From nobody Mon Jan 4 10:33:23 2021 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 89CB33A0F2E; Mon, 4 Jan 2021 10:33:21 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: IETF Meeting Session Request Tool To: Cc: bfd-chairs@ietf.org, martin.vigoureux@nokia.com, rrahman@cisco.com, rtg-bfd@ietf.org Subject: bfd - New Meeting Session Request for IETF 110 X-Test-IDTracker: no X-IETF-IDTracker: 7.24.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <160978520148.16625.11298816168068793594@ietfa.amsl.com> Date: Mon, 04 Jan 2021 10:33:21 -0800 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jan 2021 18:33:22 -0000 A new meeting session request has just been submitted by Reshad Rahman, a Chair of the bfd working group. --------------------------------------------------------- Working Group Name: Bidirectional Forwarding Detection Area Name: Routing Area Session Requester: Reshad Rahman Number of Sessions: 1 Length of Session(s): 1 Hour Number of Attendees: 25 Conflicts to Avoid: Chair Conflict: idr grow rtgwg bess netmod netconf Technology Overlap: bier spring mpls teas pals sfc Key Participant Conflict: ccamp People who must be present: Jeffrey Haas Reshad Rahman Martin Vigoureux Resources Requested: Special Requests: --------------------------------------------------------- From nobody Thu Jan 14 01:58:52 2021 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 6AB9E3A154B; Thu, 14 Jan 2021 01:58:47 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-stability-07.txt X-Test-IDTracker: no X-IETF-IDTracker: 7.24.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: rtg-bfd@ietf.org Message-ID: <161061832739.21019.10438931885642877282@ietfa.amsl.com> Date: Thu, 14 Jan 2021 01:58:47 -0800 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jan 2021 09:58:48 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : BFD Stability Authors : Ashesh Mishra Mahesh Jethanandani Ankur Saxena Santosh Pallagatti Mach Chen Peng Fan Filename : draft-ietf-bfd-stability-07.txt Pages : 6 Date : 2021-01-14 Abstract: This document describes extensions to the Bidirectional Forwarding Detection (BFD) protocol to measure BFD stability. Specifically, it describes a mechanism for detection of BFD packet loss. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-stability-07 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability-07 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-stability-07 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Thu Jan 14 05:35:29 2021 Return-Path: X-Original-To: rtg-bfd@ietfa.amsl.com Delivered-To: rtg-bfd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B2ED03A0981 for ; Thu, 14 Jan 2021 02:01:06 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.696 X-Spam-Level: X-Spam-Status: No, score=-0.696 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_COMMENT_SAVED_URL=1.391, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tkhCvefhwb0O for ; Thu, 14 Jan 2021 02:01:04 -0800 (PST) Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9B1CC3A149B for ; Thu, 14 Jan 2021 02:01:03 -0800 (PST) Received: by mail-ed1-x52c.google.com with SMTP id dj23so2470132edb.13 for ; Thu, 14 Jan 2021 02:01:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=U/tuUkzzN+cz0fLhEmAUdOr5ztzT02HXTLFgV7Y1hWk=; b=nhW79cUyTZblsvaWNouNIoXPpsIybWTnHEUu0Jigj4dZgAtEiDav/0gw4KFplPb8yy VQXGaIWyIGjezo/g9AnqBJMzOzVg0QOc5K8WdB0m2J6qz/COijMohkkaSWoQgUKRWM57 lz1oTJbuTBQzi8Mj3KSWZYS3J0JUTSvMr4TvbquIfJmQHM1rVoXv4tHW7YxOwi4E63VS /O1w2In7SMkH+DrFG1WbwIKhyZGu5l/wQmzwCnmTBOx+F3wJdAWCJ8cpSlc9dYJymuma 89IZS24Bsl6SdzP3RG2Qgd3z+CNKaAydhdR10+i4FXQQ8CNW/2bVSOqxm7DMlbV9K30B T9Bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=U/tuUkzzN+cz0fLhEmAUdOr5ztzT02HXTLFgV7Y1hWk=; b=o43/dILER2hFbd7z60pVadPXeVI4Rzl/tk3JbN+ZZpIa1sB+jlOsQWyPjutiEF8/YR xctxi0V1lY80KWjEqIFibIyPXnMCrN/S4wQKtGX8FkHEyTpt7GV+pCWs7Cz/quLGtC8s Ofi6TCX/ZKvOymVM+ik/Mk8LDKr9zuw1iG+C8tE2CUMjGnKdcwQ9l9Nh1ifh0heO6SzP 71YiUS/MHt8TG85zMHaK7IDBdDwcPazNeatnlAlCQ930TpOG5Pi/w1oss/uhiJrfXPpQ O2IaZg5UQM9cbIJHykT16mfFSeUHLezAxV6fg0OuckccrdJwNzfETvAyI+Qu4oNCQfPa 8jVw== X-Gm-Message-State: AOAM533uWJc6jy6xMh9u4HXhV2bV/htiXemAviNUUivc3qPdxaES0e5I McyjxAbA1cjAx0GmUyUuKmjXzUXF38o153ptneykiVN0mik= X-Google-Smtp-Source: ABdhPJx1YszaTu7KTQNpgrPdHbmS00kjNX4Olit27nHjKBtiE/wHV/wsZ8sVeOi99/v4O9v3PshVYLn9VP26KZFJN9M= X-Received: by 2002:aa7:dac5:: with SMTP id x5mr5256038eds.198.1610618461725; Thu, 14 Jan 2021 02:01:01 -0800 (PST) MIME-Version: 1.0 References: <161061832764.21019.1994746468167370229@ietfa.amsl.com> In-Reply-To: <161061832764.21019.1994746468167370229@ietfa.amsl.com> From: Santosh P K Date: Thu, 14 Jan 2021 15:30:50 +0530 Message-ID: Subject: Fwd: New Version Notification for draft-ietf-bfd-stability-07.txt To: rtg-bfd WG Content-Type: multipart/mixed; boundary="00000000000047d70f05b8d95513" Archived-At: X-Mailman-Approved-At: Thu, 14 Jan 2021 05:35:27 -0800 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jan 2021 10:01:07 -0000 --00000000000047d70f05b8d95513 Content-Type: multipart/alternative; boundary="00000000000047d70d05b8d95511" --00000000000047d70d05b8d95511 Content-Type: text/plain; charset="UTF-8" I have refreshed stability draft. Diff from the previous version is attached. ---------- Forwarded message --------- From: Date: Thu, Jan 14, 2021 at 3:28 PM Subject: New Version Notification for draft-ietf-bfd-stability-07.txt To: Ankur Saxena , Ashesh Mishra < mishra.ashesh@gmail.com>, Mach Chen , Mahesh Jethanandani , Peng Fan , Santosh Pallagatti A new version of I-D, draft-ietf-bfd-stability-07.txt has been successfully submitted by Santosh Pallagatti and posted to the IETF repository. Name: draft-ietf-bfd-stability Revision: 07 Title: BFD Stability Document date: 2021-01-14 Group: bfd Pages: 6 URL: https://www.ietf.org/archive/id/draft-ietf-bfd-stability-07.txt Status: https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ Htmlized: https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability Htmlized: https://tools.ietf.org/html/draft-ietf-bfd-stability-07 Diff: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-stability-07 Abstract: This document describes extensions to the Bidirectional Forwarding Detection (BFD) protocol to measure BFD stability. Specifically, it describes a mechanism for detection of BFD packet loss. Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat --00000000000047d70d05b8d95511 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I have refreshed stability=C2=A0draft. Diff from the previ= ous version is attached.=C2=A0

---------- Forwarded message ---------
Fro= m: <inter= net-drafts@ietf.org>
Date: Thu, Jan 14, 2021 at 3:28 PMSubject: New Version Notification for draft-ietf-bfd-stability-07.txt
T= o: Ankur Saxena <ankurpsaxena@= gmail.com>, Ashesh Mishra <mishra.ashesh@gmail.com>, Mach Chen <mach.chen@huawei.com>, Mahesh Jethanandani <mjethanandani@gmail.com>, Pen= g Fan <fanp08@gmail.com>, San= tosh Pallagatti <santosh= .pallagatti@gmail.com>



A new version of I-D, draft-ietf-bfd-stability-07.txt
has been successfully submitted by Santosh Pallagatti and posted to the
IETF repository.

Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-bfd-stability
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A007
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD Stability
Document date:=C2=A0 2021-01-14
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 bfd
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/archive/id/draft-ietf-bfd-stability-07.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0h= ttps://datatracker.ietf.org/doc/draft-ietf-bfd-stability/
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0ht= tps://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://t= ools.ietf.org/html/draft-ietf-bfd-stability-07
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-stability-07

Abstract:
=C2=A0 =C2=A0This document describes extensions to the Bidirectional Forwar= ding
=C2=A0 =C2=A0Detection (BFD) protocol to measure BFD stability.=C2=A0 Speci= fically, it
=C2=A0 =C2=A0describes a mechanism for detection of BFD packet loss.




Please note that it may take a couple of minutes from the time of submissio= n
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat


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+y2jZ2rJequri2GIO0Vcg8N7a/fsFWKN7PEoarE8YrPXPLbGoddPPVpHVRXGCIRG5qRCIvdXSa+ld7PrfLZcxY3HwXWlHuYowH9nLQyX01U= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR07MB6868 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Jan 2021 12:54:51 -0000 sorry, auto-completion issue with BFD WG alias. please see my original request below. -------- Message transféré -------- Sujet : Quick review of draft-ietf-bess-mvpn-fast-failover-15 Date : Mon, 25 Jan 2021 13:52:34 +0100 De : Martin Vigoureux Pour : idr@ietf.org , bfd@ietf.org Copie à : bess-chairs@ietf.org Hi, as part of IESG review Alvaro had suggested that both bfd and idr WGs get the chance to take a specific look at this document. So, could you please review it and comment on it if needed, ideally before Feb 2nd. https://datatracker.ietf.org/doc/draft-ietf-bess-mvpn-fast-failover/ Thank you -m From nobody Thu Jan 28 11:49:53 2021 Return-Path: X-Original-To: rtg-bfd@ietf.org Delivered-To: rtg-bfd@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 2F1473A16BC; Thu, 28 Jan 2021 11:49:47 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: Cc: rtg-bfd@ietf.org Subject: I-D Action: draft-ietf-bfd-optimizing-authentication-12.txt X-Test-IDTracker: no X-IETF-IDTracker: 7.24.0 Auto-Submitted: auto-generated Precedence: bulk Reply-To: rtg-bfd@ietf.org Message-ID: <161186338708.1841.2592673749004722225@ietfa.amsl.com> Date: Thu, 28 Jan 2021 11:49:47 -0800 Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Jan 2021 19:49:47 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Bidirectional Forwarding Detection WG of the IETF. Title : Optimizing BFD Authentication Authors : Mahesh Jethanandani Ashesh Mishra Ankur Saxena Manav Bhatia Filename : draft-ietf-bfd-optimizing-authentication-12.txt Pages : 8 Date : 2021-01-28 Abstract: This document describes an optimization to BFD Authentication as described in Section 6.7 of BFD RFC 5880. This document updates RFC 5880. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-bfd-optimizing-authentication/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-bfd-optimizing-authentication-12 https://datatracker.ietf.org/doc/html/draft-ietf-bfd-optimizing-authentication-12 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-bfd-optimizing-authentication-12 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. 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Sat, 30 Jan 2021 23:26:37 +0000 Received: by smtp416.mail.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 007c7cf40e530afe2219b18b78d1aa86; Sat, 30 Jan 2021 23:26:34 +0000 (UTC) User-Agent: Microsoft-MacOutlook/16.44.20121301 Date: Sat, 30 Jan 2021 18:26:32 -0500 Subject: Re: New Version Notification for draft-ietf-bfd-stability-07.txt From: Reshad Rahman To: Santosh P K , rtg-bfd WG Message-ID: <22DEF317-0F24-47BB-9489-1C5A9D824172@yahoo.com> Thread-Topic: New Version Notification for draft-ietf-bfd-stability-07.txt References: <161061832764.21019.1994746468167370229@ietfa.amsl.com> In-Reply-To: Mime-version: 1.0 Content-type: multipart/mixed; boundary="B_3694875994_1785370114" X-Mailer: WebService/1.1.17648 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.8) Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Jan 2021 23:26:45 -0000 > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3694875994_1785370114 Content-type: multipart/alternative; boundary="B_3694875994_1377021495" --B_3694875994_1377021495 Content-type: text/plain; charset="UTF-8" Content-transfer-encoding: quoted-printable Hi Santosh, =20 Thanks for making the changes and addressing my comments. =20 Nits: Null was changed to NULL except in the header of section 4 In section 4, it=E2=80=99d be good to have informative references for CFM and OWA= MP. =20 Regards, Reshad. =20 From: Rtg-bfd on behalf of Santosh P K Date: Thursday, January 14, 2021 at 8:35 AM To: rtg-bfd WG Subject: Fwd: New Version Notification for draft-ietf-bfd-stability-07.txt =20 I have refreshed stability draft. Diff from the previous version is attache= d.=20 ---------- Forwarded message --------- From: Date: Thu, Jan 14, 2021 at 3:28 PM Subject: New Version Notification for draft-ietf-bfd-stability-07.txt To: Ankur Saxena , Ashesh Mishra , Mach Chen , Mahesh Jethanandani , Peng Fan , Santosh Pallagatti A new version of I-D, draft-ietf-bfd-stability-07.txt has been successfully submitted by Santosh Pallagatti and posted to the IETF repository. Name: draft-ietf-bfd-stability Revision: 07 Title: BFD Stability Document date: 2021-01-14 Group: bfd Pages: 6 URL: https://www.ietf.org/archive/id/draft-ietf-bfd-stability-07= .txt Status: https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/ Htmlized: https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stabil= ity Htmlized: https://tools.ietf.org/html/draft-ietf-bfd-stability-07 Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-stability-= 07 Abstract: This document describes extensions to the Bidirectional Forwarding Detection (BFD) protocol to measure BFD stability. Specifically, it describes a mechanism for detection of BFD packet loss. Please note that it may take a couple of minutes from the time of submissio= n until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat --B_3694875994_1377021495 Content-type: text/html; charset="UTF-8" Content-transfer-encoding: quoted-printable

Hi Santosh,

 

Thanks for m= aking the changes and addressing my comments.

 

Nits:

  1. Null was changed to NULL except in the header of= section 4
  2. In section 4, it=E2=80=99d be good to have informative re= ferences for CFM and OWAMP.

&nbs= p;

Regards,

Res= had.

 

From: Rtg-bfd <rtg-bfd-bounces@ietf.org&g= t; on behalf of Santosh P K <santosh.pallagatti@gmail.com>
Date:= Thursday, January 14, 2021 at 8:35 AM
To: rtg-bfd WG <rtg-= bfd@ietf.org>
Subject: Fwd: New Version Notification for draft-= ietf-bfd-stability-07.txt

 

I have refreshed stability draft. Diff from the previous version i= s attached. 

---------- Forw= arded message ---------
From: <internet-drafts@ietf.org>
Date: Thu, Jan 14, 2021 at 3:28 PMSubject: New Version Notification for draft-ietf-bfd-stability-07.txt
To= : Ankur Saxena <ankurpsaxena@gmai= l.com>, Ashesh Mishra <mi= shra.ashesh@gmail.com>, Mach Chen <mach.chen@huawei.com>, Mahesh Jethanandani <mjethanandani@gmail.com>, Peng Fan <fanp08@gmail.com>, Santosh Pallagatti &= lt;santosh.pallagatti@gmail.co= m>




A new version of I-D, draft-ietf-bfd-stability-07.txt
has b= een successfully submitted by Santosh Pallagatti and posted to the
IETF r= epository.

Name:           draft-ietf-b= fd-stability
Revision:       07
Title:   = ;       BFD Stability
Document date:  2021-01-14
G= roup:          bfd
Pages:      &n= bsp;   6
URL:            https://www.ietf.org/archive/id/draft-ietf-bfd-stability-07.txt
Stat= us:         https://datatracker.ietf.org/d= oc/draft-ietf-bfd-stability/
Htmlized:       https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability<= br>Htmlized:       https://tools.ietf.org/html/dra= ft-ietf-bfd-stability-07
Diff:          &nbs= p;https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-stability-07<= /a>

Abstract:
   This document describes extensions to t= he Bidirectional Forwarding
   Detection (BFD) protocol to meas= ure BFD stability.  Specifically, it
   describes a mechan= ism for detection of BFD packet loss.




Please note that it= may take a couple of minutes from the time of submission
until the htmli= zed version and diff are available at tools.ietf.org.

The IETF Secretariat

=

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Sat, 28 Nov 2020 04:27:20 -0800 (PST) MIME-Version: 1.0 References: <159463868413.22444.9991690475315066846@ietfa.amsl.com> <1B318C9F-DF6A-4762-9AAF-A2AD8A025E24@cisco.com> <9784D287-8C2D-4EFF-9586-0B4B440B2B4C@cisco.com> In-Reply-To: <9784D287-8C2D-4EFF-9586-0B4B440B2B4C@cisco.com> From: Santosh P K Date: Sat, 28 Nov 2020 17:57:08 +0530 Message-ID: Subject: Re: New Version Notification for draft-ietf-bfd-stability-06.txt To: "Reshad Rahman (rrahman)" Content-Type: multipart/alternative; boundary="000000000000f7788505b529e5c1" Archived-At: X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rtg-bfd WG , "reshad@yahoo. com" Errors-To: rtg-bfd-bounces@ietf.org Sender: "Rtg-bfd" Content-Length: 17273 --000000000000f7788505b529e5c1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sure will do that. On Tue, Nov 24, 2020, 5:54 AM Reshad Rahman (rrahman) wrote: > Hi Santosh, authors, > > > > The comments below are pretty minor. Please address them in next rev and > we=E2=80=99ll be good to go to next step for this document. > > > > Regards, > > Reshad, > > > > *From: *Rtg-bfd on behalf of "Reshad Rahman > (rrahman)" > *Date: *Thursday, July 23, 2020 at 10:43 PM > *To: *Santosh P K , "rtg-bfd@ietf.org" < > rtg-bfd@ietf.org> > *Subject: *Re: New Version Notification for > draft-ietf-bfd-stability-06.txt > > > > Hi Santosh, > > > > Thanks for addressing the comments. > > > > General: NULL authentication TLV is still used, should be replaced with > NULL authentication type or section as appropriate. > > Be consistent for Null v/s NULL (NULL Auth is used in > bfd-optimizing-authentication) > > > > Introduction > > s/detect lost packet/detect lost packets/ > > > > Section 3 Use Cases: > > s/any BFD packet loss if loss/any BFD packet loss if the loss/ > > s/BFD implementation/BFD implementations/ > > Where the text says =E2=80=9Cfailure of a link=E2=80=9D, might be better = to say =E2=80=9Cfailure > of a datapath=E2=80=9D? > > Informative references to CFM and TWAMP would be useful > > > > Section 4 > > =E2=80=9Cby appending the Null-Authentication type =E2=80=9C. Suggest =E2= =80=9Cby appending an authentication section with the NULL Authentication t= ype =E2=80=9C > > > > Section 5 > > =E2=80=9CBFD uses authentication TLV=E2=80=9D, suggest change to =E2=80= =9CBFD uses an > authentication section=E2=80=9D. > > > > =E2=80=9CBFD packets MUST include NULL-Auth TLV=E2=80=9D. Change to =E2= =80=9CBFD control packets > MUST include an authentication section with the NULL Authentication type= =E2=80=9D > > > > Section 5.1 > > > > =E2=80=9CThe first BFD NULL-Auth type processed by the receiver=E2=80=A6= =E2=80=9D. Change to =E2=80=9CThe first BFD authentication section with t= he NULL Authentication type, in a valid BFD control packet, processed by th= e receiver=E2=80=9D . > > Also, does it have to be NULL Auth, I believe it can be any auth with seq= uence number? If that=E2=80=99s the case change to =E2=80=9CThe first BFD = authentication section with a non-zero sequence number, in a valid BFD cont= rol packet, processed by the receiver is used for=E2=80=A6.=E2=80=9D. > > > > Regards, > > Reshad. > > > > *From: *Rtg-bfd on behalf of Santosh P K < > santosh.pallagatti@gmail.com> > *Date: *Sunday, July 19, 2020 at 4:06 PM > *To: *"rtg-bfd@ietf.org" > *Subject: *Fwd: New Version Notification for > draft-ietf-bfd-stability-06.txt > > > > Hello All, > > A new version of draft for BFD-stablity is here for review. Changes > include addressing shepherd comments as provided here. > https://datatracker.ietf.org/doc/draft-ietf-bfd-stability/shepherdwriteup= /. > Please also see attached diff. > > > > Thanks > > Santosh P K > > ---------- Forwarded message --------- > From: > Date: Mon, Jul 13, 2020 at 4:41 PM > Subject: New Version Notification for draft-ietf-bfd-stability-06.txt > To: Mach Chen , Ankur Saxena , > Peng Fan , Mahesh Jethanandani , > Ashesh Mishra , Santosh Pallagatti < > santosh.pallagatti@gmail.com> > > > > > A new version of I-D, draft-ietf-bfd-stability-06.txt > has been successfully submitted by Santosh Pallagatti and posted to the > IETF repository. > > Name: draft-ietf-bfd-stability > Revision: 06 > Title: BFD Stability > Document date: 2020-07-13 > Group: bfd > Pages: 6 > URL: > https://www.ietf.org/internet-drafts/draft-ietf-bfd-stability-06.txt > Status: https://datatracker.ietf.org/doc/draft-ietf-bfd-stability= / > Htmlized: https://tools.ietf.org/html/draft-ietf-bfd-stability-06 > Htmlized: > https://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability > Diff: > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-stability-06 > > Abstract: > This document describes extensions to the Bidirectional Forwarding > Detection (BFD) protocol to measure BFD stability. Specifically, it > describes a mechanism for detection of BFD packet loss. > > > > > Please note that it may take a couple of minutes from the time of > submission > until the htmlized version and diff are available at tools.ietf.org. > > The IETF Secretariat > > > --000000000000f7788505b529e5c1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Sure will do that.=C2=A0

On Tue, Nov 24, 2020, 5:54 AM Res= had Rahman (rrahman) <rrahman@cisco= .com> wrote:

Hi Santosh, authors,<= /u>

=C2=A0

The comments below are pretty m= inor. Please address them in next rev and we=E2=80=99ll be good to go to ne= xt step for this document.

=C2=A0

Regards,

Reshad,

=C2=A0

From= : Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of "Reshad Rahman (rrahman= )" <rrahman=3D40cisco.com@dmarc.ietf.org>
Date: Thursday, July 23, 2020 at 10:43 PM
To: Santosh P K <santosh.pallagatti@gmail.com>, = "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>
Subject: Re: New Version Notification for draft-ietf-bfd-stability-0= 6.txt

=C2=A0

Hi Santosh,

=C2=A0

Thanks for addressing the comme= nts.

=C2=A0

General: NULL authentication TL= V is still used, should be replaced with NULL authentication type or sectio= n as appropriate.

Be consistent for Null v/s NULL= (NULL Auth is used in bfd-optimizing-authentication)<= /p>

=C2=A0

Introduction

s/detect lost packet/detect los= t packets/

=C2=A0

Section 3 Use Cases: =

s/any BFD packet loss if loss/a= ny BFD packet loss if the loss/

s/BFD implementation/BFD implem= entations/

Where the text says =E2=80=9Cfa= ilure of a link=E2=80=9D, might be better to say =E2=80=9Cfailure of a data= path=E2=80=9D?

Informative references to CFM a= nd TWAMP would be useful

=C2=A0

Section 4<= /p> 

=E2=80=9Cby appending the Null-Aut=
hentication type =E2=80=9C. Suggest =E2=80=9Cby appending an authentication=
 section with the NULL Authentication type =E2=80=9C

=C2=A0


Section 5<=
/p>

=E2=80=9CBFD uses authenticatio=
n TLV=E2=80=9D, suggest change to =E2=80=9CBFD uses an authentication secti=
on=E2=80=9D.


=C2=A0


=E2=80=9CBFD packets MUST inclu=
de NULL-Auth TLV=E2=80=9D. Change to =E2=80=9CBFD control packets MUST incl=
ude an authentication section with the NULL Authentication type=E2=80=9D


=C2=A0


Section 5.1


=C2=A0


=E2=80=9CThe first BFD NULL-Auth type processed by the=
 receiver=E2=80=A6=E2=80=9D.=C2=A0 Change to =C2=A0=E2=80=9CThe first BFD a=
uthentication section with the NULL Authentication type=
, in a valid BFD control packet, processed by the receiver=E2=80=9D .


Also, does it have to be NULL Auth, I believe it can b=
e any auth with sequence number? If that=E2=80=99s the case change to =C2=
=A0=E2=80=9CThe first BFD authentication section with a=
 non-zero sequence number, in a valid BFD control packet, processed by the =
receiver is used for=E2=80=A6.=E2=80=9D.


=C2=A0


Regards,


Reshad.


=C2=A0




From=
: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Santosh P K <sa=
ntosh.pallagatti@gmail.com>

Date: Sunday, July 19, 2020 at 4:06 PM

To: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>

Subject: Fwd: New Version Notification for draft-ietf-bfd-stability-=
06.txt






=C2=A0






Hello All,




=C2=A0 =C2=A0 A new version of draft for BFD-stablit=
y is here for review. Changes include addressing shepherd comments as provi=
ded here.=C2=A0https://dat=
atracker.ietf.org/doc/draft-ietf-bfd-stability/shepherdwriteup/.
 Please also see attached diff.=C2=A0






=C2=A0






Thanks






Santosh P K=C2=A0<=
/u>






---------- Forwarded message ---------

From: <internet-drafts@ietf.org>

Date: Mon, Jul 13, 2020 at 4:41 PM

Subject: New Version Notification for draft-ietf-bfd-stability-06.txt

To: Mach Chen <mach.chen@huawei.com>, Ankur Saxena <ank=
urpsaxena@gmail.com>, Peng Fan <fanp08@gmail.com>, Mahesh Je=
thanandani <mjethanandani@gmail.com>,
 Ashesh Mishra <mishra.ashesh@gmail.com>, Santosh Pallagatti=
 <santosh.pallagatti@gmail.com>










A new version of I-D, draft-ietf-bfd-stability-06.txt

has been successfully submitted by Santosh Pallagatti and posted to the

IETF repository.



Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-ietf-bfd-stability

Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A006

Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD Stability

Document date:=C2=A0 2020-07-13

Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 bfd

Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6

URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 
https://www.ietf.org/internet-drafts/draft-ietf-bfd-stability-06.txt
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0h=
ttps://datatracker.ietf.org/doc/draft-ietf-bfd-stability/

Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0https://t=
ools.ietf.org/html/draft-ietf-bfd-stability-06

Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0ht=
tps://datatracker.ietf.org/doc/html/draft-ietf-bfd-stability

Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-stability-06



Abstract:

=C2=A0 =C2=A0This document describes extensions to the Bidirectional Forwar=
ding

=C2=A0 =C2=A0Detection (BFD) protocol to measure BFD stability.=C2=A0 Speci=
fically, it

=C2=A0 =C2=A0describes a mechanism for detection of BFD packet loss.









Please note that it may take a couple of minutes from the time of submissio=
n

until the htmlized version and diff are available at 
tools.ietf.org.



The IETF Secretariat
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Sun, 31 Jan 2021 17:52:38 +0000 Received: by smtp401.mail.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 4874ad88f9feb90f23627219c1535f21; Sun, 31 Jan 2021 17:52:36 +0000 (UTC) User-Agent: Microsoft-MacOutlook/16.44.20121301 Date: Sun, 31 Jan 2021 12:52:34 -0500 Subject: Re: Shephered writeup for draft-ietf-bfd-secure-sequence-numbers From: Reshad Rahman To: Sonal Agarwal , Jeffrey Haas CC: "rtg-bfd@ietf.org" , "draft-ietf-bfd-secure-sequence-numbers@ietf.org" , Martin Vigoureux Message-ID: <968A8D6A-9D2A-43A6-B65D-F475E4AEDF7B@yahoo.com> Thread-Topic: Shephered writeup for draft-ietf-bfd-secure-sequence-numbers References: <043D4BDD-5024-4F99-83E8-1E3ECD6F4E44@cisco.com> <20201202214610.GC29769@pfrc.org> In-Reply-To: Mime-version: 1.0 Content-type: multipart/alternative; boundary="B_3694942356_1646439545" X-Mailer: WebService/1.1.17648 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Apache-HttpAsyncClient/4.1.4 (Java/11.0.8) Archived-At: X-Mailman-Approved-At: Sun, 31 Jan 2021 14:03:45 -0800 X-BeenThere: rtg-bfd@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "RTG Area: Bidirectional Forwarding Detection DT" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 31 Jan 2021 17:52:45 -0000 > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3694942356_1646439545 Content-type: text/plain; charset="UTF-8" Content-transfer-encoding: quoted-printable Hi Sonal, authors, =20 Thanks for the document update. Main comments: =20 Hash has been replaced by symmetric algorithm, to be able to retrieve the s= equence number at the receiving side, this is good.=20 Section 3 mentions that the symmetric key is provisioned securely on sender= and receiver, but there is no mention of provisioning of the algorithm/func= tion. Also there is no mention of what algorithms to use, is this on purpose= since what=E2=80=99s good today will not be recommended tomorrow? Should we at le= ast say =E2=80=9Cdo not use DES=E2=80=9D or too obvious? Was there any discussions/thoughts on using asymmetric encryption instead (= I didn=E2=80=99t follow this document when it started)? It avoids the pain of havi= ng a shared secret. I=E2=80=99m not saying we should go with asymmetric, just wond= ering. For the key, the terms =E2=80=9Csymmetric key=E2=80=9D, =E2=80=9Cshared secret key=E2=80=9D and =E2=80=9C= shared key=E2=80=9D are used, settle on one for clarity (I believe it should be =E2=80= =9Cshared key=E2=80=9D or =E2=80=9Cshared secret=E2=80=9D?) For the algorithm, the terms =E2=80=9Csymmetric key algorithm=E2=80=9D, =E2=80=9Csymmetric al= gorithm=E2=80=9D , =E2=80=9Csymmetric encryption algorithm=E2=80=9D, =E2=80=9Csymmetric decryption a= lgorithm=E2=80=9D are used. Again, pick 1 =E2=80=9Csymmetric algorithm=E2=80=9D?). The term =E2=80=9Chash=E2=80=9D is still used e.g. in section 4 header Security is not my expertise. Should we get a security review asap, as oppo= sed to waiting for IESG review. Jeff/Martin? Diagram chains are clearer now. Sequence number validity as described at the bottom of page 3 and on P4 (at= the end of section 3). RFC5880 sections 6.7.3 and 6.7.4 describe that recei= ved sequence number should be between bfd.RcvAuthSeq(+1) to bfd.RcvAuthSeq+(= 3*Detect Mult) inclusive. I don=E2=80=99t see why this has to be changed for secur= e sequence numbers. Jeff=E2=80=99s comment regarding =E2=80=9CThe first sequence number can be obtained=E2=80=A6=E2= =80=9D in section 3. I believe the text is incorrect. RFC5880 sections 6.7.3 and= 6.7.4 explain how the first sequence number is obtained (using bfd.AuthSeqK= nown and bfd.RcvAuthSeq). =20 Nits: =20 Section 4: s/=E2=80=9Dwhile encryption/decryption=E2=80=9D/=E2=80=9Dwhile doing encryption/de= cryption=E2=80=9D/ What does =E2=80=9Cnon linear=E2=80=9D mean in =E2=80=9Cmonotonically increasing (but non lin= ear) sequence number=E2=80=9D? Section 7: s/Jeff Hass/Jeff Haas/ =20 Regards, Reshad. =20 =20 From: Rtg-bfd on behalf of Sonal Agarwal Date: Wednesday, December 16, 2020 at 6:37 PM To: Jeffrey Haas Cc: "rtg-bfd@ietf.org" , "reshad@yahoo. com" , "draft-ietf-bfd-secure-sequence-numbers@ietf.org" Subject: Re: Shephered writeup for draft-ietf-bfd-secure-sequence-numbers =20 Hi Reshad, Jeff, =20 Thanks very much for the review. We have posted a new version of the draft = that should address your concerns. =20 URL: https://www.ietf.org/archive/id/draft-ietf-bfd-secure-seque= nce-numbers-07.txt Status: https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequ= ence-numbers/ Htmlized: https://datatracker.ietf.org/doc/html/draft-ietf-bfd-secure= -sequence-numbers Htmlized: https://tools.ietf.org/html/draft-ietf-bfd-secure-sequence-= numbers-07 =20 Regards, Sonal. =20 =20 On Wed, Dec 2, 2020 at 1:37 PM Jeffrey Haas wrote: It's been some time since I've reviewed the entire document, so this is almost fresh for me as well. :-) My comments largely follow Reshad's: - I don't know what [S] is intended to be. =20 - The chains in the diagrams aren't necessarily clear. I think they're intended to represent that you can work forward and backward through the mechanism, but I don't think they're helping with clarity. My memory of our prior conversations were that we'd discussed a hash that had the properties we wanted here. But that hash isn't in the document. Alan, could you remind us of the example you gave? I think my biggest procedural issue is discovering the initial sequence number. Since the Receiver is always receiving the output of the hash itself, how does it discover the initial sequence number? If this is a has= h rather than a symmetric operation, we don't have the property that=20 hash(s,k) =3D H1; hash (H1,k) =3D s So, I think we need some clarity for this sentence: Note: The first sequence number can be obtained using the same logic as used in determining Local Discriminator value for the session or by using a random number. -- Jeff On Tue, Nov 24, 2020 at 12:09:53AM +0000, Reshad Rahman (rrahman) wrote: > Hi, >=20 > Authors, thank you for addressing my comments in rev-06. >=20 > I believe there=E2=80=99s some room for clarification in Section 3. >=20 > Comments: >=20 > 1. [0] states monotonically increasing sequence number but the sequenc= e number is actually in [S] >=20 > [A] states Authentication but the authentication format contains the sequ= ence #. So this is supposed to be the hash of the BFD packet as described in= 4.4 of RFC5880. >=20 >=20 >=20 > As currently defined in BFD [RFC5880], a BFD packet with > authentication will undergo the following steps, where: >=20 > [O]: original RFC 5880 packet with monotonically increasing sequence > number >=20 > [S]: pseudo random sequence number >=20 > [A]: Authentication >=20 > Sender Receiver >=20 > [O] [S] [A] ------------- [A] [S] [O] >=20 >=20 > 1. The text below states that =E2=80=9Cmechanism of provisioning such a key = is outside the scope of this document=E2=80=9D. But further down H1 and H2 are bo= th calculated with key =E2=80=98k=E2=80=99. So is the key to calculate the sequence numb= er hash the same as the key to calculate the hash for the packet (as per sec= tion 4.4 of RFC5880)? And if they are the same and the attacker has it, can=E2= =80=99t the attacker fudge the sequence number hash also? I think I could be mis= sing something here. >=20 > This document proposes that for enhanced security in sequence number > encoding, the sender would identify a hash algorithm (symmetric) that > would create a 32 bit hash. The hashing key is provisioned securely > on the sender and receiver of the BFD session. The mechanism of > provisioning such a key is outside the scope of this document. > Instead of using the sequence number, the sender encodes the sequence > number with the hashing key to produce a hash. >=20 >=20 > 1. When the receiver does the reverse hash operation to extract the se= quence number, > previously received =E2=80=98s=E2=80=99 is not enough as per previous= text which mentions tolerate dropped frames. >=20 >=20 >=20 > k: hashing key >=20 >=20 >=20 > s: sequence number >=20 >=20 >=20 > O: original RFC 5880 packet with monotonically increasing sequence >=20 > number >=20 >=20 >=20 > 1. What is meant by =E2=80=9Cremainder of packet=E2=80=9D? >=20 >=20 >=20 > R: remainder of packet >=20 >=20 >=20 > H1: hash of s >=20 >=20 >=20 > H2: hash of entire packet >=20 >=20 >=20 > A: H2 + insertion in packet >=20 >=20 >=20 > hash(s, k) =3D H1 >=20 >=20 >=20 > hash((H1 + R), k) =3D H2 >=20 >=20 >=20 > hash'((Packet - H2), k) =3D=3D H2 ? Good packet : bad packet >=20 >=20 >=20 > hash'(H1, k) > previously received s ? Good sequence number : bad >=20 > sequence number >=20 >=20 >=20 > Sender Receiver >=20 >=20 >=20 > [O] [H1] [A] -------- [A] [H1] [O] >=20 >=20 >=20 > The above diagram describes how the sender encodes and receiver >=20 > decodes the sequence number. The sender starts by taking the >=20 > monotonically increasing sequence number and hashing it. It replaces >=20 > the sequence number with the hash. It then calculates the hash for >=20 > the entire packet and appends the hash value to the end of the >=20 > packet, before transmitting it. >=20 >=20 >=20 > 1. s/retrieve s/retrieve =E2=80=98s=E2=80=99/ and s/monotically/monotonically/ >=20 >=20 >=20 > The receiver hashes the entire packet without H2, and compares the >=20 > hash value with the received hash (H2). If the hash values are >=20 > equal, it is a good packet, else it is a bad packet. It then >=20 > calculates the hash on the received sequence number to retreive s. >=20 > If it is greater than the previously received monotically increasing >=20 > sequence number, then the receiver knows it's a valid sequence >=20 > number. >=20 > Regards, > Reshad. >=20 > From: "Reshad Rahman (rrahman)" > Date: Sunday, June 14, 2020 at 2:50 PM > To: "rtg-bfd@ietf.org" , "draft-ietf-bfd-secure-sequenc= e-numbers@ietf.org" > Subject: Shephered writeup for draft-ietf-bfd-secure-sequence-numbers >=20 > Authors, WG, >=20 > The writeup is available at https://datatracker.ietf.org/doc/draft-ietf-b= fd-secure-sequence-numbers/shepherdwriteup/ >=20 > For convenience I=E2=80=99ve copied the comments on the document below. >=20 > Regards, > Reshad. >=20 >=20 > This document updates RFC5880. This is missing from the title page header= . >=20 >=20 >=20 > Abstract >=20 > s/a security enhancements/a security enhancement/ >=20 > Suggestion: =E2=80=9CThis document describes a security enhancement for the seq= uence number used in BFD control packets=E2=80=9D. >=20 >=20 >=20 > Requirements Language >=20 > Please put this later in the document, e.g. after introduction. Add RFC81= 74, and add it as normative reference. >=20 >=20 >=20 > Introduction >=20 > Don=E2=80=99t use Authentication TLV, instead use =E2=80=9CAuthentication Section=E2=80=9D.= E.g. >=20 > s/in BFD authentication TLVs/in the BFD authentication section/ >=20 >=20 >=20 >=20 >=20 > s/pseudo-random sequence numbers on the frame/pseudo-random sequence numb= ers in BFD control packets/ >=20 > I=E2=80=99m not sure I understood the last sentence starting with =E2=80=9CFurther se= curity may be =E2=80=A6.=E2=80=9D. What is =E2=80=9Cresetting un-encrypted sequence=E2=80=9D? Does i= t mean that when the sequence numbers rolls over, it=E2=80=99s reset to a pseudo-r= andom number? >=20 >=20 >=20 > Section 2 >=20 > Rename to =E2=80=9CTheory of operation=E2=80=9D >=20 > Suggest splitting the 1st sentence, e.g. >=20 > Instead of inserting a monotonically, sometimes occasionally, increasi= ng >=20 > sequence number in BFD control packets, a hash is inserted instead. >=20 > The hash is computed, using a shared key, on the sequence number. That >=20 > computed hash is then inserted into the sequence number field of the >=20 > packet. >=20 >=20 >=20 > In the following sentence, the part =E2=80=9Cused in computing an authenticated= packet=E2=80=9D is referring to computing the SHA1/MD5 hash/digest for the packet= ? That sentence should be clarified then. >=20 > In >=20 > case of BFD Authentication [I-D.ietf-bfd-optimizing-authentication], >=20 > the sequence number used in computing an authenticated packet would >=20 > be this new computed hash. >=20 >=20 >=20 > Also, when referring to the optimization draft, better to use e.g. =E2=80=9Copt= imized BFD authentication=E2=80=9D than =E2=80=9CBFD authentication=E2=80=9D. The latter impli= es per-RFC5880 BFD authentication. >=20 >=20 >=20 > s/psuedo/pseudo/ >=20 > s/ scope of this draft/ scope of this document/ >=20 > s/seuquence/sequence/ >=20 >=20 >=20 > Not clear to me what the following means. >=20 > Note: The first sequence number can >=20 > be obtained using the same logic as the My Discriminator value. >=20 >=20 >=20 > The diagram reads well for regular authentication. For secure sequence nu= mber, I think the diagram would gain clarity from an ordered list of steps o= n the sender and receiver. The current list before the diagram is useful, I= believe the sender steps would start at =E2=80=9CH1:=E2=80=9D and the receiver steps at= hash=E2=80=99. And yes, hash=E2=80=99 needs an explanation. On the receiver side, for v= alidating that =E2=80=99s=E2=80=99 is a good sequence number, the range has to be checke= d as mentioned in the previous paragraph. >=20 >=20 >=20 > Section 5 >=20 > s/ stabiluty/ stability/ >=20 > s/admistratively/administratively/ >=20 > s/Sequential nature/The sequential nature/ >=20 > Date: Wed, 05 Aug 2020 16:28:55 -0700 > From: internet-drafts@ietf.org > To: i-d-announce@ietf.org > CC: rtg-bfd@ietf.org > Subject: I-D Action: draft-ietf-bfd-secure-sequence-numbers-06.txt >=20 >=20 > A New Internet-Draft is available from the on-line Internet-Drafts direct= ories. > This draft is a work item of the Bidirectional Forwarding Detection WG of= the IETF. >=20 > Title : Secure BFD Sequence Numbers > Authors : Mahesh Jethanandani > Sonal Agarwal > Ashesh Mishra > Ankur Saxena > Alan DeKok > Filename : draft-ietf-bfd-secure-sequence-numbers-06.txt > Pages : 6 > Date : 2020-08-05 >=20 > Abstract: > This document describes a security enhancement for the sequence > number used in BFD control packets. This document updates RFC 5880. >=20 >=20 > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbers/ >=20 > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-bfd-secure-sequence-numbers-06 > https://datatracker.ietf.org/doc/html/draft-ietf-bfd-secure-sequence-numb= ers-06 >=20 > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-secure-sequence-numbers-= 06 >=20 >=20 > Please note that it may take a couple of minutes from the time of submiss= ion > until the htmlized version and diff are available at tools.ietf.org. >=20 > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ >=20 >=20 >=20 --B_3694942356_1646439545 Content-type: text/html; charset="UTF-8" Content-transfer-encoding: quoted-printable

Hi Sonal, authors,

 

Thank= s for the document update. Main comments:

<= o:p> 

  1. Hash has been r= eplaced by symmetric algorithm, to be able to retrieve the sequence number a= t the receiving side, this is good.
    1. Section 3 mentions that the symmetric key is provisioned se= curely on sender and receiver, but there is no mention of provisioning of th= e algorithm/function. Also there is no mention of what algorithms to use, is= this on purpose since what=E2=80=99s good today will not be recommended tomorrow?= Should we at least say =E2=80=9Cdo not use DES=E2=80=9D or too obvious?
      2. =
    2. W= as there any discussions/thoughts on using asymmetric encryption instead (I = didn=E2=80=99t follow this document when it started)? It avoids the pain of having= a shared secret. I=E2=80=99m not saying we should go with asymmetric, just wonder= ing.
    3. For the key, the terms =E2=80=9Csymmetric key=E2=80=9D, =E2=80=9Cshared sec= ret key=E2=80=9D and =E2=80=9Cshared key=E2=80=9D are used, settle on one for clarity (I belie= ve it should be =E2=80=9Cshared key=E2=80=9D or =E2=80=9Cshared secret=E2=80=9D?)
      4. For = the algorithm, the terms =E2=80=9Csymmetric key algorithm=E2=80=9D, =E2=80=9Csymmetric algorit= hm=E2=80=9D , =E2=80=9Csymmetric encryption algorithm=E2=80=9D, =E2=80=9Csymmetric decryption algori= thm=E2=80=9D are used. Again, pick 1 =E2=80=9Csymmetric algorithm=E2=80=9D?).<= li class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level2 lfo1'>Th= e term =E2=80=9Chash=E2=80=9D is still used e.g. in section 4 header
    4. Secur= ity is not my expertise. Should we get a security review asap, as opposed to= waiting for IESG review. Jeff/Martin?
  2. Diagram chains are= clearer now.
  3. Sequence number validity as described at the bot= tom of page 3 and on P4 (at the end of section 3). RFC5880 sections 6.7.3 an= d 6.7.4 describe that received sequence number should be between bfd.RcvAuthSeq(+1) to bfd.Rc= vAuthSeq+(3*Detect Mult) inclusive. I don=E2=80=99t see why this has to be changed= for secure sequence numbers.
  4. Jeff=E2=80=99s comment regardin= g =E2=80=9CThe first sequence number can be obtained=E2=80=A6=E2=80=9D in section 3. I believe= the text is incorrect. RFC5880 sections 6.7.3 and 6.7.4 explain how the fir= st sequence number is obtained (using bfd.AuthSeqKnown and bfd.RcvAuthSeq).<= o:p>

 

Nits:

 

Section 4: s/=E2=80=9Dwhile encryption/decryption=E2=80=9D/=E2=80=9Dwhile doing encrypti= on/decryption=E2=80=9D/

What does =E2=80=9Cnon linear=E2=80=9D mean in =E2=80=9Cmonotonically increasing (but non linear) sequence number=E2=80=9D?

Section 7: s/Jeff Hass/Jeff Haas/

 

Regards,

Reshad.

 

 

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of Sonal Agarwal &= lt;sagarwal12@gmail.com>
Date: Wednesday, December 16, 2020 at = 6:37 PM
To: Jeffrey Haas <jhaas@pfrc.org>
Cc: &quo= t;rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "reshad@yahoo. com&q= uot; <reshad@yahoo.com>, "draft-ietf-bfd-secure-sequence-numbers@= ietf.org" <draft-ietf-bfd-secure-sequence-numbers@ietf.org>
Subject: Re: Shephered writeup for draft-ietf-bfd-secure-sequence-numbe= rs

 

<= /div>

Hi Reshad, Jeff,

 

Thanks very much = for the review. We have posted a new version of the draft that should addres= s your concerns.

 

 

Regards,

Sonal.

 =

 

On Wed, Dec 2, 2020 at 1:37 PM Jeffrey Haas <jhaas@pfrc.org> wrote:

It's been some time since I've reviewed the entire document, s= o this is
almost fresh for me as well. :-)

My comments largely fol= low Reshad's:
- I don't know what [S] is intended to be. 
- The = chains in the diagrams aren't necessarily clear.  I think they're
&n= bsp; intended to represent that you can work forward and backward through th= e
  mechanism, but I don't think they're helping with clarity.
My memory of our prior conversations were that we'd discussed a hash that<= br>had the properties we wanted here.  But that hash isn't in the docum= ent.
Alan, could you remind us of the example you gave?

I think my= biggest procedural issue is discovering the initial sequence
number.&nbs= p; Since the Receiver is always receiving the output of the hash
itself, = how does it discover the initial sequence number?  If this is a hashrather than a symmetric operation, we don't have the property that
hash= (s,k) =3D H1; hash (H1,k) =3D s

So, I think we need some clarity for this= sentence:
   Note: The first sequence number can
  &nb= sp;be obtained using the same logic as used in determining Local
  &= nbsp;Discriminator value for the session or by using a random number.
-- Jeff

On Tue, Nov 24, 2020 at 12:09:53AM +0000, Reshad Rahman (rra= hman) wrote:
> Hi,
>
> Authors, thank you for addressing = my comments in rev-06.
>
> I believe there=E2=80=99s some room for cl= arification in Section 3.
>
> Comments:
>
>  =  1.  [0] states monotonically increasing sequence number but the s= equence number is actually in [S]
>
> [A] states Authentication= but the authentication format contains the sequence #. So this is supposed = to be the hash of the BFD packet as described in 4.4 of RFC5880.
> >
>
>    As currently defined in BFD [RFC5880], = a BFD packet with
>    authentication will undergo the follo= wing steps, where:
>
>    [O]: original RFC 5880 pack= et with monotonically increasing sequence
>    number
>= ;
>    [S]: pseudo random sequence number
>
>&= nbsp;   [A]: Authentication
>
>       =             Sender       =             Receiver
>
>  &= nbsp;                 [O] [S] [A] --= ----------- [A] [S] [O]
>
>
>   1.  The t= ext below states that =E2=80=9Cmechanism of provisioning such a key is outside the= scope of this document=E2=80=9D.  But further down H1 and H2 are both calcul= ated with key =E2=80=98k=E2=80=99. So is the key to calculate the sequence number hash t= he same as the key to calculate the hash for the packet (as per section 4.4 = of RFC5880)? And if they are the same and the attacker has it, can=E2=80=99t the a= ttacker fudge the sequence number hash also? I think I could be missing some= thing here.
>
>    This document proposes that for en= hanced security in sequence number
>    encoding, the sender= would identify a hash algorithm (symmetric) that
>    would= create a 32 bit hash.  The hashing key is provisioned securely
>=     on the sender and receiver of the BFD session.  The mecha= nism of
>    provisioning such a key is outside the scope of= this document.
>    Instead of using the sequence number, t= he sender encodes the sequence
>    number with the hashing = key to produce a hash.
>
>
>   1.  When t= he receiver does the reverse hash operation to extract the sequence number,&= nbsp; > previously received =E2=80=98s=E2=80=99  is not enough as per previous t= ext which mentions tolerate dropped frames.
>
>
>
&g= t;    k: hashing key
>
>
>
>  &nbs= p; s: sequence number
>
>
>
>    O: ori= ginal RFC 5880 packet with monotonically increasing sequence
>
>= ;    number
>
>
>
>   1. = ; What is meant by =E2=80=9Cremainder of packet=E2=80=9D?
>
>
>
= >    R: remainder of packet
>
>
>
>&= nbsp;   H1: hash of s
>
>
>
>    H= 2: hash of entire packet
>
>
>
>    A: = H2 + insertion in packet
>
>
>
>    has= h(s, k) =3D H1
>
>
>
>    hash((H1 + R), = k) =3D H2
>
>
>
>    hash'((Packet - H2),= k) =3D=3D H2 ? Good packet : bad packet
>
>
>
> = ;   hash'(H1, k) > previously received s ? Good sequence number : ba= d
>
>    sequence number
>
>
> >                    =  Sender                Receiver=
>
>
>
>           =          [O] [H1] [A] -------- [A] [H1] [O]
>= ;
>
>
>    The above diagram describes how th= e sender encodes and receiver
>
>    decodes the sequ= ence number.  The sender starts by taking the
>
>  &n= bsp; monotonically increasing sequence number and hashing it.  It repla= ces
>
>    the sequence number with the hash.  I= t then calculates the hash for
>
>    the entire pack= et and appends the hash value to the end of the
>
>   = ; packet, before transmitting it.
>
>
>
>  &= nbsp;1.  s/retrieve s/retrieve =E2=80=98s=E2=80=99/ and s/monotically/monotonically= /
>
>
>
>    The receiver hashes the en= tire packet without H2, and compares the
>
>    hash = value with the received hash (H2).  If the hash values are
>
= >    equal, it is a good packet, else it is a bad packet. = It then
>
>    calculates the hash on the received s= equence number to retreive s.
>
>    If it is greater= than the previously received monotically increasing
>
>  =   sequence number, then the receiver knows it's a valid sequence
>= ;
>    number.
>
> Regards,
> Reshad.>
> From: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
> Date: = Sunday, June 14, 2020 at 2:50 PM
> To: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "draft-iet= f-bfd-secure-sequence-numbers@ietf.org" <draft-ietf-bfd-sec= ure-sequence-numbers@ietf.org>
> Subject: Shephered writeup for= draft-ietf-bfd-secure-sequence-numbers
>
> Authors, WG,
>= ;
> The writeup is available at https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbers/sh= epherdwriteup/
>
> For convenience I=E2=80=99ve copied the commen= ts on the document below.
>
> Regards,
> Reshad.
> =
>
> This document updates RFC5880. This is missing from the ti= tle page header.
>
>
>
> Abstract
>
>= ; s/a security enhancements/a security enhancement/
>
> Suggest= ion: =E2=80=9CThis document describes a security enhancement for the sequence numb= er used in BFD control packets=E2=80=9D.
>
>
>
> Requir= ements Language
>
> Please put this later in the document, e.g.= after introduction. Add RFC8174, and add it as normative reference.
>=
>
>
> Introduction
>
> Don=E2=80=99t use Authen= tication TLV, instead use =E2=80=9CAuthentication Section=E2=80=9D. E.g.
>
>= ; s/in BFD authentication TLVs/in the BFD authentication section/
> >
>
>
>
> s/pseudo-random sequence numbers = on the frame/pseudo-random sequence numbers in BFD control packets/
> =
> I=E2=80=99m not sure I understood the last sentence starting with =E2=80=9CFurt= her security may be =E2=80=A6.=E2=80=9D. What is =E2=80=9Cresetting un-encrypted sequence=E2=80=9D? = Does it mean that when the sequence numbers rolls over, it=E2=80=99s reset to a ps= eudo-random number?
>
>
>
> Section 2
> > Rename to =E2=80=9CTheory of operation=E2=80=9D
>
> Suggest splitting= the  1st sentence, e.g.
>
>    Instead of inser= ting a monotonically, sometimes occasionally, increasing
>
>&nb= sp;   sequence number in BFD control packets, a hash is inserted instea= d.
>
>    The hash is computed, using a shared key, o= n the sequence number. That
>
>    computed hash is t= hen inserted into the sequence number field of the
>
>  &n= bsp; packet.
>
>
>
> In the following sentence, t= he part =E2=80=9Cused in computing an authenticated packet=E2=80=9D is referring to comp= uting the SHA1/MD5 hash/digest for the packet? That sentence should be clari= fied then.
>
>              =                      =                      = ;           In
>
>    case o= f BFD Authentication [I-D.ietf-bfd-optimizing-authentication],
>
&= gt;    the sequence number used in computing an authenticated pack= et would
>
>    be this new computed hash.
> >
>
> Also, when referring to the optimization draft, bet= ter to use e.g. =E2=80=9Coptimized BFD authentication=E2=80=9D than =E2=80=9CBFD authenticatio= n=E2=80=9D. The latter implies per-RFC5880 BFD authentication.
>
> >
> s/psuedo/pseudo/
>
> s/ scope of this draft/ sc= ope of this document/
>
> s/seuquence/sequence/
>
>= ;
>
> Not clear to me what the following means.
>
&g= t;                    &nbs= p;          Note: The first sequence number can
= >
>    be obtained using the same logic as the My Discri= minator value.
>
>
>
> The diagram reads well for= regular authentication. For secure sequence number, I think the diagram wou= ld gain clarity from an ordered list of steps on the sender and receiver. Th= e current list before the diagram is useful,  I believe the sender step= s would start at =E2=80=9CH1:=E2=80=9D and the receiver steps at hash=E2=80=99. And yes, hash=E2= =80=99 needs an explanation. On the receiver side, for validating that =E2=80=99s=E2=80=99 i= s a good sequence number, the range has to be checked as mentioned in the pr= evious paragraph.
>
>
>
> Section 5
>
&= gt; s/ stabiluty/ stability/
>
> s/admistratively/administrativ= ely/
>
> s/Sequential nature/The sequential nature/
>
> Date: Wed, 05 Aug 2020 16:28:55 -0700
> From: internet-drafts@ietf.org
= > To: i-d-announce= @ietf.org
> CC: = rtg-bfd@ietf.org
> Subject: I-D Action: draft-ietf-bfd-secure-sequ= ence-numbers-06.txt
>
>
> A New Internet-Draft is availa= ble from the on-line Internet-Drafts directories.
> This draft is a wo= rk item of the Bidirectional Forwarding Detection WG of the IETF.
> >         Title        &nb= sp;  : Secure BFD Sequence Numbers
>        &= nbsp;Authors         : Mahesh Jethanandani
>&= nbsp;                     =      Sonal Agarwal
>          =                  Ashesh Mishra<= br>>                   =        Ankur Saxena
>        =                    Alan De= Kok
>       Filename        : = draft-ietf-bfd-secure-sequence-numbers-06.txt
>      &n= bsp;Pages           : 6
>    &= nbsp;  Date            : 2020-08-05
&g= t;
> Abstract:
>    This document describes a securit= y enhancement for the sequence
>    number used in BFD contr= ol packets.  This document updates RFC 5880.
>
>
> = The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-bfd-secure-sequence-numbe= rs/
>
> There are also htmlized versions available at:
&= gt; https://tools.ietf.org/html/draft-ietf-bfd-secure-se= quence-numbers-06
> https://datatrac= ker.ietf.org/doc/html/draft-ietf-bfd-secure-sequence-numbers-06
> =
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfd-secure-seq= uence-numbers-06
>
>
> Please note that it may take = a couple of minutes from the time of submission
> until the htmlized v= ersion and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available= by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> >

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