Re: [netmod] rfc6991bis: loopback addresses
Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Thu, 30 July 2020 13:47 UTC
Return-Path: <j.schoenwaelder@jacobs-university.de>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E9DD33A1163 for <netmod@ietfa.amsl.com>; Thu, 30 Jul 2020 06:47:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
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 hhlHvgs0eGck for <netmod@ietfa.amsl.com>; Thu, 30 Jul 2020 06:47:19 -0700 (PDT)
Received: from atlas5.jacobs-university.de (atlas5.jacobs-university.de [212.201.44.20]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9E93C3A1152 for <netmod@ietf.org>; Thu, 30 Jul 2020 06:47:18 -0700 (PDT)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by atlas5.jacobs-university.de (Postfix) with ESMTP id B173D6F4; Thu, 30 Jul 2020 15:47:16 +0200 (CEST)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from atlas5.jacobs-university.de ([10.70.0.198]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10032) with ESMTP id Tbb61vpx3_3H; Thu, 30 Jul 2020 15:47:16 +0200 (CEST)
Received: from hermes.jacobs-university.de (hermes.jacobs-university.de [212.201.44.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hermes.jacobs-university.de", Issuer "DFN-Verein Global Issuing CA" (verified OK)) by atlas5.jacobs-university.de (Postfix) with ESMTPS; Thu, 30 Jul 2020 15:47:16 +0200 (CEST)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by hermes.jacobs-university.de (Postfix) with ESMTP id 59AED20154; Thu, 30 Jul 2020 15:47:16 +0200 (CEST)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from hermes.jacobs-university.de ([212.201.44.23]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10028) with ESMTP id ASHE1mySuUqP; Thu, 30 Jul 2020 15:47:15 +0200 (CEST)
Received: from localhost (anna.jacobs.jacobs-university.de [10.50.218.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by hermes.jacobs-university.de (Postfix) with ESMTPS id BADF2200E4; Thu, 30 Jul 2020 15:47:15 +0200 (CEST)
Date: Thu, 30 Jul 2020 15:47:15 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>
Cc: "Reshad Rahman (rrahman)" <rrahman@cisco.com>, tom petch <ietfc@btconnect.com>, "netmod@ietf.org" <netmod@ietf.org>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Message-ID: <20200730134715.otyb4e6uqjylszdg@anna.jacobs.jacobs-university.de>
Reply-To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
Mail-Followup-To: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>, "Reshad Rahman (rrahman)" <rrahman@cisco.com>, tom petch <ietfc@btconnect.com>, "netmod@ietf.org" <netmod@ietf.org>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
References: <20200717192556.63e7gfbbrn2qyqzo@anna.jacobs.jacobs-university.de> <AM6PR07MB52220AD16FAC337D4F89A674A07B0@AM6PR07MB5222.eurprd07.prod.outlook.com> <64A58592-5FD0-4752-8069-E59E62C3F699@cisco.com> <AM6PR07MB5222C7EC1927B652D7C7389DA07B0@AM6PR07MB5222.eurprd07.prod.outlook.com> <A27BF4C9-FD50-46C0-8D95-36BD778EBAC6@cisco.com> <7D333828-EF9E-4786-B820-5B4A29B37440@cisco.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Disposition: inline
In-Reply-To: <7D333828-EF9E-4786-B820-5B4A29B37440@cisco.com>
X-Clacks-Overhead: GNU Terry Pratchett
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/zxaM5YBBO83T4XllwlP_lTBts6g>
Subject: Re: [netmod] rfc6991bis: loopback addresses
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Jul 2020 13:47:21 -0000
Thanks for pointing to the definitions in draft-nainar-mpls-lsp-ping-yang. With that, your request is relatively clear now and the question the WG needs to answer is whether these types are common enough to warrant being part of inet-types, i.e., are there any other places where these types may be useful? /js On Thu, Jul 30, 2020 at 01:19:11PM +0000, Nagendra Kumar Nainar (naikumar) wrote: > Hi, > > As Reshad mentioned, RFC8029 uses internal host loopback address (127..0.0.0/8 range as defined in section 4.2.2.11 of RFC1812). The YANG module for LSP Ping (RFC8029) defined in draft-nainar-mpls-lsp-ping-yang is using this address and so we felt it will be good to have the same included in the right document. > > Thanks, > Nagendra > > On 7/20/20, 2:54 PM, "Reshad Rahman (rrahman)" <rrahman@cisco.com> wrote: > > Hi, > > I think what you're referring to is the use of "loopback interfaces". The loopback addresses Juergen was referring to do not belong to loopback interfaces. > > Regards, > Reshad. > > > On 2020-07-20, 11:30 AM, "tom petch" <ietfc@btconnect.com> wrote: > > From: Reshad Rahman (rrahman) <rrahman@cisco.com> > Sent: 20 July 2020 14:39 > > I don't understand the comment "...implementation choice of one manufacturer." > > <tp> > Go back to the early specifications of IPv4 routers and routing protocols, which are still the ones we use today, and loopback was a state into which an interface could be put, with a loop back in hardware or software, often used for testing. A router had a router id, a 32 bit number with no syntax. One major manufacturer conflated parts of this and created a virtual address or addresses which could be used to send and receive packets for the router, as opposed to an interface on the router, which had no physical manifestation; fine until they called it the loopback address(es) which, sadly, caught on and many people, included those writing IETF I-D think that the router id can only be such a routable address. Some even think that there can only be one such address on a box, as opposed to one for network management, one for the control plane and so on. Not so. > > Tom Petch. > > As for the details, see https://tools.ietf.org/html/draft-nainar-mpls-lsp-ping-yang-00 > > Regards, > Reshad. > > > On 2020-07-20, 4:47 AM, "netmod on behalf of tom petch" <netmod-bounces@ietf.org on behalf of ietfc@btconnect.com> wrote: > > I am not a fan of loopback seeing it as the implementation choice of one manufacturer. On the other hand, the IETF has defined documentation addresses which many if not most writers of examples for YANG modules seem unaware of so if we add anything, I would add those. > > Tom Petch > > From: netmod <netmod-bounces@ietf.org> on behalf of Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> > Sent: 17 July 2020 20:25 > > - There was a request to add types for loopback addresses > (127.0.0.0/8 and ::1/128). > > - This is related to an effort to define a YANG module for MPLS LSP > Ping (RFC 8029) but the details are unclear, i.e., what is exactly > needed and how such a type will be used and whether there is a > common need for types for loopback addresses. > > - Proposal: do not add such types at this point in time > > -- > Juergen Schoenwaelder Jacobs University Bremen gGmbH > Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany > Fax: +49 421 200 3103 <https://www.jacobs-university.de/> > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod > > > -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 <https://www.jacobs-university.de/>
- [netmod] rfc6991bis: loopback addresses Juergen Schoenwaelder
- Re: [netmod] rfc6991bis: loopback addresses tom petch
- Re: [netmod] rfc6991bis: loopback addresses Juergen Schoenwaelder
- Re: [netmod] rfc6991bis: loopback addresses tom petch
- Re: [netmod] rfc6991bis: loopback addresses Reshad Rahman (rrahman)
- Re: [netmod] rfc6991bis: loopback addresses Erik Auerswald
- Re: [netmod] rfc6991bis: loopback addresses tom petch
- Re: [netmod] rfc6991bis: loopback addresses Reshad Rahman (rrahman)
- Re: [netmod] rfc6991bis: loopback addresses Reshad Rahman (rrahman)
- Re: [netmod] rfc6991bis: loopback addresses Nagendra Kumar Nainar (naikumar)
- Re: [netmod] rfc6991bis: loopback addresses Nagendra Kumar Nainar (naikumar)
- Re: [netmod] rfc6991bis: loopback addresses Juergen Schoenwaelder
- Re: [netmod] rfc6991bis: loopback addresses Nagendra Kumar Nainar (naikumar)
- Re: [netmod] rfc6991bis: loopback addresses Kent Watsen
- Re: [netmod] rfc6991bis: loopback addresses Acee Lindem (acee)
- Re: [netmod] rfc6991bis: loopback addresses Qin Wu
- Re: [netmod] rfc6991bis: loopback addresses Acee Lindem (acee)
- Re: [netmod] rfc6991bis: loopback addresses Qin Wu
- Re: [netmod] rfc6991bis: loopback addresses tom petch
- Re: [netmod] rfc6991bis: loopback addresses tom petch