The ICMPv6 Router Advertisement (RA) message is really a suggestion to some device regarding how to have an IPv6 global unicast address. The unit operating-system can also be the ultimate authority to obtain the IPv6 address. In addition, the ICMPv6 RA message includes the next:


  • Network prefix combined with the prefix length
  • Default gateway address
  • DNS addresses combined with the website name


You will find three choices for Router Advertisement (RA) messages which used to obtain an IPv6 address instantly. The RA message option 1, SLAAC may be the default choice for the router. We are able to configure the router interface for that other option by hand:

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There’s two kinds of IPv6 address auto-configuration. The first is that old type to instantly configure Ip from IPv4 DHCP. Another type is to help make the auto-configuration in IPv6 which empower the hosts to help make the auto-configuration on their own with no need to communicate to others around the network. IPv6 helps make the existence from the network managers simpler, especially with regards to coping with huge address space supplied by IPv6. IPv6 address number is extremely bigger than IPv4.

SLAAC may be the default RA option which states I’m all that’s necessary (Prefix, Prefix-length, Default Gateway)” Consequently, an IPv6 host can configure by itself complete address settings instantly. Using SLAAC a router interface is assigned a 64-bit prefix, and so the last 64 items of its address comes through the host or router with assistance of EUI-64 process. The figure below illustrates the SLAAC Process.

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The host computer transmits Router Solicitation (RS) message towards the Router and also the router reply with RA message such as the IPv6 Prefix, Prefix length and all sorts of various other information.


SLAAC and DHCPv6 stateless

We are able to configure the router interface to transmit a router advertisement (RA) message using SLAAC and stateless DHCPv6. A stateless DHCPv6 server distributes DNS server addresses and domains only. It doesn’t allocate global unicast addresses. SLAAC and Stateless DHCPv6 is RA option 2 which states my details are here however, you should also get additional information like DNS addresses from the DHCPv6 server.

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SLAAC create its very own IPv6 global unicast address, router’s link-local address and also the RA’s source IPv6 address for that default gateway address along with a stateless DHCPv6 server obtain additional information like DNS server address and your own domain name. The figure below illustrates the SLAAC and DHCPv6 process.


1.The clients send RS message towards the router for IPv6 address prefix, prefix length and other associated information.

2.The Router reply with Router Advertisement (RA) message including prefix, prefix length contributing to DHCPv6 server.

3.The customer starts the DHCPv6 process having a DHCPv6 server.


Stateful DHCPv6

It’s work like DHCP for IPv4 addresses. A tool could possibly get its addressing plan and knowledge together with a global unicast address, prefix length, and also the addresses of DNS servers instantly employing a stateful DHCPv6 server. The RA message within this option states which i can’t provide you with any information you possessed. Send a request to DHCPv6 server for your needed information. This method suggests devices:

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  • The link-local address from the router, the RA’s source IPv6 address for that default gateway address.
  • A stateful DHCPv6 server to acquire a global unicast address, DNS server address, website name, and all sorts of additional information.


A stateful DHCPv6 server allocates and maintains a summary of devices which receive IPv6 address. The default gateway address are only able to be acquired in the RA message. The stateless or stateful DHCPv6 server doesn’t pay the default gateway address. The figure below illustrates the DHCPv6 process.


1.The host transmits a request IPv6 address assignment including various other information.

2.The server reply with assigned IPv6 address including along with other related information like lease time, default gateway and DNS server address.

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