Return-Path: X-Original-To: mpls@core3.amsl.com Delivered-To: mpls@core3.amsl.com Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 8C4803A6A86 for ; Wed, 4 Aug 2010 15:08:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.029 X-Spam-Level: X-Spam-Status: No, score=0.029 tagged_above=-999 required=5 tests=[AWL=-1.576, BAYES_00=-2.599, HTML_MESSAGE=0.001, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45] Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZBbe49TjjLPa for ; Wed, 4 Aug 2010 15:08:36 -0700 (PDT) Received: from imr3.ericy.com (imr3.ericy.com [198.24.6.13]) by core3.amsl.com (Postfix) with ESMTP id 9F7083A689F for ; Wed, 4 Aug 2010 15:08:36 -0700 (PDT) Received: from eusaamw0707.eamcs.ericsson.se ([147.117.20.32]) by imr3.ericy.com (8.13.8/8.13.8) with ESMTP id o74M8sK6026002 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Wed, 4 Aug 2010 17:09:05 -0500 Received: from EUSAACMS0703.eamcs.ericsson.se ([169.254.1.134]) by eusaamw0707.eamcs.ericsson.se ([147.117.20.32]) with mapi; Wed, 4 Aug 2010 18:08:57 -0400 From: Autumn Liu To: "liu.guoman@zte.com.cn" Date: Wed, 4 Aug 2010 18:08:55 -0400 Thread-Topic: [mpls] Updated drafts - draft-kini-mpls-ring-frr-facility-backup, draft-kini-mpls-fast-lsp-alert Thread-Index: Acsy6hFtw+kF6TFcQ9W+vmBMFZcp7wBNyXaw Message-ID: <60C093A41B5E45409A19D42CF7786DFD51AE694CFE@EUSAACMS0703.eamcs.ericsson.se> References: <60C093A41B5E45409A19D42CF7786DFD51AE592A5E@EUSAACMS0703.eamcs.ericsson.se> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_60C093A41B5E45409A19D42CF7786DFD51AE694CFEEUSAACMS0703e_" MIME-Version: 1.0 Cc: "mpls@ietf.org" Subject: Re: [mpls] Updated drafts - draft-kini-mpls-ring-frr-facility-backup, 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Hi Liu,
 
In your example, the bypass tunnel only protects= the=20 first primary LSP (L10-L9-L8-L7-L6). The proposed RRO object will be includ= ed=20 for this primary LSP only. As a result, the alert message will only trigger= this=20 primary to switch over to the e-backup.
 
Regards,
Autumn

From: liu.guoman@zte.com.cn=20 [mailto:liu.guoman@zte.com.cn]
Sent: Tuesday, August 03, 2010 12= :38=20 AM
To: Autumn Liu
Cc: Greg Mirsky; Julien Meuric;=20 mpls@ietf.org; mpls-bounces@ietf.org
Subject: Re: [mpls] Updated= =20 drafts - draft-kini-mpls-ring-frr-facility-backup,=20 draft-kini-mpls-fast-lsp-alert


hi,Autumn
here I only ask a question for this E-FRR=20 solution.
for example as the=20 following:
   +-------L1--------L2---------L3--------L4-------+
 = =20  |                   &nbs= p;=20                      = ;=20            |
 L10                 =  =20                      = ;=20          L5
  |=20                      = ;=20                      = ;=20          |
 +-------L9--------L8---------L7--------L6-------+ we suppose there are two working LSP , One LSP:=20 L10-L9-L8-L7-L6,
another LSP:=20 L10-L1-L2-L3-L4.
now if the failure = happened=20 between L8 and L7. according to your solution.
L8 and L7 would send fast alert message to each node of bypass=20 Tunnel
:=20 L8-L9-L10-L1-L2-L3-L4-L5-L6-L7;
when= node L10=20 received fast alert message from L8 or L7, for working LSP:
L10-L9-L8-L7-L6, will swich into e-backup tunnel:=20 L10-L1-L2-L3-L4-L5-L6;
while for ano= ther LSP:=20 L10-L1-L2-L3-L4 , how  do it know the failure don't
affect the working LSP and can't need to switch into = e-backup=20 tunnel?
whether there is include LSP= ID=20 information which will be affected by
the=20 failure in the fast alert message packet? or the solution will adapt= =20
new method to judge which LSP will be affec= ted by=20 the failure?

maybe my understand= ing be=20 wrong?

best regards
<= FONT=20 face=3DArial size=3D2>liu
            &nbs= p;  =20            






Autumn Liu=20 <autumn.liu@ericsson.com>
=B7=A2=BC=FE=C8=CB:  mpls-bounces@ietf.org=20

2010-07-28 06:35


=CA=D5=BC= =FE=C8=CB
Greg Mirsky=20 <gregimirsky@gmail.com>, Julien Meuric=20 <julien.meuric@orange-ftgroup.com>=20
=B3=AD=CB= =CD
"mpls@ietf.org"=20 <mpls@ietf.org>=20
=D6=F7=CC= =E2
Re: [mpls] Updated drafts &n= bsp;=20      -      =20  draft-kini-mpls-ring-frr-facility-backup,     &= nbsp;=20  draft-kini-mpls-fast-lsp-alert




Hi Greg and Julien
 =20
Thanks for pointing this out. = The draft=20 can be applied to the case when segment protection is utilized as defined i= n=20 4873. We will update the draft accordingly.
 
Regards= ,=20
Autumn
 
 

From: mpls-bounces@ietf.org=20 [mailto:mpls-bounces@ietf.org] On Behalf Of Greg Mirsky
Sent:<= /B>=20 Monday, July 26, 2010 1:37 PM
To: Autumn Liu
Cc:=20 mpls@ietf.org
Subject: Re: [mpls] Updated drafts -=20 draft-kini-mpls-ring-frr-facility-backup,=20 draft-kini-mpls-fast-lsp-alert

Dear Autumn,
thank you for adding specific case to our discussi= on. In=20 my view protecting segment L10-L1-L2-L3-= L4-L5=20 (e-backup tunnel) is shared by all backup tunnels that traverse the ring th= rough=20 nodes L10-L9-L8-L7-L6-L5. This e-backup tunnel is the e-backup tunnels for = all=20 working sections/segments (in case of link and node protection) of an LSP=20 L10-...-L8-..-L5. I'd re-state my question to authors whether they've consi= dered=20 re-using RSVP-TE objects and subobjects defined in RFC 4873.  If mecha= nisms=20 and objects defined in RFC 4873 not sufficient, why RFC 4873 not referenced= in=20 the draft Efficient Facility Backup FRR.

Regards,
Greg

On Mon, Jul = 26, 2010=20 at 12:16 PM, Autumn Liu <autumn.liu@ericsson.com> wrote= :=20
Hi Greg,
 =20
 +-------L1--------L2---------L3--------L4-------+
 |=  =20                      = ;=20                      = ;=20        |
 L= 10  =20                      = ;=20                      = ;=20    L5
  |   &nbs= p;  =20                      = ;=20                      = ;=20    |
 +-------L9--------L8---------L7--------L6-------+
  =  =20                      = ;=20  
Not all PLRs. Using the diagr= am in=20 draft as an example.
Bypass 1 (to pr= otect=20 link between L8 and L7) : L8-L9-L10-L1-L2-L3-L4-L5-L6-L7
Bypass 2 (to protect node failure on L8) :=20 L9-L10-L1-L2-L3-L4-L5-L6-L7
 
e-backup tunnel L10-L1-L2-L3-L4-L5 can be used instea= d for=20 both cases without getting traffic u-turned.
 
Regards,
= Autumn



From: Greg Mirsky [mailto:gregimirsky@gmail.com]=20
Sent: Monday, July 26, 2010 12:03 PM
To: Autumn=20 Liu
Cc: Julien Meuric; Sriganesh Kini; mpls@ietf.org

Subject: Re: [mpls] Updated drafts -=20 draft-kini-mpls-ring-frr-facility-backup, draft-kini-mpls-fast-lsp-alert=20

Dear Autumn,
I'm quite surprised to read your rep= ly to=20 Julien. My understanding of your proposal is that all PLRs share the same u= -PLR=20 for given ring segment of LSP. Please correct me if my understanding is=20 different from authors intention.
I'd like to add to Julien's comment th= at=20 RFC 4873 seems relevant to your solution as well as RFC 4872. And I'd ask t= he=20 same question as Julien in regard to not referencing RFC=20 4873.

Regards,
Greg

On Mon, Jul 26, = 2010 at=20 11:30 AM, Autumn Liu <autumn.liu@ericsson.com> wrote= :=20
Hi Julien,

draft-kini-mpls-ring-frr-facility-back= up=20 describes a mechanism to let the primary LSP be aware of what the bypass LS= P for=20 corresponding protected facility. If my understanding is correct, the=20 association mechanism defined in 4872 is used to associate the primary and= =20 backup LSPs. This is not good enough for the problem the draft is trying to= =20 address since each link/node along the primary LSP may have different bypas= s=20 LSPs.

Regards,
Autumn=20


-----Original Message-----
From: mpls-bounces@ietf.org [mailto:mpls-bounces@ietf.org] On Behalf = Of Julien=20 Meuric
Sent: Monday, July 26, 2010 10:40 AM
To: Sriganesh Kini
Cc:= =20 mpls@ietf.org
Subject: Re: [mp= ls]=20 Updated drafts - draft-kini-mpls-ring-frr-facility-backup,=20 draft-kini-mpls-fast-lsp-alert

Hi Sriganesh.

The mechanism=20 described in draft-kini-mpls-ring-frr-facility-backup
reminds me of end = to=20 end recovery (or more specifically end to end protection), as enabled by RF= C=20 4872. That is all the more similar because the association mechanism is alr= eady=20 defined in there, with a dedicated RSVP-TE object. RFC 4872 is Standard Tra= ck:=20 is there any rational for not considering=20 it?

Regards,

Julien


Le 26/07/2010 18:59, Sriganesh= Kini=20 a =A8=A6crit :
> FYI - These updated version of these drafts were pre= sented=20 today at
> IETF78.
> http://tools.ietf.org/html/draft-kini-mpls-ring-frr-facility-ba= ckup-01
> http://tools.ietf.org/html/draft-kini-mpls-fast-lsp-alert-01
> Thanks
>
> - Sri
>
>
>=20 _______________________________________________
> mpls mailing=20 list
> mpls@ietf.org
>= ; https://www.ietf.org/mailman/listinfo/mpls
>
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