Thank you Renan, well I think it cannot be helped. However, there is still a question of why there are sets and sequences. When do sFlow exporters will export AS path data as a set (unordered) and when do they export these data as a sequence (ordered). There must be a reason for the existence of both type of sets, right? Actually, I would be ok with only sequences since they gave me the order of the next ASs to come.
Gregory ----- Original Message ----- From: Renan M Alves <renanmal...@gmail.com> Date: Thursday, January 15, 2009 7:28 am Subject: Re: [sFlow] AS sets and sequences > Gregory, > > sorry but administrator can't force anything. > sFlow will show what it see in the packet, without any treatment. > May be you can use some tool to do that but I don't know one. > > > > On Wed, Jan 14, 2009 at 5:42 PM, <greg...@is.naist.jp> wrote: > > > Renan, > > > > thank you for your diligence. > > Well, I do understand how the AS path is built but, sorry for the > long> sentences I made in the previous mail, I just wanted to know > if sFlow had a > > say in whether to represent this AS path as a set (unordered) or > as a > > sequence (ordered). In the latter case, it may possible for the > sFlow> administrator to force the representation of this AS path. > > Isn't it? > > > > Gregory > > > > ----- Original Message ----- > > From: Renan M Alves <renanmal...@gmail.com> > > Date: Thursday, January 15, 2009 4:29 am > > Subject: Re: [sFlow] AS sets and sequences > > > > > Gragory, > > > > > > the order of ASs in a AS path is totaly determined by the routing > > > protocol,commonly BGP, and represent the best path between two > > > points (ASs). > > > Sflow can't do anything about this, it just show what BGP decide. > > > > > > > > > > > > > > > On Wed, Jan 14, 2009 at 3:29 PM, <greg...@is.naist.jp> wrote: > > > > > > > Hello, > > > > > > > > I may have missed something in the RFC, but I was not able to > > > determine why > > > > the destination AS path can sometimes be represented as a set > > > (unordered set > > > > of ASs) or sometimes as a sequence (ordered set of ASs). Is it > > > bound to the > > > > proximity of the destination? For example, in a case where the > > > packet is > > > > sampled far from its destination and there are still many ASs to > > > cross, not > > > > ordering the ASs in the destination AS path may save processing > > > time (?). > > > > Or is there a totally different reason to this distinction? > > > > Moreover, is it possible to force the AS path to be either > one or > > > the other > > > > in some sampling device implementations, especially routers? I > > > can not > > > > recall anywhere to configure the way the AS path is exported on > > > the devices > > > > I use. So I was wondering if it was automatically determined > by an > > > > algorithm. > > > > > > > > Well, my reasoning is way too long. Sorry. > > > > > > > > Thanks for the answer, > > > > > > > > Gregory.
