Re: RFC 6164 to be listed as updating RFC 4291

2013-02-11 Thread Rémi Després
, RD Regards Brian On 11/02/2013 10:13, Rémi Després wrote: Hi, Bob, Ole, RFC 6164 (/127 on inter-router links) is in fact an update of RFC4291 (IPv6 addressing architecture). Yet, it isn't listed as such in https://tools.ietf.org/html/rfc4291. Shouldn't this be fixed? Regards

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-09 Thread Rémi Després
Hi, Usman, Thank you for this opportunity to clarify once more an important point. 2013-02-09 03:16, Usman Latif osma...@yahoo.com : Hi Remi, A few months ago, I raised some concerns around RFC 6164 which permitted use of /127 prefixes on inter-router p2p links. You mention use of u/g

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-08 Thread Rémi Després
2013-02-07 19:35, Roger Jørgensen rog...@gmail.com : sorry, but we can't all be nice all the time, see more inline, On Thu, Feb 7, 2013 at 7:21 PM, Rémi Després despres.r...@laposte.net wrote: snip (b) The benefit comes from the following, i.e. one of the 4rd objectives: - We want

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-08 Thread Rémi Després
2013-02-08 à 10:51, sth...@nethelp.no : ... You just ASSUME something I think we all understand is not possible to guaranty. There will be collision, deal with it. Let me make the point again. It is a fact (not an assumption) that RFC4291-conforming IIDs either have u=0, in which case

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-08 Thread Rémi Després
Le 2013-02-08 à 11:59, Havard Eidnes h...@uninett.no a écrit : However, there is nothing which enforces RFC4291-conforming IIDs for (for instance) statically configured IPv6-addresses. So in what way do well defined u/g values for RFC4291-conforming IIDs help you? 1. Users that manually

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-08 Thread Rémi Després
Le 2013-02-08 à 12:08, Roland Bless roland.bl...@kit.edu a écrit : Hi, On 08.02.2013 09:31, Rémi Després wrote: Hosts of an IPv6 customer site can have IPv6 addresses assigned, with SLAAC or DHCPv6, BEFORE 4rd is activated. If these addresses become in conflict with the CE 4rd

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
Le 2013-02-06 à 22:12, Roland Bless roland.bl...@kit.edu a écrit : ... Nothing new needs to be done in any implementation other than that of a 4rd-supporting devices (4rd CEs and BRs). In case that they are not using 4rd, MUST they exclude this IID range? Because of RFC 4291 is as it

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
2013-02-06 17:28, Ole Troan o...@cisco.com : Fernando, ... with Remi's proposal, a duplicate address will not even be detected. Correct: even if software is available to detect collisions between 4rd addresses and RFC 4291-compatible host addresses, it won't detect any. (Such software,

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
2013-02-07 14:41, Ole Troan o...@cisco.com : Remi, ... with Remi's proposal, a duplicate address will not even be detected. Correct: even if software is available to detect collisions between 4rd addresses and RFC 4291-compatible host addresses, it won't detect any. (Such software,

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
2013-02-07 15:04, Ole Troan o...@cisco.com : I think our understanding of the IPv6 addressing architecture is incompatible. there are no unused subset or unused ranges of interface-ids in IPv6. 1. If you interpret RFC 4291 as already permitting to set u=1 in some IIDs other than derived

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
2013-02-07 16:34, Ray Hunter v6...@globis.net : Ole Troan wrote: Remi, ... I think our understanding of the IPv6 addressing architecture is incompatible. there are no unused subset or unused ranges of interface-ids in IPv6. cheers, Ole FWIW I agree with Ole. An IID currently only

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-07 Thread Rémi Després
Le 2013-02-07 à 17:55, Doug Barton do...@dougbarton.us a écrit : On 02/07/2013 06:01 AM, Rémi Després wrote: Besides, these remaining concerns are aside from the question asked by Softwire Rémi, Do you admit to the possibility that the design coming from softwire might have flaws

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-07 Thread Rémi Després
Le 2013-02-07 à 18:02, Doug Barton do...@dougbarton.us a écrit : Rémi, I think you've misunderstood me. Please see below. On 02/06/2013 02:01 AM, Rémi Després wrote: ... Fair enough. My answer is that no software that I know makes determination based on the u bit. Thanks

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-06 Thread Rémi Després
2013-02-06 00:45, Doug Barton do...@dougbarton.us : On 02/05/2013 05:57 AM, Rémi Després wrote: Hi, Doug, Please see inline. 2013-02-04 à 18:37, Doug Barton do...@dougbarton.us : On 02/04/2013 12:38 AM, Rémi Després wrote: It remains that IIDs having u=1 SHOULD be unique, i.e

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-06 Thread Rémi Després
Bob, This is, in my understanding, what should be avoided in 6man, a debate on new 4rd modifications: - The 4rd design has been stabilized for long in Softwire. - The question to 6man is ONLY whether the proposed reserved range is compatible with the IPv6 addressing architecture. Thanks, RD

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-06 Thread Rémi Després
2013-02-06 à 13:07, Bless, Roland (TM) roland.bl...@kit.edu : Dear Rémi, Am 06.02.2013 11:13, schrieb Rémi Després: This is, in my understanding, what should be avoided in 6man, a debate on new 4rd modifications: - The 4rd design has been stabilized for long in Softwire. - The question

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-06 Thread Rémi Després
Le 2013-02-06 à 17:16, Fernando Gont ferna...@gont.com.ar a écrit : On 02/06/2013 10:52 AM, Rémi Després wrote: - The reserved range is a tool to AVOID conflicts. It isn't, like DAD, a tool to RESOLVE them when they occur. DAD *detects* them, but does not resolve them (for instance

Re: Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-06 Thread Rémi Després
2013-02-06 17:41, Bless, Roland (TM) roland.bl...@kit.edu : Hi, Am 06.02.2013 14:52, schrieb Rémi Després: As already said, the 4rd range only makes a first use of an existing RFC4291 provision: The use of the universal/local bit in the Modified EUI-64 format identifier is to allow

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-05 Thread Rémi Després
Hi, Doug, Please see inline. 2013-02-04 à 18:37, Doug Barton do...@dougbarton.us : On 02/04/2013 12:38 AM, Rémi Després wrote: It remains that IIDs having u=1 SHOULD be unique, i.e. with rare enough exceptions. This is somewhat similar to the expectation that ULA collisions shouldn't

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-05 Thread Rémi Després
Le 2013-02-05 à 15:01, sth...@nethelp.no a écrit : With these specifications, it is impossible on a SLAAC link that two hosts that have universal-scope addresses (necessarily different if they communicate at the MAC layer), would have conflicting IIDs at the IP layer if they derive them

Keeping the 4rd-range issue separate from the general u/g discussion

2013-02-05 Thread Rémi Després
Bob, It seems the general discussion on u/g-bits clarification is going to be long. Fortunately it also appears, for instance in the following, that compatibility of the 4rd IID-range with the IPv6 addressing architecture doesn't depend on this work being completed. 2013-02-05 15:36, Brian

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-05 Thread Rémi Després
. (Despite my understanding that the point I had made below isn't contradictory with (a) and (b) above, I see no point in arguing more about it.) Thanks, RD Le 2013-02-05 à 15:36, Brian E Carpenter brian.e.carpen...@gmail.com a écrit : On 05/02/2013 14:11, Rémi Després wrote: Le 2013-02-05 à 15:01

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
Brian, Bob, 2013-02-03 12:43, Brian E Carpenter brian.e.carpen...@gmail.com : On 03/02/2013 10:57, Rémi Després wrote: Le 2013-02-02 à 18:17, Joel M. Halpern j...@joelhalpern.com a écrit : I a not clear what aspect of the semantics of u==1 and the relationship to EUI-64 is a dead duck

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
2013-02-03 à 20:39, Joel M. Halpern j...@joelhalpern.com : On 2/3/2013 2:36 PM, Brian E Carpenter wrote: On 03/02/2013 17:26, Joel M. Halpern wrote: To a significant degree Randy, I agree with you in your comment about magic bits. If I were designing IPv6 from scratch (counter-factual

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
Hi, Roger, Please see inline. 2013-02-03 22:40, Roger Jørgensen rog...@gmail.com : On Sun, Feb 3, 2013 at 9:56 PM, joel jaeggli joe...@bogus.com wrote: On 2/3/13 11:39 AM, Joel M. Halpern wrote: On 2/3/2013 2:36 PM, Brian E Carpenter wrote: On 03/02/2013 17:26, Joel M. Halpern wrote: To

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
Randy, We have in common, as you know, the objective of IPv6 promotion, and that of NATs elimination as much as possible. In this respect, changing now the IPv6 specification for hosts that configure IIDs having u=1, although no serious need has been identified, and this specification has

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
2013-02-04 10:41, Fernando Gont fg...@si6networks.com : On 02/04/2013 06:11 AM, Rémi Després wrote: It depends on what is done with the new design, especially if it is backward compatible and optional. The question that started this discussion is whether reserving a currently unused

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
Le 2013-02-04 à 10:54, Fernando Gont fg...@si6networks.com a écrit : On 02/04/2013 05:38 AM, Rémi Després wrote: (*) It remains that IIDs having u=1 SHOULD be unique, i.e. with rare enough exceptions. This is somewhat similar to the expectation that ULA collisions shouldn't be seen

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
2013-02-04 11:37, Fernando Gont fg...@si6networks.com : On 02/04/2013 06:56 AM, Rémi Després wrote: I believe that the original question really was whether it makes sense to reserve an unused IID range for 4rd. A 4rd reserved range, for 4rd activation to never require IPv6 renumbering

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-04 Thread Rémi Després
Le 2013-02-04 à 11:32, Fernando Gont fg...@si6networks.com a écrit : On 02/04/2013 06:42 AM, Rémi Després wrote: In this respect, changing now the IPv6 specification for hosts that configure IIDs having u=1, although no serious need has been identified, and this specification has ben used

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-02 Thread Rémi Després
Brian, I agree that this is a good time to clarify uses of u and g bits, and support the initiative Sheng and yourself has taken. Comments and suggestions inline. 2013-02-01 21:13, Fernando Gont fg...@si6networks.com : Hi, Brian Sheng, On 02/01/2013 05:13 AM, Brian E Carpenter wrote:

Re: 4rd IID range IPv6 addressing architecture

2013-02-02 Thread Rémi Després
2013-02-01 21:57, RJ Atkinson rja.li...@gmail.com : On 01 Feb 2013, at 10:30 , Rémi Després wrote: Each of the designs we are interested in depends, to be complete, on reservation of a subset of the IID space left unused by RFC4291 (that having u=g=1). Both are *experiments*. Neither

Re: 4rd IID range IPv6 addressing architecture

2013-02-02 Thread Rémi Després
Le 2013-02-02 à 16:02, Fernando Gont fg...@si6networks.com a écrit : On 02/02/2013 07:40 AM, Rémi Després wrote: Both are *experiments*. Neither is a standard. With respect to Softwire, they decided to standardise something other than 4rd. Had they decided to standardise 4rd, my views

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-02 Thread Rémi Després
2013-02-02 12:46, Brian E Carpenter brian.e.carpen...@gmail.com : ... IMHO The only combination that has operational value for the purpose of mapping IPv6 address to MAC today is: u==1 g==0 (concatenated with unicast IPv6/64 prefix[2000::/3] || link local address [fe80::/10]) SLAAC

Re: [Fwd: I-D Action: draft-carpenter-6man-ug-00.txt]

2013-02-02 Thread Rémi Després
Le 2013-02-02 à 14:45, Ray Hunter v6...@globis.net a écrit : ... In any case, and more important in my understanding, this doesn't change that any IID having u=1 can never conflict with IEEE-derived IIDs, be they duplicated or not. A clarification on this would IMHO be useful. I have a

Re: 4rd IID range IPv6 addressing architecture

2013-02-01 Thread Rémi Després
for ILNP, and since 4rd only needs only 1/2^14 of this space, I rather see convergence than conflict. Hoping we can agree on it, Regards, RD A few secondary comments inline. 2013-02-01 14:54, RJ Atkinson rja.li...@gmail.com : On 31 Jan 2013, at 13:11 , Rémi Després wrote: What ensures 4rd

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
2013-01-30 16:59, Ray Hunter v6...@globis.net : ... my 2 cents. If 4rd is truly experimental then indeed I think it's up to the operators deploying it to ensure they choose a unique IID range within the scope of where they are operating 4rd (between tunnel endpoints and the tunnel

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
2013-01-31 11:26, Ray Hunter v6...@globis.net : GangChen mailto:phdg...@gmail.com ... Just some comments from operational views. I guess it's true operators could avoid confliction with u=1 g=1 in near future. However, I believe that is relative short-term guarantee with the condition of

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
Ray, Thanks for the acknowledgements of point that are now understood. More clarification inline on others. 2013-01-31 12:32, Ray Hunter v6...@globis.net : Rémi Després wrote: 2013-01-30 16:59, Ray Hunter v6...@globis.net : ... my 2 cents. If 4rd is truly experimental then indeed I

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
2013-01-31 11:42, Ole Troan otr...@employees.org : agree with what Ray says. that gives a path forward for 4rd without requiring us to settle the interface-id structure question. Do you mean by this that 4rd will work perfectly well _without_ this reservation? - If not, please clarify

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
2013-01-31 16:35, Ray Hunter v6...@globis.net: Rémi Després mailto:despres.r...@laposte.net 31 January 2013 15:44 2013-01-31 11:42, Ole Troan otr...@employees.org : agree with what Ray says. that gives a path forward for 4rd without requiring us to settle the interface-id structure

Re: 4rd IID range IPv6 addressing architecture

2013-01-31 Thread Rémi Després
Ran, Oops! I must really apologize for having given a wrong reason why 4rd doesn't conflict with ILNP as specified by RFCs. (I didn't check yesterday what I had understood, some time ago, after reading some of the ILNP RFCs, and definitely mischaracterized the reason). What ensures 4rd

Re: 4rd IID range IPv6 addressing architecture

2013-01-30 Thread Rémi Després
2013-01-29 18:28, Ole Troan otr...@employees.org : ... I still think we need to answer the question Brian raised. should the interface-id have any encoded meaning? That will not be done overnight. I've been thinking about it and have some ideas about how to write a discussion draft, but

Re: 4rd IID range IPv6 addressing architecture

2013-01-30 Thread Rémi Després
Le 2013-01-30 à 14:34, Ole Troan otr...@employees.org a écrit : Remi, I still think we need to answer the question Brian raised. should the interface-id have any encoded meaning? That will not be done overnight. I've been thinking about it and have some ideas about how to write a

4rd IID range IPv6 addressing architecture

2013-01-21 Thread Rémi Després
Hi, Bob, The discussion on whether the proposed 4rd IID range is compatible with the IPv6 addressing architecture has apparently come to a standstill. Yet an answer of 6man to Softwire is expected. A. To help making a WG decision, here are key points that, in my understanding, emerged from the

Re: IIDs, u and g bits, and 4rd

2012-12-23 Thread Rémi Després
may be constructed by turning on the Group bit, and unicast identifiers constructed by leaving the Group bit zero. Hope this helps, It does (IMHO). Thanks for this reference. Regards, RD RayH Quoting Rémi Després despres.r...@laposte.net: Ray, Please see inline. 2012-12-21 à

Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-22 Thread Rémi Després
Roger, Please se inline. 2012-12-2122:12, Roger Jørgensen rog...@gmail.com : On Fri, Dec 21, 2012 at 2:57 PM, Rémi Després despres.r...@laposte.net wrote: 2012-12-2110:49, Ole Troan otr...@employees.org : ... (*) 4rd implementors are free to add code to reject any intra-site IID

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
2012-12-20 19:34, Fred Baker (fred) f...@cisco.com : On Dec 20, 2012, at 9:35 AM, Rémi Després wrote: The comment Brian is making refers to IP's requirements, which are that the IID used in a subnet by an interface must be unique within that subnet. This is a clear requirement, on which

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
2012-12-20 20:29, Ole Troan otr...@employees.org : Remi, [...] To make assertions about IP addresses based on the EUI-64 is to impose requirements that don't actually exist in IP. It's a little like saying that concrete MUST (are required to) be grey because the rocks we use in it

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
Jouni, At this point, it appears that just adding one IID range reservation to those of RFC5453 (to be registered by IANA), can do the job. No need to change any existing RFC. Besides, as suggested by Brian, a different IID range than that of the current 4rd draft can be recommended by 6man.

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
Le 2012-12-21 à 10:37, Ole Troan otr...@employees.org a écrit : ... This isn't a reason, however, to abandon rules that proved to be useful. AFAIK, the rule that IIDs having u=1 must (so far) only be based on global IEEE EUI-64 addresses is one of these useful rule not to be abandoned.

Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-21 Thread Rémi Després
Hi, Simon, Thanks a lot for this pointer. I will check, hopefully with Brian, which 4rd range can best fit in this up-to-date table. RD Le 2012-12-21 à 11:56, Simon Perreault simon.perrea...@viagenie.ca a écrit : Le 2012-12-20 11:07, Rémi Després a écrit : - Small problem: at http

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
Ray, Please see inline. 2012-12-21 à 14:03, Ray Hunter v6...@globis.net : ... The basic question is whether reserving for 4rd a specific 8-bit IID is compatible with the IPv6 addressing architecture as currently specified. Besides some expressed FUD, which isn't illegitimate in face of

Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-21 Thread Rémi Després
2012-12-2110:49, Ole Troan otr...@employees.org : ... (*) 4rd implementors are free to add code to reject any intra-site IID that (by mistake) would be universal-scope, and in the 4rd-assigned IID range. but the current specification does not handle conflicts? There is no relation

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
2012-12-21 12:00, Ole Troan otr...@employees.org : Remi, there appears to be quite a lot of pushback in 6man against the use of u/g bits as specified in the 4rd draft. FUD, yes, but technically founded pushback that haven't been answered, no one left AFAIK. I can't parse the

Which IID range for 4rd - was Use the IANA registry of RFC5453 for 4rd

2012-12-21 Thread Rémi Després
, IANA can be required to add this range to its table of www.iana.org/assignments/ipv6-interface-ids/ipv6-interface-ids.xml (Thanks to Simon for having found where it is). Regards, RD 2012-12-21 11:56, Simon Perreault simon.perrea...@viagenie.ca : Le 2012-12-20 11:07, Rémi Després

Re: IIDs, u and g bits, and 4rd

2012-12-21 Thread Rémi Després
2012-12-20 à 16:50, Bless, Roland (TM) roland.bl...@kit.edu : Hi Rémi, On 20.12.2012 09:54, Rémi Després wrote: Interface addresses at the link layer are specified by IEEE to be universally unique. This has been effective fort link-layer communication to need neither manual configuration

Re: IANA policy (was Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd))

2012-12-21 Thread Rémi Després
that are understood to not disrupt any implementation that complies with existing RFCs. Regards, RD Thanks Suresh On 12/20/2012 05:07 AM, Rémi Després wrote: Hello, chairs, - First a great thank you Jouni for for the reference to RFC 5453, which is perfectly relevant but had been ignored

Re: IIDs, u and g bits, and 4rd

2012-12-20 Thread Rémi Després
2012-12-19 23:01, Roger Jørgensen rog...@gmail.com : ... if you read RFC4291 and section 2.5.1. you'll see the following two paragraphs IPv6 nodes are not required to validate that interface identifiers created with modified EUI-64 tokens with the u bit set to universal are unique.

Re: IIDs, u and g bits, and 4rd

2012-12-20 Thread Rémi Després
2012-12-19 21:27, Bless, Roland (TM) roland.bl...@kit.edu : Hi Rémi, On 19.12.2012 18:59, Rémi Després wrote: As is, the sentence misses that IIDs that have u=1 are expected to be universally unique. (This uniqueness is key to ensure that, as long I don't agree. From an IPv6

Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-20 Thread Rémi Després
Hello, chairs, - First a great thank you Jouni for for the reference to RFC 5453, which is perfectly relevant but had been ignored in this discussion. The good news is that, since an IANA registry for IID ranges has already been created, no new registry is needed for any new IID type, and in

Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-20 Thread Rémi Després
, is there any reason not to choose (for example) FDFE:::-FDFE::: which is near the existing anycast range ? No objection that I can see. Support for including this in the 6man answer. Thanks, RD Regards Brian On 20/12/2012 10:07, Rémi Després wrote: Hello

Re: Use the IANA registry of RFC5453 for 4rd (was IIDs, u and g bits, and 4rd)

2012-12-20 Thread Rémi Després
2012-12-20 13:46, Ole Troan otr...@employees.org: Also, is there any reason not to choose (for example) FDFE:::-FDFE::: which is near the existing anycast range ? No objection that I can see. Support for including this in the 6man answer. I think this is better

Re: IIDs, u and g bits, and 4rd

2012-12-20 Thread Rémi Després
Fred, Please see inline. 2012-12-20 à 17:32, Fred Baker (fred) f...@cisco.com : On Dec 20, 2012, at 12:54 AM, Rémi Després wrote: Interface addresses at the link layer are specified by IEEE to be universally unique. Yes, and EIU-64 is one of several seeds from which an IID can

Re: IIDs, u and g bits, and 4rd

2012-12-19 Thread Rémi Després
Hello, Ray, 2012-12-19 09:57, Ray Hunter v6...@globis.net : ... It seems to me with the benefit of hindsight that a fundamentally better approach would have been to reserve many more bits in the IID, or in RA PIO, to create mutually exclusive subspaces per assignment mechanism or per class of

Re: IIDs, u and g bits, and 4rd

2012-12-19 Thread Rémi Després
Ole, Roland, Could we limit the 6man discussion to the question asked by Softwire, i.e. whether new IID types can be defined, using u=g=1, with a first one for 4rd, is compatible with the current IPv6 specification? If the answer is positive (as it seems it can be), restarting a discussion on

Re: IIDs, u and g bits, and 4rd

2012-12-19 Thread Rémi Després
2012-12-19 16:58, Brian E Carpenter brian.e.carpen...@gmail.com : On 19/12/2012 14:44, Bless, Roland (TM) wrote: Hi, On 19.12.2012 14:21, Rémi Després wrote: Could we limit the 6man discussion to the question asked by Softwire, i.e. whether new IID types can be defined, using u=g=1

Re: Mail from softwire working group about 4rd

2012-12-14 Thread Rémi Després
2012-12-13 21:05, RJ Atkinson rja.li...@gmail.com : On 13 Dec 2012, at 10:46 , Rémi Després wrote: Reverse mapping, whose use I still don't see, cannot work the privacy option of RFC 4941 It still works fine, because the scope bit is set to local scope for the RFC-4941 uses (RFC-4941

Re: u/g in general [was Mail from softwire working group about 4rd

2012-12-13 Thread Rémi Després
2012-12-12 18:26, Ran Atkinson ran.atkin...@gmail.com : On 12 Dec 2012, at 12:21 , Rémi Després wrote: Do you know any deployment with u=g=1 in this context ? There is limited use today of IPv6 addresses that have apparent unicast routing prefixes, but contain multicast group IDs

Re: Mail from softwire working group about 4rd

2012-12-13 Thread Rémi Després
2012-12-12 18:38, RJ Atkinson rja.li...@gmail.com : On 12 Dec 2012, at 12:14 , Rémi Després wrote: In any case, IIDs for multicast addresses are out of scope for the IPv6 addressing architecture of RFC 4291. Disagree. It is clear that RFC-4291 has reserved the use of G==U==1

Re: Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
, Bob On Dec 11, 2012, at 6:35 AM, Rémi Després wrote: Hi Brian, Thank you for the quick comments on this issue. Let me explain more below. 2012-12-11 11:55, Brian E Carpenter brian.e.carpen...@gmail.com: Hi Suresh, The 4rd draft (http://tools.ietf.org/html/draft-ietf-softwire

Re: Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
Hi, Jouni, 2012-12-12 10:04, Jouni Korhonen jouni.nos...@gmail.com : Hi, On Dec 8, 2012, at 2:14 AM, Suresh Krishnan suresh.krish...@ericsson.com wrote: Hi all, The 4rd draft (http://tools.ietf.org/html/draft-ietf-softwire-4rd-04) describes a solution for providing IPv4

Re: u/g in general [was Mail from softwire working group about 4rd]

2012-12-12 Thread Rémi Després
2012-12-12 12:45, Brian E Carpenter brian.e.carpen...@gmail.com : I think the only way to make progress on this question is to discuss two points in a much more general way: 1. Does the current mapping of the u bit in the modified EUI format have any value? 2. Does the current mapping

Re: Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
Le 2012-12-12 à 17:12, Jouni Korhonen jouni.nos...@gmail.com a écrit : Remi, On Dec 12, 2012, at 3:29 PM, Rémi Després despres.r...@laposte.net wrote: Hi, Jouni, 2012-12-12 10:04, Jouni Korhonen jouni.nos...@gmail.com : Hi, On Dec 8, 2012, at 2:14 AM, Suresh Krishnan

Re: Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
Le 2012-12-12 à 17:18, Roger Jørgensen rog...@gmail.com a écrit : On Sat, Dec 8, 2012 at 1:14 AM, Suresh Krishnan suresh.krish...@ericsson.com wrote: Hi all, The 4rd draft (http://tools.ietf.org/html/draft-ietf-softwire-4rd-04) describes a solution for providing IPv4 connectivity over

Re: Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
2012-12-12 17:06, RJ Atkinson rja.li...@gmail.com : All, I fully agree with Brian Carpenter's note of Tuesday, December 11th at 10:55:05 +. I support his perspective as expressed in that note. I have read, but am NOT persuaded by, the responses from Remi Despres to Brian's notes.

Re: u/g in general [was Mail from softwire working group about 4rd

2012-12-12 Thread Rémi Després
Le 2012-12-12 à 17:23, Ran Atkinson ran.atkin...@gmail.com a écrit : On Weds 12th December, Remi Despres wrote, in part: Not sure however that the two proposed questions are clear enough because today: - some IIDs have u = 0, and some have u = 1, - some IIDs have g = 0, and some have g =

Re: Mail from softwire working group about 4rd

2012-12-11 Thread Rémi Després
Hi Brian, Thank you for the quick comments on this issue. Let me explain more below. 2012-12-11 11:55, Brian E Carpenter brian.e.carpen...@gmail.com: Hi Suresh, The 4rd draft (http://tools.ietf.org/html/draft-ietf-softwire-4rd-04) describes a solution for providing IPv4 connectivity over

Re: 6MAN WG Call for adoption draft-gont-6man-oversized-header-chain-02

2012-06-14 Thread Rémi Després
Le 2012-06-13 à 20:46, Dave Hart a écrit : I am in favor of adopting draft-gont-6man-oversized-header-chain-02 as a 6MAN WG document. +1 RD Dave Hart IETF IPv6 working group mailing list ipv6@ietf.org Administrative

Re: 6MAN WG [second] Last Call: draft-ietf-6man-uri-zoneid-01.txt

2012-06-14 Thread Rémi Després
Le 2012-06-13 à 20:53, Dave Hart a écrit : I support advancing draft-ietf-6man-uri-zoneid-01 as a PS. +1 RD Dave Hart IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests:

Re: Atomic fragments: converging on something?

2012-01-09 Thread Rémi Després
Le 2012-01-06 à 07:48, Fernando Gont a écrit : Hi, Rémi, On 01/05/2012 02:02 PM, Rémi Després wrote: Hi Fernando, Full agreement on the substance of your draft, and support for an RFC based on it. However, I believe it should rather be a BCP than a Standard-track RFC. (I don't see

Re: Atomic fragments: converging on something?

2012-01-05 Thread Rémi Després
Hi Fernando, Full agreement on the substance of your draft, and support for an RFC based on it. However, I believe it should rather be a BCP than a Standard-track RFC. (I don't see any need to standardize anything beyond what already exists.) Regards, RD Le 2012-01-04 à 20:36, Fernando Gont

Re: PMTUD and MTU 1280

2011-07-26 Thread Rémi Després
Le 25 juil. 2011 à 20:50, Dan Wing a écrit : -Original Message- From: Rémi Després [mailto:despres.r...@laposte.net] Sent: Monday, July 25, 2011 1:43 PM To: Dan Wing Cc: 'james woodyatt'; 'RJ Atkinson'; ipv6@ietf.org Subject: Re: PMTUD and MTU 1280 Dan, 1. The point I

Re: PMTUD and MTU 1280

2011-07-25 Thread Rémi Després
Dan, 1. The point I wanted to check is just, slightly reformulated): May a simple IPv6 host have no support of packet-reassembly, and simply accept packets up to 1280 octets. In my understanding, the answer should be yes. - This doesn't depend on whether sources know or not whether their

Re: draft-gont-6man-managing-privacy-extensions-00.txt

2011-03-16 Thread Rémi Després
Le 16 mars 2011 à 07:30, Christian Huitema a écrit : ... In fact, rather than your draft proposing to not use privacy addresses, we should pursue the deprecation of using EUI-64 in addresses. -1 The worst part of your draft is that , if we published it, it would give the impression that

draft-ietf-6man-exthdr-01 - Support for adoption

2011-01-17 Thread Rémi Després
Le 15 janv. 2011 à 23:59, Hing-Kam (Kam) Lam a écrit : If the firewall will just dig one layer deeper and then discard anyway, what is the point? It wouldnt in all the cases - not when the Hdr type is 00. If the draft is adopted, the more precise situation becomes: - NEITHER that all FW's

Re: I-D Action:draft-ietf-6man-exthdr-01.txt

2011-01-06 Thread Rémi Després
Le 5 janv. 2011 à 13:44, Joel M. Halpern a écrit : ... I consider (a), specifying the format at least to the level of requiring TLV encoding, to be a good idea. +1 IETF IPv6 working group mailing list ipv6@ietf.org

Re: I-D Action:draft-ietf-6man-exthdr-01.txt

2011-01-06 Thread Rémi Després
Le 5 janv. 2011 à 21:15, Brian E Carpenter a écrit : On 2011-01-06 02:15, RJ Atkinson wrote: ... Prohibiting new IPv6 Extension Headers outright, ... My reaction is that this is going too far, +1 ... So I am more inclined to a SHOULD NOT approach; I think I'm agreeing with a somewhat

Re: I-D Action:draft-krishnan-6man-header-reserved-bits-00.txt

2010-10-28 Thread Rémi Després
Le 28 oct. 2010 à 07:18, Suresh Krishnan a écrit : ... I doubt that any new use of the flow label will be backward compatible. Do you have any text about this proposal that I can read up on? In my understanding: - draft-carpenter-flow-ecmp-03 details a promising particular use of 20-bit

Re: I-D Action:draft-krishnan-6man-header-reserved-bits-00.txt

2010-10-28 Thread Rémi Després
Le 28 oct. 2010 à 18:01, Suresh Krishnan a écrit : ... The proposals need consenting hosts on both ends to be useful, don't they? They don't! (Load balancing is a one-way function. If a host sets FLs, its flows to all destinations can be load balanced with ecmp, independently of what other

Re: I-D Action:draft-krishnan-6man-header-reserved-bits-00.txt

2010-10-27 Thread Rémi Després
Le 27 oct. 2010 à 06:26, Suresh Krishnan a écrit : Hi Remi, On 10-10-26 12:24 PM, Rémi Després wrote: Hi, Suresh, Le 25 oct. 2010 à 19:57, Suresh Krishnan a écrit : ... I strongly support the load-balancing use of the flow label. Isn't it better, then, to quickly improve what we have

Re: I-D Action:draft-krishnan-6man-header-reserved-bits-00.txt

2010-10-26 Thread Rémi Després
Hi, Suresh, Le 25 oct. 2010 à 19:57, Suresh Krishnan a écrit : ... I strongly support the load-balancing use of the flow label. Isn't it better, then, to quickly improve what we have for this, than inventing new uses that would prevent backward compatibility? The question is how many bits

Re: I-D Action:draft-krishnan-6man-header-reserved-bits-00.txt

2010-10-24 Thread Rémi Després
Le 23 oct. 2010 à 16:09, Randy Bush a écrit : 1. I do think that the justification in the draft for such a major change, after 12 years work based on RFC 2460, is weak. how much do you want for hacking on an unused field, another glorious pile of second system syndrome, for which dozens of

Re: Call for Adoption:draft-kohno-ipv6-prefixlen-p2p-03.txt

2010-10-11 Thread Rémi Després
Support. RD Le 9 oct. 2010 à 18:39, Brian Haberman a écrit : All, I am starting a one week consensus call on adopting: Title : Using 127-bit IPv6 Prefixes on Inter-Router Links Author(s) : M. Kohno, et al. Filename : draft-kohno-ipv6-prefixlen-p2p-03.txt Pages

Re: Question for Flow Label

2010-10-01 Thread Rémi Després
Le 1 oct. 2010 à 02:00, Brian E Carpenter a écrit : On 2010-09-30 20:01, Rémi Després wrote: ... Our question is: Is this usage compatible to RFC 3697? We posted this question to Softwires and we were told to also ask 6man for input. With RFC 3697 as is, it doesn't seem to be compatible

Re: Question for Flow Label

2010-10-01 Thread Rémi Després
Le 1 oct. 2010 à 21:35, Brian E Carpenter a écrit : On 2010-10-01 20:29, Rémi Després wrote: Le 1 oct. 2010 à 02:00, Brian E Carpenter a écrit : On 2010-09-30 20:01, Rémi Després wrote: ... Our question is: Is this usage compatible to RFC 3697? We posted this question to Softwires and we

Re: Question for Flow Label

2010-09-30 Thread Rémi Després
Hi Yiu, Response below, with an added direct copy to Brian. Le 25 sept. 2010 à 04:14, Yiu L. Lee a écrit : Hi gents, We have a design question of Flow Label. During the v6 transition, some DSL providers may want to create an IPv4-in-IPv6 tunnel from the BRAS to the AFTR to continue to

Re: Review of draft-krishnan-ipv6-exthdr-08

2010-09-29 Thread Rémi Després
Hi, Le 28 sept. 2010 à 16:52, Hing-Kam (Kam) Lam a écrit : ... My concern with the current format is that it does not help in incrementally introducing new v6 extension headers. I would like to add the following to the list of problems that GIEH currently solves: *) Some Hdr Options

Re: DHCPv6 vs ND strikes again (was: New version available)

2010-09-22 Thread Rémi Després
Le 22 sept. 2010 à 03:06, Christian Huitema a écrit : no one is arguing nd/ra be removed entirely, as subnet anycast should be. the argument is that there are environments where it is not needed and dhcp should be able to be used in its place. That's reasonable. There are cases where

Re: DHCPv6 vs ND strikes again (was: New version available)

2010-09-22 Thread Rémi Després
Le 22 sept. 2010 à 11:24, Mikael Abrahamsson a écrit : On Wed, 22 Sep 2010, Rémi Després wrote: Of course, if MS and Apple announce an upgrade of all their IPv6 stacks, to the effect that they use DHCPv6 requests to obtain what they no longer get in RAs, that would mitigate the need

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