Re: [Mpls-interop] MPLS-TP OAM requirements - Lock and notification of lock
Huub van Helvoort <hhelvoort@chello.nl> Sun, 03 May 2009 22:57 UTC
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Date: Mon, 04 May 2009 00:59:03 +0200
From: Huub van Helvoort <hhelvoort@chello.nl>
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To: Martin Vigoureux <martin.vigoureux@alcatel-lucent.com>
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Subject: Re: [Mpls-interop] MPLS-TP OAM requirements - Lock and notification of lock
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Bonsoir Martin, You wrote: > here are my thoughts on this: > > As far as I understand, strictly speaking the Lock function > does not make sense on a unidir LSP. Indeed locking is performed > at the source point and so there is no need to send any message > to perform that Lock. (the potentially needed message is to inform > the end-point(s) of the status but that is lock notification. > I'll come back to this). What should happen if the CP and MP are separated, i.e the ingress point and egress poinr belong to different SP domains? > Therefore Lock is only needed on a bidir entity and what is exactly > needed is the capability to request the other end point to admin lock > its direction. What do you mean by "its direction", the direction from "the other end point" back to the "source point"? > Coming back to the notification, I believe the following requirement > is needed: > The MPLS-TP OAM toolset MUST provide a functionality to enable an > End Point of a PW, LSP or Section to inform the End Point(s) of that > LSP, PW, or Section that the PW, LSP or Section has been > administratively shutdown at this End Point. > But it is conditionally needed. This function is *only* needed if > locking is achieved via Lock, otherwise if it is achieved via NMS > commands This requires that both end points can be reached via the MP. > we (I hope) can safely assume that: > for undir LSP there will be commands at both ends, one saying lock, the > other saying you are notified of other end locking. > for bidir LSP there will be commands at both ends, both saying lock and > you are notified of other end locking. > > The MUST is needed because the egress must be aware of the Lock because > we expect him to then inform client MEPs that are "downstream". (see > question at the end of this e-mail). > > The small problem I have is that this function is a notification > one but really tightly linked to the Lock. In other words, I do > not know where this reqs better fits (especially wrt to the conditional > issue): in Lock or in Lock Notification? > Opinions are welcomed. > > Therefore I propose: > > 2.2.x. Lock > The MPLS-TP OAM toolset SHOULD provide a functionality to enable an > End Point of a bidirectional PW, LSP or Section to request to its > associated End Point that it administratively shuts down the direction > of the PW, LSP or Section for which it is the head-end. > > This function SHOULD be performed on-demand. > > This function SHOULD be performed between the End Points of a PW, LSP > or Section. > > Note that administratively shutting down corresponds to stopping user > traffic being sent on the PW, LSP or Section. > > > 2.2.y. Lock Notification > The MPLS-TP OAM toolset MUST provide a function to enable End Points > of a (server) LSP or Section to notify, of its administrative locking > status, the End Points of (client) PWs or LSPs affected by this status. > > This function SHOULD be performed on-demand. > > This function SHOULD be performed between the End Points of a PW, LSP > or Section. > -comment: > this needs to be rephrased as the notifying end points may not be > the same nodes than the notified end points. > The general case is in fact a notification between end points of > different e.g., LSPs while the sentence seems to say that it is between > the end-points of the same e.g., LSP. > Any suggestion welcomed. Snip -- I will answer the next in a separate email-- Regards, Huub. -- ================================================================ Always remember that you are unique...just like everyone else...
- [Mpls-interop] MPLS-TP OAM requirements - Lock an… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Adrian Farrel
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Sprecher, Nurit (NSN - IL/Hod HaSharon)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Sprecher, Nurit (NSN - IL/Hod HaSharon)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Sprecher, Nurit (NSN - IL/Hod HaSharon)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Sprecher, Nurit (NSN - IL/Hod HaSharon)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Lam, Hing-Kam (Kam)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Annamaria Fulignoli
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Adrian Farrel
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Huub van Helvoort
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Annamaria Fulignoli
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Lam, Hing-Kam (Kam)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Martin Vigoureux
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Adrian Farrel
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Lam, Hing-Kam (Kam)
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Malcolm Betts
- Re: [Mpls-interop] MPLS-TP OAM requirements - Loc… Lam, Hing-Kam (Kam)