Hello, > I don't think anything is technically broken if we leave > Section 6 of RFC 4944 as is.
True, as people almost always know their PAN-ID. We were seeing it as a question & interoperability problem though - some people used 0x0000 here, some people used a PAN-ID here. And Zach mentions some people using 0xFFFF. > My suggestion would be to create a new section that updates > Section 6 of RFC 4944 and point the text to that section. Works for me! I don't have strong feelings about if it should be PAN-ID or 0x0000 or anything else, but again I think it's critical one is picked (ideally adding to hc-06 before WGLC). 0x0000 has the advantage of being easy, and avoids any possible U/L problems. If you use PAN-ID, there will always be two PAN-IDs mapping to the same IP address (as the U/L bit is cleared). Using the PAN-ID has the advantage that we are not actually changing anything about RFC4944, just optimizing out a conditional statement that always evaluates to false. Regards, -Colin -----Original Message----- From: Zach Shelby [mailto:[email protected]] Sent: March 5, 2010 5:53 PM To: Richard Kelsey Cc: Colin O'Flynn; [email protected] Subject: Re: [6lowpan] 6lowpan 16-bit PAN-ID Field On Mar 5, 2010, at 16:39 , Richard Kelsey wrote: > In a lowpan With only a single PAN ID it makes much more > sense to use zeros and avoid problems if the PAN ID has to > change. +1. Or it can also be 0xFFFF (broadcast) which then allows a 16-bit MAC address of 0. This is what most people are doing in practice from what I've seen. Wouldn't hurt to have a recommendation like that in HC... Zach -- http://www.sensinode.com http://zachshelby.org - My blog "On the Internet of Things" http://6lowpan.net - New book - "6LoWPAN: The Wireless Embedded Internet" Mobile: +358 40 7796297 Zach Shelby Head of Research Sensinode Ltd. Kidekuja 2 88610 Vuokatti, FINLAND This e-mail and all attached material are confidential and may contain legally privileged information. If you are not the intended recipient, please contact the sender and delete the e-mail from your system without producing, distributing or retaining copies thereof. _______________________________________________ 6lowpan mailing list [email protected] https://www.ietf.org/mailman/listinfo/6lowpan
