On 8/11/11 7:16 AM, Damien Roth wrote:
Hello,
I'm a 2nd year PhD student and I'm trying to understand how 6LoWPAN
works and there is some points I still don't understand.
During the neighbor discovery process, a host sends a Neighbor
Solicitation message with an ARO and a Source Link-Layer Address
option. Why is the SLLA option mandatory, since the EUI-64 is already
contained in the Address Registration option ?
The EUI-64 is an identifier, which uniquely identifies the host whether
or not the host is using a 64 bit or 16 bit link-layer address.
The SLLA contains the address to which the host wants the router to send
packets i.e., a locator.
This leads to my second question : in the figure 5 (detailed message
address examples), why does the host use its short MAC address in the
SLLAO rather than its 64 bits MAC address ?
So that the packets the router forward to the host will be delivered
with the short addresses in the link-layer header.
Erik
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