IPv6 Address Source Sorter

About this interactive

An IPv6 host can be set up three ways, and each piece of its setup comes from somewhere different. With a static setup an administrator types the address and prefix length in by hand. With SLAAC, the preferred way, the host builds its own link-local address and interface ID, asks the router for the network, joins the router's prefix to its own 64 bits, and checks with duplicate address detection that nobody else holds the result. With DHCPv6 a server takes part: stateless DHCPv6 adds settings such as a domain search list to a SLAAC address, and stateful DHCPv6 leases the whole address and keeps a record of it. One piece never comes from a DHCPv6 server: the default gateway. On SLAAC and DHCPv6 networks hosts learn it from the router advertisement's source address (on a static host an administrator can type it in), and the advertisement also carries the flag that tells hosts to go to a DHCPv6 server at all. Eight of the twenty cards are drawn each run, and after you check, every card says where its piece comes from and why.

What you'll learn

Say where each piece of a host's IPv6 setup comes from: the host itself, a router advertisement, a DHCPv6 server or an administrator
Tell static assignment, SLAAC, stateless DHCPv6 and stateful DHCPv6 apart by what each one supplies, including the default gateway, which never comes from a DHCPv6 server

Aligned to

Cisco CCNA

1.8 Configure and verify IPv6 addressing and prefix

CompTIA Network+

3.4 Given a scenario, implement IPv4 and IPv6 network services

Key terms

Stateless Address Autoconfiguration: An IPv6 mechanism that allows devices to automatically generate a globally unique IPv6 address using the network prefix from a Router Advertisement combined with a locally generated interface identifier, without requiring a DHCP server. SLAAC uses the EUI-64 process or a random interface ID to create the host portion of the address.
Stateless DHCPv6: A DHCPv6 mode in which the server provides supplemental configuration information such as DNS server addresses but does not assign or track IPv6 addresses; clients generate their own addresses via SLAAC.
Stateful DHCPv6: A DHCPv6 mode in which the server assigns and tracks IPv6 addresses from a defined prefix pool in addition to providing other configuration parameters.
Static IP Address: A fixed IP address manually assigned to a device that does not change over time, as opposed to one assigned automatically by DHCP.
Default Gateway: The router that a device uses to send traffic to destinations outside its local network.
Duplicate Address Detection: An IPv6 mechanism that verifies a newly assigned address is unique on the link before it is used for communication. A device sends a Neighbor Solicitation for its tentative address; if no response is received, the address is confirmed unique and assigned.

Topics

Ipv6 Slaac Dhcpv6 Static Addressing Interactive Categorize

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