IETF
lwig@jabber.ietf.org
Friday, 29 July 2011< ^ >
Room Configuration

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[13:08:18] <HUI> if there are more implementation, please input to the guidance documen
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[13:09:46] <HUI> agenda bashing
[13:10:20] <obergmann2> http://tools.ietf.org/html/draft-chakrabarti-nordmark-energy-aware-nd-00
[13:10:24] <HUI> Jari said that optimized neighbor discovery are working ongoing
[13:10:35] <obergmann2> thats the draft he was referring to^
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[13:23:24] <HUI> risk of collision of data path, forward the packet to the wrong route,
[13:23:42] <HUI> Olaf: COAP
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[13:29:15] <HUI> jari: sending and receiving fragmentation is different
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[13:30:34] <HUI> alex: is there any proxy for IP fragmentation?
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[13:30:38] <HUI> not necessarily
[13:31:43] <HUI> Jari: Non-IP, coap is IP protocol, can build proxy to HTTP and non-ip
[13:33:35] <cabo> You need to keep state from getting the request to having sent the response. There can't be a way around that.
[13:33:56] <cabo> Whether it is coded in a separate response or piggy-backed makes very little difference.
[13:35:29] <HUI> LWIG want to avodi fragmentation?
[13:35:35] <cabo> CoAP is designed to help avoid IP fragmentation. See the message size rules.
[13:35:45] <ShoichiSakane> +1 cabo
[13:35:47] <HUI> thanks , go ahead
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[13:36:19] <angelo.castellani> cabo: a question about the route-over fragments implementation trick. aren't you worried about datagram_tag collisions?
[13:36:36] <cabo> No. If you are, you are worried about reassembly in general.
[13:36:47] <cabo> The immediate forwarding does not change anything here that I know.
[13:38:04] <angelo.castellani> not so sure, as long as you can pair datagram_tag with original source you have a strong guarantee that there will be no collisions. on later hops you can't pair with source address anymore.. this introduces a lot more uncertainty
[13:38:58] <cabo> The forwarder has to allocate a new datagram_tag. Yes, this could be added to the text.
[13:39:35] <cabo> (The text describes what is different between the optimization and the basic behavior. So it doesn't say that.)
[13:39:59] <cabo> slide is hidden
[13:40:01] <angelo.castellani> this introduces new problems as well, because if you are load-balancing across multiple routes this will not work
[13:40:22] <angelo.castellani> maybe we can discuss it on the list
[13:40:33] <HUI> please post to the list
[13:40:38] <angelo.castellani> ok
[13:40:53] <cabo> Again, the optimization works better here than the unoptimized version.
[13:41:04] <cabo> But maybe you should talk more about your load-balancing setup.
[13:41:16] <angelo.castellani> ok
[13:43:16] <cabo> Message-IDs
[13:43:28] <HUI> cary: coap use re-tran mechanism, it is up to server to retransmit, or client?
[13:43:56] <cabo> MIC: This is solved by the mEssage-ID.
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[13:44:44] <HUI> uniform interface for coap and http?
[13:44:55] <cabo> Is anyone listening to the Jabber stream?
[13:45:16] <cabo> Can you take my comment to the microfone?
[13:45:18] <cabo> Hello?
[13:45:33] <cabo> Thanks!
[13:45:36] <angelo.castellani> i relayed the message to the mic :)
[13:45:39] <cabo> (10 sec delay, obviously...)
[13:46:10] <HUI> dan and jari will read this section of the document
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[13:53:08] <HUI> security protocol
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[14:09:06] <HUI> Jari's sleep node implementation
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[14:26:33] <nx> who's speaking?
[14:27:02] <obergmann2> Kerry Lynn
[14:27:07] <nx> before kerry?
[14:27:20] <obergmann2> Michael
[14:27:24] <obergmann2> sry
[14:27:46] <nx> thanks
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[15:10:45] <obergmann2> in case you wonder: we have skipped some slides are are on #16
[15:11:06] <obergmann2> #18
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[15:11:36] <obergmann2> sry #19
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[15:11:58] <cabo> http://wiki.tools.ietf.org/group/wgchairs/wiki/MeetingAV — number all slides
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[15:16:20] <mycom> done
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