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> It may cause some problem for DNA scheme to rely on MAC address as below. > > First, in certain technology such as 802.16, MAC address is not used > for data transfer. In some implementation, when a host performs > address resolution to find the router's MAC address, its device driver > intercepts the message and provides a bogus MAC address. So the device driver is spoofing a response to the Neighbor Solicitation? Won't this cause problems if and when SEND is implemented? > Moreover, when a host moves to another subnet/ link, it won't speed up > DNA procedure to check whether its existing default router is still > reachable. So the scheme will give little help when, IMO, fast DNA is > needed the most, i.e. when a host doesn't have a valid address, so > should get a new one ASAP. Since ND and RS/RA are done simultaneously in simple DNAv6, the completion time is determined by the faster of the two exchanges. In the case where the host doesn't have a valid address, the ND exchanges will fail (no response), and the host will obtain an address via the normal RS/RA procedure. |