How does router advertisement in ipv6 avoid IP conflict?

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If a router advertisement sends the range of subnet, and the client can choose an IP from it, how is there no conflict with another client that has chosen the same address?






router ipv6 dhcpv6 icmpv6







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    If a router advertisement sends the range of subnet, and the client can choose an IP from it, how is there no conflict with another client that has chosen the same address?






    router ipv6 dhcpv6 icmpv6







    share|improve this question









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      up vote
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      down vote

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      If a router advertisement sends the range of subnet, and the client can choose an IP from it, how is there no conflict with another client that has chosen the same address?






      router ipv6 dhcpv6 icmpv6







      share|improve this question









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      junior_software is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      If a router advertisement sends the range of subnet, and the client can choose an IP from it, how is there no conflict with another client that has chosen the same address?






      router ipv6 dhcpv6 icmpv6




      router ipv6 dhcpv6 icmpv6






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      edited 16 mins ago









      The Guy with The Hat

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      asked 11 hours ago









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          1 Answer
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          A host performs Duplicate Address Detection (DAD) before actually activating the given address on the interface



          RFC 2462 has to say about this:




          5.4. Duplicate Address Detection



          Duplicate Address Detection is performed on unicast addresses prior
          to assigning them to an interface whose DupAddrDetectTransmits

          variable is greater than zero. Duplicate Address Detection MUST take

          place on all unicast addresses, regardless of whether they are

          obtained through stateful, stateless or manual configuration, with

          the exception of the following cases: [...]




          The original RFC was updated/modernized by RFC 4429 and further on by RFC 7527



          EDIT
          To nitpick a bit: the correct sequence of RFCs is more precisely:



          RFC 1971, obsoleted by RFC 2462, obsoleted by RFC 4862, updated by RFC 7527






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            up vote
            8
            down vote













            A host performs Duplicate Address Detection (DAD) before actually activating the given address on the interface



            RFC 2462 has to say about this:




            5.4. Duplicate Address Detection



            Duplicate Address Detection is performed on unicast addresses prior
            to assigning them to an interface whose DupAddrDetectTransmits

            variable is greater than zero. Duplicate Address Detection MUST take

            place on all unicast addresses, regardless of whether they are

            obtained through stateful, stateless or manual configuration, with

            the exception of the following cases: [...]




            The original RFC was updated/modernized by RFC 4429 and further on by RFC 7527



            EDIT
            To nitpick a bit: the correct sequence of RFCs is more precisely:



            RFC 1971, obsoleted by RFC 2462, obsoleted by RFC 4862, updated by RFC 7527






            share|improve this answer


























              up vote
              8
              down vote













              A host performs Duplicate Address Detection (DAD) before actually activating the given address on the interface



              RFC 2462 has to say about this:




              5.4. Duplicate Address Detection



              Duplicate Address Detection is performed on unicast addresses prior
              to assigning them to an interface whose DupAddrDetectTransmits

              variable is greater than zero. Duplicate Address Detection MUST take

              place on all unicast addresses, regardless of whether they are

              obtained through stateful, stateless or manual configuration, with

              the exception of the following cases: [...]




              The original RFC was updated/modernized by RFC 4429 and further on by RFC 7527



              EDIT
              To nitpick a bit: the correct sequence of RFCs is more precisely:



              RFC 1971, obsoleted by RFC 2462, obsoleted by RFC 4862, updated by RFC 7527






              share|improve this answer
























                up vote
                8
                down vote










                up vote
                8
                down vote









                A host performs Duplicate Address Detection (DAD) before actually activating the given address on the interface



                RFC 2462 has to say about this:




                5.4. Duplicate Address Detection



                Duplicate Address Detection is performed on unicast addresses prior
                to assigning them to an interface whose DupAddrDetectTransmits

                variable is greater than zero. Duplicate Address Detection MUST take

                place on all unicast addresses, regardless of whether they are

                obtained through stateful, stateless or manual configuration, with

                the exception of the following cases: [...]




                The original RFC was updated/modernized by RFC 4429 and further on by RFC 7527



                EDIT
                To nitpick a bit: the correct sequence of RFCs is more precisely:



                RFC 1971, obsoleted by RFC 2462, obsoleted by RFC 4862, updated by RFC 7527






                share|improve this answer














                A host performs Duplicate Address Detection (DAD) before actually activating the given address on the interface



                RFC 2462 has to say about this:




                5.4. Duplicate Address Detection



                Duplicate Address Detection is performed on unicast addresses prior
                to assigning them to an interface whose DupAddrDetectTransmits

                variable is greater than zero. Duplicate Address Detection MUST take

                place on all unicast addresses, regardless of whether they are

                obtained through stateful, stateless or manual configuration, with

                the exception of the following cases: [...]




                The original RFC was updated/modernized by RFC 4429 and further on by RFC 7527



                EDIT
                To nitpick a bit: the correct sequence of RFCs is more precisely:



                RFC 1971, obsoleted by RFC 2462, obsoleted by RFC 4862, updated by RFC 7527







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 31 mins ago









                Doryx

                33




                33










                answered 8 hours ago









                Marc 'netztier' Luethi

                2,324316




                2,324316




















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