On 07/12/10 07:27 AM, Zach Shelby wrote:
I made an example of a 6lowpan-nd bootstrapping exchange for an
802.15.4 device bootstrapping for the first time, generating a 16-bit
address, and then registering it in an unmanaged network. ZigBee IP
is trying to minimize the number of addresses each node has to
configure - the goal is to use just LL64 and GP16. LL64 is avoided
where possible though as it has 6 bytes of extra overhead per
address.
Below the suggested example uses GP16 for RS/RA and NS/NA exchanges
where possible. LL64 is used more for bootstrapping before the GP16
is confirmed. A couple questions come up here:
1. Can we make an exception for using global addresses for RS/RA and
NS/NA between the host and router? RFC4861 requires the use of
link-local. Using GP16 would save some complexity and overhead.
link-local is used for RS/RA, but not required for NS/NA.
Erik
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