Re: [Mpls-interop] MPLS-TP OAM requirements - Lockandnotificationof lock
Huub van Helvoort <hhelvoort@chello.nl> Tue, 05 May 2009 10:09 UTC
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Date: Tue, 05 May 2009 12:10:42 +0200
From: Huub van Helvoort <hhelvoort@chello.nl>
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To: Annamaria Fulignoli <annamaria.fulignoli@ericsson.com>
References: <0BDFFF51DC89434FA33F8B37FCE363D516FDAE56@zcarhxm2.corp.nortel.com> <42D4A33F1EAE420289ED4EFCA24D19BB@your029b8cecfe><49FDE0C4.7060807@alcatel-lucent.com><49FE241F.5080007@chello.nl><077E41CFFD002C4CAB7DFA4386A53264A754E0@DEMUEXC014.nsn-intra.net><49FE98B2.5080801@chello.nl><077E41CFFD002C4CAB7DFA4386A53264A755C1@DEMUEXC014.nsn-intra.net><0BDFFF51DC89434FA33F8B37FCE363D516FDB24D@zcarhxm2.corp.nortel.com> <A37753B7B7A3134F9366EE6B4052F43B02C8D3AA@ILEXC2U03.ndc.lucent.com> <93DFCD4B101EB440B5B72997456C5F9403ACC0BB@esealmw118.eemea.ericsson.se>
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Cc: mpls-interop@ietf.org
Subject: Re: [Mpls-interop] MPLS-TP OAM requirements - Lockandnotificationof lock
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Ciao Annamaria, You wrote: > Besides, as many mails were sent on this issue, I'd like to check with > all of us where we are with Lock (2.2.x) and Lock Notification(2.2.y) > requirements. > > I know we are dealing with requirements and not with solutions, but > please let's consider the following example: > > topology is A <---> B <---> C <---> D > > LSP1 goes A-B-C-D [hvh] so the LSP1 MEPs are located in LSR A and LSR D > - The operator decides to set in A LSP1 administratevly down , due for > example to an out of service test on the path. > > The Lock requirement (2.2.x ) requires that A is able to set its peer > MEP D in administratevly lock state. As Lam reported , we are using the > "LOCKED" state and "Lock" event of the X.731 Administrative state model. > This implies that when LSP1 in D enters in the administrative lock > state, all traffic on the path MUST be blocked; but MEP D must notify > the clients , otherwise alarms will be raised against the supported > client services because of the unexpected interruption; i.e. D should > send Lock Notification(2.2.y) to its own clients. [hvh] agree > - In case of bidirectional path even in MEP A the LSP1 (rx direction ) > enters in administrative lock state and even MEP A should notify the > client(s) transported by the path ( i.e. In the backward direction; req. > 2.2.y) [hvh] OK > - My understanding is that the client to which the Lock Notification is > sent are always MEPs as MIP are transparent to Lock and Lock Notification [hvh] yes indeed > - When a MEP receives a Lock Notification it can in turn notify its > MPLS-TP client MEPs or map it into an equivalent signal for whatever > client layer is then being carried. [hvh] correct > - Lock Notification functionality (req 2.2.y ) applies to all scenarios > where server enters the "locked" state ; for instance if a port in LSR B > is set administratevly down (" Lock" event of the X.731 Administrative > state model) LSR B, as Server MEP of paths transimitted and received on > the port , should generate Lock Notification on all these paths, for > example towards D and A , MEPs of LSP1. [hvh] note that LSR B does not have a MEP on LSP1. The scenario you describe only works if e.g. between LSR B and LSR C there is a tunnel (LSP2) carrying LSP1 and LSR B and C have MEPs on LSP2. Now locking MEP on LSP2 in B will cconsequently cause that (lock) notifications will inserted in the MEPs of LSP2 to notify the MEPs in LSP1 (its client). > Are we all agree on these ? [hvh] if you agree on the last comment... Cheers, 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)