Dear All,
I have two nodes with the following MAC Addresses
MAC Address Node1: 0A:AA:1C:36:48:01
MAC Address Node2: 0B:BB: 1B:36:48:01
Based upon the address autoconf process, the following tentative link-local
address will be formed:
Tentative Link-local Address Node1: FE80::0AAA:FF1C:FE36:4801 / 64Tentative
Link-local Address Node2: FE80::0BBB: FF1B: FE36:4801 / 64
And the following Solicited Node Multicast addresses
Solicited Node Multicast Address 1: FF02::1:FF36:4801/104
Solicited Node Multicast Address 2: FF02::1:FF36:4801/102
>From above it is seen that although the Link-local address formed by the two
>nodes is different, but they have the same solicited node multicast address.
Now, for DAD, when an NS (with unspecified source address and Solicited Node
Multicast Address as destination address) is received by node 2 (because of the
same solicited node multicast address), the receiving node will know that the
target address in duplicate, wherein from the above the Tentative 1 (Carried as
Target Address) and tentative 2 are distinct and they are NOT duplicate, but
according to RFC 2462 these addresses will be considered duplicate. WHY ?
Also Section 5.4.3 para 1 RFC 2462 states that a node MUST NOT respond to a
Neighbor Solicitation for a tentative address, whereas i read somewhere that
for DAD, if a node does not receive an NA in response to NS within RetransTimer
seconds, the address is unique, in other words for DAD an NA is necessary.
What am i missing, or what am i doing wrong?
Zarrar
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