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Duplicate Address Detection
Node X is going to assign IP address A on its interface “I”
Interface “I” joins the multicast groups:
- FF02::1 (“all nodes”)
- FF02::1:FF00:0:A' (the solicited-node multicast address «all nodes with IP = A»)
Is there any NS queries? (dst ip = FF02::1:FF00:0:A, src ip = ::)
X sends NS query (dst ip = FF02::1:FF00:0:A, src ip = ::)
Is there any NA (flag S = 0) sent to address FF02::1?
In case of events 3 or 5 - the address isn't unique!
Else – the address is unique
Must be performed on all unicast addresses (except for anycast)