Re: RFC3484 destination address selection rule 2 is buggy

2008-03-31 Thread Fred Baker
On Mar 31, 2008, at 10:10 AM, Bob Hinden wrote: > Fred, > >>> I think I am in general agreement of the consequences, but it isn't >>> about scope, it is about reachability. Anytime there is a a >>> choice of >>> addresses to use, the same issue come to play. It's hard to know >>> about >>> r

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-31 Thread Bob Hinden
Fred, >> I think I am in general agreement of the consequences, but it isn't >> about scope, it is about reachability. Anytime there is a a choice >> of >> addresses to use, the same issue come to play. It's hard to know >> about >> reachability with out prior knowledge or trying it out and

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-30 Thread Brian E Carpenter
On 2008-03-29 16:01, Fred Baker wrote: > > On Mar 28, 2008, at 12:51 PM, Hemant Singh (shemant) wrote: > >> I think I am in general agreement of the consequences, but it isn't >> about scope, it is about reachability. Anytime there is a a choice of >> addresses to use, the same issue come to pla

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-28 Thread Fred Baker
On Mar 28, 2008, at 12:51 PM, Hemant Singh (shemant) wrote: > I think I am in general agreement of the consequences, but it isn't > about scope, it is about reachability. Anytime there is a a choice of > addresses to use, the same issue come to play. It's hard to know > about > reachability w

RE: RFC3484 destination address selection rule 2 is buggy

2008-03-28 Thread Hemant Singh (shemant)
; Brian E Carpenter; Pekka Savola Subject: Re: RFC3484 destination address selection rule 2 is buggy Fred, > > On Mar 19, 2008, at 4:56 PM, Brian E Carpenter wrote: > >>> - use a ULA source address if and only if the destination is a ULA >>> in the same prefix >> >

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-28 Thread Bob Hinden
Fred, > > On Mar 19, 2008, at 4:56 PM, Brian E Carpenter wrote: > >>> - use a ULA source address if and only if the destination is a ULA >>> in the same prefix >> >> I think that is broken. There's a reason ULAs are defined as global >> addresses. > > but they are *not* global addresses. If they

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-28 Thread Fred Baker
On Mar 19, 2008, at 4:56 PM, Brian E Carpenter wrote: >> - use a ULA source address if and only if the destination is a ULA >> in the same prefix > > I think that is broken. There's a reason ULAs are defined as global > addresses. but they are *not* global addresses. If they were, they would b

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-28 Thread Pekka Savola
On Thu, 27 Mar 2008, JINMEI Tatuya / wrote: >> The scenario where a router advertises the default route yet does not >> advertise any prefix information (or prefix information does not set >> the autoconfig bit) is still a valid scenario (e.g., I could imagine >> DHCPv6-only deployments using

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-27 Thread JINMEI Tatuya / 神明達哉
At Wed, 26 Mar 2008 07:49:42 +0200 (EET), Pekka Savola <[EMAIL PROTECTED]> wrote: > > v4:{site-local,global} is special and is not that harmful as long as > > the network is properly configured (I know we cannot always assume > > that, though). When a link-local address is the only available > >

RE: RFC3484 destination address selection rule 2 is buggy

2008-03-27 Thread Hemant Singh (shemant)
MEI Tatuya / Cc: Iljitsch van Beijnum; ipv6@ietf.org Subject: Re: RFC3484 destination address selection rule 2 is buggy On Tue, 25 Mar 2008, JINMEI Tatuya / wrote: > v4:{site-local,global} is special and is not that harmful as long as > the network is properly configured (I know we ca

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-25 Thread Pekka Savola
On Tue, 25 Mar 2008, JINMEI Tatuya / wrote: > v4:{site-local,global} is special and is not that harmful as long as > the network is properly configured (I know we cannot always assume > that, though). When a link-local address is the only available > address for host, there should normally be

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-25 Thread JINMEI Tatuya / 神明達哉
At Fri, 14 Mar 2008 00:27:26 +0200 (EET), Pekka Savola <[EMAIL PROTECTED]> wrote: > While the default router "persistence" is an interesting observation, the > more > interesting one is why the default address selection algorithm pick > source,destination pair of v6:{link-local,global} which is

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-19 Thread Brian E Carpenter
Fred, On 2008-03-19 01:33, Fred Baker wrote: > On Mar 18, 2008, at 5:10 AM, Gabi Nakibly wrote: ... > Similarly, there is no sense using a ULA source address unless the > destination is in the same ULA. If the destination is a global > address it might or might not be able to reply, but the s

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Sebastien Roy
Gabi Nakibly wrote: > I certainly agree that the benefit of the simplicity of this rule is > very desirable. However, this rule may be too restrictive. I am worried > that there might be cases where it is desirable to send a packet to a > (on-link) global address using a link-local address or UL

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Gabi Nakibly
t; To: Gabi Nakibly <[EMAIL PROTECTED]> Cc: Pekka Savola <[EMAIL PROTECTED]>; ipv6@ietf.org; Iljitsch van Beijnum <[EMAIL PROTECTED]> Sent: Tuesday, March 18, 2008 2:33:15 PM Subject: Re: RFC3484 destination address selection rule 2 is buggy On Mar 18, 2008, at 5:10 AM, Gabi Nakibly

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Sebastien Roy
Fred Baker wrote: > Speaking for myself, there is a simpler rule in that special case > that imght be instructive in the ULA case. > > There is no sense in using a link-local address as a source address > unless one is sending to someone on the same LAN. Hence, there is no > sense in suing a

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Fred Baker
On Mar 18, 2008, at 5:10 AM, Gabi Nakibly wrote: > Determining whether the destination address is in the zone of a > source address can be tricky. However, it is fairly easy in the > common case where the source address is link-local and the > destination address is global. If the latter is

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Sebastien Roy
Pekka Savola wrote: > Maybe the critical thing that has been missing in the RFC3484 > discussions has been "have vendors already fixed this? how? which > approach has worked and which not?" When we were working on http://tools.ietf.org/html/draft-ietf-v6ops-v6onbydefault-03, I prototyped the s

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-18 Thread Gabi Nakibly
Pekka, I agree that the scenario that was presented in http://tools.ietf.org/html/draft-ietf-v6ops-v6onbydefault-03 is very problematic. However, I do not think that the root of the problem is the destination address selection rule 2. As you mentioned, the source-destination pair v6:{link-local,

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-17 Thread Sebastien Roy
Francis Dupont wrote: > Perhaps some of us didn't remember but: > - I predicted the RFC 3484 will be always at least a phase back from > what we want. > - I predicted too it would take a not reasonable amount of time to > get the document published or updated. > Unfortunately both predictions

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-14 Thread Rémi Denis-Courmont
Le Friday 14 March 2008 00:44:11 Francis Dupont, vous avez écrit : > Perhaps some of us didn't remember but: > - I predicted the RFC 3484 will be always at least a phase back from > what we want. > - I predicted too it would take a not reasonable amount of time to > get the document published

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Mohacsi Janos
On Fri, 14 Mar 2008, Rémi Denis-Courmont wrote: Le Friday 14 March 2008 00:27:26 Pekka Savola, vous avez écrit : This issue was first reported about 5 years ago by Alain Durand et al and yet there is no fix yet (and no mention in the default address selection problem statement), see section

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Francis Dupont
In your previous mail you wrote: Francis, I don't think BCP status would change this; that's still a => I disagree: the procedure for BCPs is lighter and BTW there is nothing when you look at it which justifies a standard track (we should not promote it to a draft standard for instance :-).

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Pekka Savola
On Thu, 13 Mar 2008, Francis Dupont wrote: > Perhaps some of us didn't remember but: > - I predicted the RFC 3484 will be always at least a phase back from > what we want. > - I predicted too it would take a not reasonable amount of time to > get the document published or updated. > Unfortunately

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Rémi Denis-Courmont
Le Friday 14 March 2008 00:27:26 Pekka Savola, vous avez écrit : > This issue was first reported about 5 years ago by Alain Durand et al and > yet there is no fix yet (and no mention in the default address selection > problem statement), see section 2 of: > http://tools.ietf.org/html/draft-ietf-v6o

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Alain Durand
+1 On 3/13/08 6:44 PM, "Francis Dupont" <[EMAIL PROTECTED]> wrote: > Perhaps some of us didn't remember but: > - I predicted the RFC 3484 will be always at least a phase back from > what we want. > - I predicted too it would take a not reasonable amount of time to > get the document publis

Re: RFC3484 destination address selection rule 2 is buggy

2008-03-13 Thread Francis Dupont
Perhaps some of us didn't remember but: - I predicted the RFC 3484 will be always at least a phase back from what we want. - I predicted too it would take a not reasonable amount of time to get the document published or updated. Unfortunately both predictions were right so again I propose to