What is the difference between stateful and stateless DHCPv6?

Stateful vs Stateless DHCPv6 In this context stateless means that no server keeps track of what addresses have been assigned by which hosts and what addresses are still available for an assignment. A stateful DHCPv6 server provides IPv6 addresses and “other information” to hosts.

Should IPv6 be stateful or stateless?

The stateless approach is used when a site is not concerned with the exact addresses that hosts use. However, the addresses must be unique. The addresses must also be properly routable. The stateful approach is used when a site requires more precise control over exact address assignments.

Why is it beneficial to use stateless DHCPv6?

Stateless DHCPv6 enables a device that has obtained an IPv6 address/prefix to get other configuration parameters from a DHCPv6 server.

What is DHCPv6 stateless?

A stateless DHCPv6 server provides only configuration information to hosts and does not perform any address assignment. Such a server is called “stateless” because it need not maintain any dynamic state for individual clients.

What’s the difference between stateless and stateful DHCPv6?

Stateless DHCPv6 slightly differs from its stateful counterpart. Here, the DHCPv6 server doesn’t assign IPv6 addresses to hosts. A host will auto-configure itself with an IPv6 address while the DHCP server offers it other network information such as domain-name, DNS server, NTP server.

Where are stateful IPv6 entries retained in the DHCPv6 server?

Are stateful IPv6 entries retained in the DHCPv6 server? Stateful autoconfiguration of IPv6 is the equivalent to the use of DHCP in IPv4. It requires a DHCPv6 service to provide the IPv6 address to the client device and that both client device and server maintain the “state” of that address (i.e. lease time, etc).

How does Dnsmasq work for an IPv6 address?

Dnsmasq uses the host’s IPv4 lease to derive the name, network segment and MAC address and assumes that the host will also have an IPv6 address calculated using the SLAAC algorithm, on the same network segment. The address is pinged, and if a reply is received, an AAAA record is added to the DNS for this IPv6 address.

What’s the difference between SLAAC and stateless DHCP?

SLAAC automatically works with a router, while Stateless DHCPv6 gives addresses using SLAAC and extra information using DHCP. The only configuration where the server gives IPv6 addresses is the Stateful one. You need to tune Neighbor Discovery flag with ipv6 nd other-config-flag and ipv6 nd managed-config-flag commands