The question is still whether we need to perform DAD. This was the
result of the WG meeting today, and we concluded to take a look at
that more closely and also discuss with 6man. The conclusion we had
today was that there are cases where DAD is not needed and cases where
it is.
You can of course use DHCPv6 in a LoWPAN, you always could. We should
not mix up DHCP and DAD though.
Zach
On Nov 10, 2009, at 16:13 , JP Vasseur wrote:
On Nov 10, 2009, at 2:57 AM, Jonathan Hui wrote:
On Nov 9, 2009, at 5:50 PM, Carsten Bormann wrote:
Again, entirely getting rid of a function is always the best
optimization.
Can we do that for DAD?
The *need* for DAD is the core question for me. As specified
within 6lowpan-nd now, IPv6 addresses are maintained using a
centralized protocol. That protocol looks and smells like DHCP -
there's request/response, lease times, relays. The whiteboard may
also administratively assign addresses. So in the end, it's not
clear to me why we would need to *detect* duplicates when we
essentially *avoid* them from the beginning.
I've voiced my comment several times over the past 1+ years and
presented a draft that argues for the use of optimized DHCP in
Dublin, so this is not new from my end. The fact that the current
6lowpan-nd document has evolved towards using DHCP-like mechanisms
is not an accident. But if what we do is DHCP-like, it would seem
to make sense to utilize existing DHCP infrastructure rather than
defining something new.
This is frustrating, I was about to write the exact same email. I
cannot agree more.
Why can't we use and potentially extended DHCP for that purpose ?
thanks.
JP.
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Jonathan Hui
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Zach Shelby
Head of Research
Sensinode Ltd.
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88610 Vuokatti, FINLAND
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