The Source Address of Router Solicitation Message is specified in section
4.1 as follows:
IP Fields:
Source Address
An IP address assigned to the sending interface, or
the unspecified address if no address is assigned
to the sending interface.
My question is, why not specify whether the Source Address is link-local
address or other type when it is not the unspecified address?And when to
use which type?Or it must be link-local address as the one of the Router
Advertisement Message?
The same problem occurs in the same field of Neighbor Solicitation
Message,Neighbor Advertisement Message.
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