Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt
Rick Cornetti <cornetti@wg.com> Wed, 10 May 1995 14:37 UTC
Received: from ietf.nri.reston.va.us by IETF.CNRI.Reston.VA.US id aa04196; 10 May 95 10:37 EDT
Received: from CNRI.Reston.VA.US by IETF.CNRI.Reston.VA.US id aa04192; 10 May 95 10:37 EDT
Received: from ietf.cnri.reston.va.us by CNRI.Reston.VA.US id aa07520; 10 May 95 10:37 EDT
Received: from ietf.nri.reston.va.us by IETF.CNRI.Reston.VA.US id aa04164; 10 May 95 10:37 EDT
Received: from CNRI.Reston.VA.US by IETF.CNRI.Reston.VA.US id aa04160; 10 May 95 10:35 EDT
Received: from ncnoc.ncren.net by CNRI.Reston.VA.US id aa07429; 10 May 95 10:35 EDT
Received: from chaos.wg.com by ncnoc.ncren.net (5.65/tas-ncren/may94) id AA03340; Wed, 10 May 95 10:33:23 -0400
Received: from speedy.wg.com by wg.com (4.1/SMI-4.1) id AA02724; Wed, 10 May 95 10:33:19 EDT
Received: from rocky.looneytunes by speedy.wg.com (4.1/SMI-4.1) id AA25182; Wed, 10 May 95 10:33:39 EDT
Date: Wed, 10 May 1995 10:33:39 -0400
X-Orig-Sender: iplpdn-request@IETF.CNRI.Reston.VA.US
Sender: ietf-archive-request@IETF.CNRI.Reston.VA.US
From: Rick Cornetti <cornetti@wg.com>
Message-Id: <9505101433.AA25182@speedy.wg.com>
To: fred@cisco.com, jas@shiva.com
Subject: Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt
Cc: cbrown@wellfleet.com, carvalho@cisco.com, iplpdn@CNRI.Reston.VA.US
> > >Is missing one value, in my reckoning. ANSI T1.617a-1994 revises > >Annex D in an incompatible way. (Thanks, ANSI! The "element > >identifier" of "Link integrity verification information element" is > >changed from 0x19 to 0x03.) > > What idiot did that? Did they do anything useful with the protocol (tell > you the Bc/Be/throughput values, perhaps) that would justify implementing > it? > > No idea which idiot. The 20 "idiots" of working group T1S1.2 are > listed on page vii... > > > There is no change in the coding of this IE. My only guess is that > someone else in another ANSI working group allocated EI 0x19 in the > ANSI codeset (shift 5 in US), so that they had to resolve the > conflict. There's no conflict in T1.607-1990, the only codeset 5 EI > there is 0x1d for "operator system access IE". However, I don't have > ANSI T1.608, which also is noted to allocate EI's in codeset 5. > > I don't know why they stuck with codeset 5 here. So long as they were > changing it, they could have used the ITU-T EI of 0x93 in codeset 0. > > However, there is a meaningful change in the ANSI 1994 LMI. They > added a "delete" bit in the "PVC status" IE. However, they DIDN'T > change the EI for that, it's still 0x07 (codeset 5). Maybe that's why > they changed the other EI?! Strange way to flag the change!! > > > (acronyms: EI :== element identifier, IE :== information element). > > > Far as I know, most FR switches are still provisioned for Interim LMI. > All these other ones are just a nuisance to implementors, adding no > value over Interim LMI. Still, some fool will setup a network > somewhere with the ANSI 1994 one, then it's back to the grindstone... > > Remember, it could be worse, we could be writing the 50 flavors of > full ISDN call control (DSS1), with codesets 5, 6, and 7, different on > every switch vendor in every country in every operating authority! > I noted this discrepancy too. Here is the response from the frame relay list: ----- Begin Included Message ----- From owner-frame-relay@stone.ucs.indiana.edu Mon Jan 9 12:43:55 1995 Date: Mon, 9 Jan 95 09:25:00 PST From: art@doelztc.timeplex.com (Art Biesiada) Subject: FR: RE: Annex D LIV IE -- which is correct To: frame-relay@stone.ucs.indiana.edu Sender: owner-frame-relay@stone.ucs.indiana.edu Reply-To: comp.dcom.frame-relay@indiana.edu X-Info1: submissions to comp.dcom.frame-relay@indiana.edu X-Info2: [Un]Subscribe requests to frame-relay-request@indiana.edu X-Info3: example- unsubscribe frame-relay somebody@somewhere.com X-Info4: archives (soon to be announced) Content-Length: 697 I have a copy of ANSI T1-617a-1994, where it states on page 6: "In D.3.2, change Link integrity verification information element identifier from "00011001" to "00000011" ... So the correct ID is 0x03. Art Biesiada Ascom Timeplex > Author: NAME: cornetti@wg.com <SYS30::INTERNET::cornetti@wg.com> > > I have detected a discrepancy in T1.617 Annex D in the > Link Integrity Verification IE. > > In T1.617 "Draft for T1 Default Ballot" (T1S1/91-352), > the LIV IE ID (octet 1) is shown as 0x03. In the published > ANSI T1.617-1991, Annex D, the LIV IE ID is shown as 0x19. > > Which is correct? > > Thanks in advance. > > Rick Cornetti > Wandel & Goltermann, Inc. > RTP, NC, USA, 27709 ----- End Included Message ----- So it appears that there was a "typo" in ANSI T1.617-1991, Annex D and that ANSI fixed it in the 1994 version. Regards, Rick Cornetti Network Systems Wandel & Goltermann RTP, NC, USA
- comments on draft-ietf-iplpdn-frmib-dte-04.txt John Shriver
- Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt Fred Baker
- Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt John Shriver
- Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt Rick Cornetti
- Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt Caralyn Brown
- Re: comments on draft-ietf-iplpdn-frmib-dte-04.txt Fred Baker