Re: [Roll] using the flow label instead of hop by hop
Michael Richardson <mcr+ietf@sandelman.ca> Thu, 25 October 2012 12:39 UTC
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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: roll@ietf.org
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Comments: In-reply-to "Adrian Farrel" <adrian@olddog.co.uk> message dated "Wed, 24 Oct 2012 18:45:54 +0100."
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Date: Thu, 25 Oct 2012 08:16:56 -0400
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Subject: Re: [Roll] using the flow label instead of hop by hop
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Adrian Farrel <adrian@olddog.co.uk> wrote: AF> I guess I need to look at this in more detail (it always helps to read the AF> draft) this still sounds exactly like label switching. It sure looks like it at first. However, labelled switching uses the label to get across a series of routers.. The label mostly denotes a specific path which the source has chosen. Labelled switching is therefore a form of source route (except that the source route is abstracted). The presence of this label in RPL does not pick a route, rather it picks one routing table among many. It is therefore more akin to the DSCP than the MPLS label, but even that's not correct. RPL is doing storing mode (LPM at each hop), or non-storing mode (source routing) at each hop regardless of the label. The label picks a DODAG. It's probably more relevant to storing mode where there is an evaluation (longest-prefix-match) at each hop, and when there are multiple DODAG, there are multiple fib. -- Michael Richardson -on the road-
- [Roll] using the flow label instead of hop by hop Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Abdussalam Baryun
- Re: [Roll] using the flow label instead of hop by… Owen Kirby
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Adrian Farrel
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… John E Drake
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… John E Drake
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Brian E Carpenter
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Ralph Droms
- Re: [Roll] using the flow label instead of hop by… Brian E Carpenter
- Re: [Roll] using the flow label instead of hop by… Ralph Droms
- Re: [Roll] using the flow label instead of hop by… Adrian Farrel
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Michael Richardson
- Re: [Roll] using the flow label instead of hop by… Michael Richardson
- Re: [Roll] using the flow label instead of hop by… Adrian Farrel
- Re: [Roll] using the flow label instead of hop by… John E Drake
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Brian E Carpenter
- Re: [Roll] using the flow label instead of hop by… Michael Richardson
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Carsten Bormann
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Philip Levis
- Re: [Roll] using the flow label instead of hop by… Pascal Thubert (pthubert)
- Re: [Roll] using the flow label instead of hop by… Philip Levis