generation