This thread refers to "GP16" from a Zigbee Interop document, and I infer it's probably a global-scope IPv6 address derived from a 16-bit 802.15.4 short address, but how the derivation is done is not clear. The term does not appear in 6lowpan-nd except in a comment in -11 that refers to this thread; nor is it in RFC4944 or 6lowpan-hc-08.
If it's a Zigbee concept, could somebody translate it into IETF-speak, or at least suggest where those of us privileged to access the Zigbee Alliance docs might find the referenced interop report? Thanks. Peter On Sun, Jul 25, 2010 at 3:59 PM, Zach Shelby <[email protected]> wrote: > On Jul 19, 2010, at 4:54 PM, Robert Cragie wrote: > > > I'm still confused by this. Earlier, Zach said that in fact we should not > be using GP16 in the src IP address of the NS. I totally agree. > > Sorry, that was a temporary brain-short (which I corrected). In nd-10 the > NS src IP address must be the address being registered, and the SLLAO the > LLA corresponding to that address. In the case of ZigBee IP, that would be > the GP16 and the 16-bit MAC address. > > The main reason for using the address being registered as the NS src IP > address is related to security. We would like to preserve compatibility with > SeND for more general applicability of this mechanism in the future. > > I am not totally caught up on the 6lowpan and ZigBee IP mailing lists (just > came back from vacation yesterday), but to throw a few possible options out > here: > > a. Do things as in nd-10 and require more specialized code for this, this > was the conclusion the authors came when closing ticket #87. Most 6lowpan > implementations are specialized stacks anyways - is this really an issue? > > b. Move the address being registered to the ARO and add a flag (breaking > SeND compatibility). > > c. Allow use of the 64-bit MAC address in the SLLAO of the NS even when the > IP src address is a tentative GP16. This doesn't really solve the resolution > problem worrying Dario and Robert though. > > I will add a bullet point about this to the ND presentation for the WG > meeting tomorrow. > > Zach > > -- > Zach Shelby, Chief Nerd, Sensinode Ltd. > http://zachshelby.org - My blog "On the Internet of Things" > http://6lowpan.net - My book "6LoWPAN: The Wireless Embedded Internet" > Mobile: +358 40 7796297 > > _______________________________________________ > 6lowpan mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6lowpan >
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