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IPv6 SLAAC Configuration Quiz
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IPv6 SLAAC Configuration Quiz

Created by
@TopnotchPhosphorus

Questions and Answers

What does the flag 'A' signify in the RA messages sent from R1?

  • Indicates that R1 will not provide any configuration information to the client.
  • Informs the client to use DHCPv6 for address configuration.
  • Indicates the presence of additional optional configuration parameters.
  • Informs the client to use the IPv6 GUA prefix and create its own Interface ID. (correct)

    • Which of the following describes the Router Solicitation (RS) process?

  • A router sends an RA message every 30 seconds to all hosts.
  • A host requests an RA message from a router to learn about address configuration. (correct)
  • A router uses RS to directly assign IP addresses to clients.
  • A host sends an RA message to provide address configuration information.

    • What happens every 200 seconds in the context of R1's configuration?

  • R1 stops sending RA messages to conserve bandwidth.
  • R1 joins the all-routers multicast group again.
  • R1 sends RA messages to the all-nodes multicast address ff02::1. (correct)
  • R1 requests additional information from DHCPv6 servers.

    • Which addresses are included in R1's IPv6 configuration?

    <p>2001:db8:acad:1::1 and fe80::1</p> Signup and view all the answers

    How does SLAAC interact with DHCPv6 when enabled?

    <p>SLAAC can be deployed alongside DHCPv6 for additional configuration.</p> Signup and view all the answers

    Which multicast group does R1 join to send RA messages?

    <p>ff02::1</p> Signup and view all the answers

    What is the significance of the 'O' and 'M' flags being set to 0 in R1's RA messages?

    <p>Clients can expect no additional configuration information.</p> Signup and view all the answers

    What does sending RA messages every 200 seconds accomplish primarily for hosts?

    <p>Provides hosts with the latest IPv6 address configurations.</p> Signup and view all the answers

    What does the A flag set to 1 in an RA message indicate to a client?

    <p>The client should generate its own IPv6 GUA using the advertised prefix.</p> Signup and view all the answers

    Which of the following flags instructs the client to rely solely on the information in the RA message?

    <p>O flag set to 0</p> Signup and view all the answers

    What are the two possible methods for a host to generate its 64-bit interface identifier (ID) in SLAAC?

    <p>Randomly generated or EUI-64</p> Signup and view all the answers

    What happens when a router receives a Router Solicitation (RS) message from a host?

    <p>The router sends a Router Advertisement (RA) message immediately.</p> Signup and view all the answers

    How often does a router send periodic RA messages by default?

    <p>Every 200 seconds</p> Signup and view all the answers

    Which command can be used to verify if a router is enabled for sending RA messages?

    <p>show ipv6 interface</p> Signup and view all the answers

    Which interaction allows SLAAC to function effectively alongside DHCPv6?

    <p>SLAAC can operate independently or with DHCPv6 for configurations.</p> Signup and view all the answers

    What is the purpose of the Duplicated Address Detection (DAD) process in SLAAC?

    <p>To ensure the IPv6 GUA assigned to a host is unique.</p> Signup and view all the answers

    What does the 'O' flag indicate in a Router Advertisement (RA) message?

    <p>The host should seek additional configuration from a DHCPv6 server.</p> Signup and view all the answers

    Which port is used for client to server DHCPv6 messages?

    <p>UDP port 547</p> Signup and view all the answers

    How does a host utilize the information from a stateless RA message?

    <p>It uses the RA message for addressing and contacts a DHCPv6 server for additional info.</p> Signup and view all the answers

    What configuration command is used to enable Stateless DHCPv6 on an interface?

    <p>ipv6 nd other-config-flag</p> Signup and view all the answers

    What happens when the M flag is set to its default value of 0 in a RA message?

    <p>The host will not seek network configuration from a DHCPv6 server.</p> Signup and view all the answers

    What is the primary distinction between stateful and stateless DHCPv6?

    <p>Stateful DHCPv6 provides all configuration information while stateless does not.</p> Signup and view all the answers

    In which situation would a host use SLAAC?

    <p>When the host receives a stateless RA message.</p> Signup and view all the answers

    What is the purpose of periodic RA messages in a network?

    <p>To provide hosts with updated information on network parameters.</p> Signup and view all the answers

    Study Notes

    SLAAC Overview

    • Hosts send Router Solicitation (RS) messages to request Router Advertisements (RA).
    • SLAAC can operate as a standalone service or in conjunction with DHCPv6.

    Enabling SLAAC on R1

    • R1 G0/0/1 interface has:
      • Link-local IPv6 address: fe80::1
      • Global Unicast Address (GUA): 2001:db8:acad:1::1
      • Subnet: 2001:db8:acad:1::/64
      • All-nodes multicast address: ff02::1
    • R1 joins the all IPv6 multicast group, sending RA messages to hosts every 200 seconds.

    Router Groups and RA Messaging

    • R1 responds to the IPv6 all-routers multicast address ff02::2.
    • Verification of group membership can be done with the show ipv6 interface command.

    SLAAC Only Configuration

    • RA messages from R1 have specific flags:
      • A = 1: Instructs clients to construct their own Interface ID using the advertised GUA prefix.
      • O = 0, M = 0: Clients use the RA's information exclusively without additional configurations.
    • Hosts use ICMPv6 RA messages for configuration, negating the need for DHCP.

    Duplicate Address Detection (DAD)

    • Hosts generate 64-bit interface identifiers via random generation or EUI-64.
    • DAD ensures IPv6 GUA uniqueness by sending ICMPv6 Neighbor Solicitation (NS) messages.

    Stateless DHCPv6 Operation

    • An RA indicating stateless DHCPv6 leads hosts to use RA for addressing and contact a DHCPv6 server for extra configurations.
    • The DHCPv6 server provides configuration parameters but does not maintain an address binding list.

    RA Configuration for Stateless DHCPv6

    • Enable stateless DHCPv6 on an interface with the command ipv6 nd other-config-flag, setting O flag to 1.
    • A flag = 1 indicates SLAAC, while O flag = 1 means to contact a DHCPv6 server for additional configuration.

    Stateful DHCPv6 Operation

    • If RA points to stateful DHCPv6, hosts receive all configuration information from the DHCPv6 server.

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    Description

    Test your knowledge on the Stateless Address Autoconfiguration (SLAAC) method for IPv6. This quiz covers the various configurations, including router solicitations and link-local addresses. Dive into the details of IPv6 GUA and subnet addresses with practical examples.

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