July 2007 - Test - lists.nanog.org

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by None 12 Jul '07

12 Jul '07

f Date: Thu, 12 Jul 2007 16:17:32 -0700 From: David Meyer <dmm(a)1-4-5.net> To: nanog(a)nanog.org Cc: dino(a)cisco.com Subject: some musings on PI v. PA Message-ID: <20070712231732.GA17524(a)1-4-5.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="IS0zKkzwUGydFO0o" Content-Disposition: inline X-public-key: http://www.1-4-5.net/~dmm/public-key.asc X-gpg-fingerprint: 2409 8B50 B389 A307 BA5C 2A16 3918 03D6 A099 D8A7 X-philosophy: "I laugh and I cry, and I'm haunted by...Things I never meant nor wished to say" -- Bob Dylan, "When The Deal Goes Down" User-Agent: Mutt/1.5.13 (2006-08-11) Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090209.4696BCA8.0083:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 40 --IS0zKkzwUGydFO0o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I've been thinking about a benefit of PI addressing that I have not seen discussed on this list or others (at least recently). In particular, PI addressing enables a certain kind of "path selection" that might not be easy=20 (or possibly desirable) to retain in any of the the LOC/ID split schemes we have been discussing. This is in contrast to all of the standard reasons for wanting PI space (e.g., I don't want to renumber, ...). =20 Consider the following simple scenario: I'm a multihomed stub (I don't transit packets between my two upstreams). Further, I have PA delegations from each of my upstreams. Now, I'm corresponding with a remote site using addressing out of one of the PA blocks, call it X. Now, my link to the ISP aggregating X breaks. A packet destined for X will then travel very close to my site before learning that the link is down, possibly too far to be rerouted. And BTW, if I advertise X to my other upstream, then my advertisement of X has the same cost to the routing system as a PI advertisement (X is effectively PI). This problem is common to all (I think) of the schemes that seek to improve/optimize aggregatability in the core. For example: (a). In the 8+8/GSE case, the problem is that the packet will follow the RG in the src address all the way to the "end" of the path, that is, to the ISP that can forward it to the site. You don't learn that the site can't receive the packet until that point, and there is no way to reroute it. =20 (b). The situation is similar with PA space, since the fact that the link at the "end" of the path might be down is hidden in the aggregate. You don't learn this until you are close to the "end" of the path, and there may be no way to reroute the packet.=20 (c). The situation is similar for the map/encap schemes (e.g., LISP), since one of primary goals of map/encap is to enable better topological aggregation. =20 OTOH, if I announce PI space, "switching to the new path" is controlled by the announcement/withdrawal of the PI prefix, and can happen much closer to the source. So in this sense aggregation breaks a certain kind of "path selection". I think we all realize that there is no free lunch, and that this is a property (such as it is) of the fact that aggregation throws away information in the interest of computability (a standard technique).=20 So folks are using PI for reasons other than the well-known standard laundry list. In particular, advertising PI space can cause the "switch" to an alternate path during an outage to happen much closer to the source and some providers find this to be a desirable property. I am interested in hearing about anyone who is relying on this property of PI, or any other comments on what I've said above. Oh, and BTW, none of this to say that we shouldn't be moving forward with the various alternatives we've been discussing (e.g., 8+8/GSE, LISP, ...); quite the contrary. Rather, my question is really about revisiting assumptions, requirements, and tradeoffs.=20 Thnx, Dave --IS0zKkzwUGydFO0o Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (GNU/Linux) iD8DBQFGlraMORgD1qCZ2KcRApWxAJ4thXUsuh4TdnXy2LytbzK4mRCEmwCdEE8A fZicCEufrqixFXp0F1ZbxbA= =0Puq -----END PGP SIGNATURE----- --IS0zKkzwUGydFO0o--

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None
by None 12 Jul '07

12 Jul '07

pj306VStB0wybEWJRlCkn567O0jgwoVlC32nil56rSvaI+PMgHqshilvAA4hMKX5WamEVzKyTXMMpNDQ rl7emMULpFA9bSzgS1e+A=; Received: from [172.17.67.246] (unverified [12.104.158.98]) by mx0-b.inoc.net (build v7.5.2) with ESMTP id 127015704-1941382 for <nanog(a)nanog.org>; Thu, 12 Jul 2007 23:16:57 +0000 (UTC) Message-ID: <4696B668.2080807(a)inoc.net> Date: Thu, 12 Jul 2007 19:16:56 -0400 From: Robert Blayzor <rblayzor(a)inoc.net> Organization: INOC, LLC User-Agent: Thunderbird 2.0.0.4 (Windows/20070604) MIME-Version: 1.0 To: nanog(a)nanog.org Subject: Re: peter lothberg's mother slashdotted References: <12997.1184264272(a)sa.vix.com> <20070712133910.B8475(a)sprockets.gibbar d.org> <Pine.LNX.4.64.0707122342300.29164(a)uplift.swm.pp.se> <4696AB85.1030407@in oc.net> <Pine.LNX.4.64.0707130039220.29164(a)uplift.swm.pp.se> In-Reply-To: <Pine.LNX.4.64.0707130039220.29164(a)uplift.swm.pp.se> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A09020A.4696BBE6.0003:SCGAP167720,ss=1,fgs=0, Mikael Abrahamsson wrote: > I have to disagree, considering the amount of people I've had to convice > that this really is a single 50GHz wave using 40G per second over DWDM > system designed for 10G and that it was router > > "LC - optical amplification - LC" Well yes, the technology is quite cool, I'm not debating that. The fact that it works at his mothers house (residential) doesn't really have any significance. I don't think you have anyone out there debating against caping out the upper limits of bandwidth on what we can get over a single strand of glass. I look at this article and say "so what". Now you've gotten the packets to the house. Now what? Wait 10, 15 or 20 years while companies try to find ways to get content do you? 1500 HD channels, thats a lot of TV sets. You can have all the bandwidth you want, but but until there an actual use for 40Gbps at the home all you're going to have is the worlds fastest BitTorrent or on net porn PPV network. How practical is it really also that you need CRS-1 at the residence for this. I agree with Sean. Since for most people the line card alone costs more than the house. :-) -Robert

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by None 12 Jul '07

12 Jul '07

) by chopin.merit.edu (MOS 3.8.2-GA) with ESMTP id AFJ88688; Thu, 12 Jul 2007 19:13:53 -0400 (EDT) Received: from [66.117.52.128] (unknown [66.117.52.128]) by srv013.carpathiahost.net (Postfix) with ESMTP id 3509193780 for <nanog(a)merit.edu>; Thu, 12 Jul 2007 19:13:53 -0400 (EDT) Message-ID: <4696B59E.9040900(a)kl.net> Date: Thu, 12 Jul 2007 19:13:34 -0400 From: Kevin Loch <kloch(a)kl.net> User-Agent: Thunderbird 1.5.0.9 (X11/20070127) MIME-Version: 1.0 To: nanog <nanog(a)merit.edu> Subject: Re: TCP congestion References: <796919.42253.qm(a)web30811.mail.mud.yahoo.com> <922B68D8-BCB4-40B8-88 5A-2459BDFEDA34(a)muada.com> In-Reply-To: <922B68D8-BCB4-40B8-885A-2459BDFEDA34(a)muada.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, Iljitsch van Beijnum wrote: > How exactly are you going to get out-of-order packets over a single link? There is a once popular router that has been known to do that in some configurations due to multiple paths within the device. - Kevin

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by None 12 Jul '07

12 Jul '07

92.168.11.24]) by rip.psg.com with esmtpsa (SSLv3:AES256-SHA:256) (Exim 4.67 (FreeBSD)) (envelope-from <randy(a)psg.com>) id 1I97rh-0002qG-D5; Thu, 12 Jul 2007 23:14:29 +0000 Message-ID: <4696B5CE.2080506(a)psg.com> Date: Fri, 13 Jul 2007 08:14:22 +0900 From: Randy Bush <randy(a)psg.com> User-Agent: Thunderbird 2.0.0.4 (Windows/20070604) MIME-Version: 1.0 To: Mikael Abrahamsson <swmike(a)swm.pp.se> CC: nanog(a)nanog.org Subject: Re: peter lothberg's mother slashdotted References: <12997.1184264272(a)sa.vix.com> <20070712133910.B8475(a)sprockets.gibbar d.org> <Pine.LNX.4.64.0707122342300.29164(a)uplift.swm.pp.se> <4696AB85.1030407@in oc.net> <Pine.LNX.4.64.0707130039220.29164(a)uplift.swm.pp.se> In-Reply-To: <Pine.LNX.4.64.0707130039220.29164(a)uplift.swm.pp.se> X-Enigmail-Version: 0.95.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090203.4696BA74.0120:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO > I have to disagree, considering the amount of people I've had to convice > that this really is a single 50GHz wave using 40G per second over DWDM > system designed for 10G and that it was router which is, i believe, the point of the publicity stunt. unfortunately, it does not help with us needing 100GE and more in the pop where this stuff aggregates. and, for those who remember when peter did the similar stunt to make the POS point, let's hope cisco does not try to sell us a merlin-like hack to deal with it until the ieee gets off its butt. randy

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by None 12 Jul '07

12 Jul '07

h Microsoft SMTPSVC(6.0.3790.1830); Fri, 13 Jul 2007 00:14:59 +0100 Message-ID: <4696B55C.4090201(a)ukbroadband.com> Date: Fri, 13 Jul 2007 00:12:28 +0100 From: Leigh Porter <leigh.porter(a)ukbroadband.com> User-Agent: Thunderbird 2.0.0.4 (Macintosh/20070604) MIME-Version: 1.0 To: Philip Lavine <source_route(a)yahoo.com> CC: Stephen Wilcox <steve.wilcox(a)packetrade.com>, nanog <nanog(a)merit.edu> Subject: Re: TCP congestion References: <796919.42253.qm(a)web30811.mail.mud.yahoo.com> In-Reply-To: <796919.42253.qm(a)web30811.mail.mud.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 12 Jul 2007 23:14:59.0400 (UTC) FILETIME=[77BAE480:01C7C4 DA] Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A09020A.4696B969.0098:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 36 Come on folks, don't be afraid. We all know the beast is to blame for this, just don't say the name three times... Shub Internet Philip Lavine wrote: > I just don't understand how if there is 1 segment that gets lost how this coul d translate to such a catastrophic long period of slow-start. How can I minimize the impact of the inevitable segment loss/out of order over a WAN. Is QoS the only option? > > ----- Original Message ---- > From: Stephen Wilcox <steve.wilcox(a)packetrade.com> > To: Philip Lavine <source_route(a)yahoo.com> > Cc: nanog <nanog(a)merit.edu> > Sent: Thursday, July 12, 2007 1:09:24 PM > Subject: Re: TCP congestion > > Well, if its out of order its the same as if its lost or delayed, it needs to see that missing segment before the window is full > > As mentioned you need to get dumps from both ends, you will almost definitely find that you have packet loss which tripped tcp's slow start mechanism. > > Steve > > On Thu, Jul 12, 2007 at 12:02:49PM -0700, Philip Lavine wrote: > > >> Even if the segment was received out of order what would cause congestion avo idance to starve the connection of legitimate traffic for 15 to 20 seconds? That is the core of the problem. >> >> ----- Original Message ---- >> From: Fred Baker <fred(a)cisco.com> >> To: Brian Knoll <Brian.Knoll(a)tradingtechnologies.com> >> Cc: Philip Lavine <source_route(a)yahoo.com>; nanog <nanog(a)merit.edu> >> Sent: Thursday, July 12, 2007 11:56:06 AM >> Subject: Re: TCP congestion >> >> >> On Jul 12, 2007, at 11:42 AM, Brian Knoll ((TTNET)) wrote: >> >> >>> If the receiver is sending a DUP ACK, then the sender either never >>> received the first ACK or it didn't receive it within the timeframe it >>> expected. >>> >> or received it out of order. >> >> Yes, a tcpdump trace is the first step. >> >> >> >> >> >> >> _____________________________________________________________________________ _______ >> Be a better Globetrotter. Get better travel answers from someone who knows. Y ahoo! Answers - Check it out. >> http://answers.yahoo.com/dir/?link=list&sid=396545469 >> > > > ______________________________________________________________________________ ______ > Pinpoint customers who are looking for what you sell. > http://searchmarketing.yahoo.com/ >

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IEEE HSSG (was Re: peter lothberg's mother slashdotted)
by Mikael Abrahamsson 12 Jul '07

12 Jul '07

d.org> <Pine.LNX.4.64.0707122342300.29164(a)uplift.swm.pp.se> <4696AB85.1030407(a)inoc.net > <Pine.LNX.4.64.0707130039220.29164(a)uplift.swm.pp.se> <4696B5CE.2080506(a)psg.com> Organization: People's Front Against WWW MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090202.4696C007.0102:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 42 On Fri, 13 Jul 2007, Randy Bush wrote: > sell us a merlin-like hack to deal with it until the ieee gets off its > butt. I hope everybody tells their vendors that 100GE is of high importance for them. The IEEE HSSG seem to be bogged down by 40GE vs 100GE right now with some voicing very strongly that 40GE should be included together with 100GE goal, mostly from the fibre channel and server folks. If you want 100GE by 2009-2010, please read up at <http://www.ieee802.org/3/hssg/public/index.html> and voice your opinion either on the email list or via your vendors. -- Mikael Abrahamsson email: swmike(a)swm.pp.se

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by None 12 Jul '07

12 Jul '07

h ESMTP id sg74Lp1Ctm7x for <nanog(a)trapdoor.merit.edu>; Thu, 12 Jul 2007 19:02:13 -0400 (EDT) Received: from mozart.merit.edu (mozart.merit.edu [198.108.95.9]) by trapdoor.merit.edu (Postfix) with ESMTP id 238E14DF71 for <nanog(a)trapdoor.merit.edu>; Thu, 12 Jul 2007 19:01:56 -0400 (EDT) Received: from chopin.merit.edu (razorgate.merit.edu [198.108.95.8]) by mozart.merit.edu (MOS 3.8.2-GA) with ESMTP id AJW96365; Thu, 12 Jul 2007 19:03:38 -0400 (EDT) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.174]) by chopin.merit.edu (MOS 3.8.2-GA) with ESMTP id AFJ88202; Thu, 12 Jul 2007 19:03:37 -0400 (EDT) Received: by ug-out-1314.google.com with SMTP id 34so530412ugf for <nanog(a)nanog.org>; Thu, 12 Jul 2007 16:03:37 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject: cc:in-reply-to:mime-version:content-type:references; b=fW/koqRdgG7yOQfvrv1cgWZ0zIeDdjnHAahRZytZRNvqx3KErVRUYaEfXb3CeD7iiIW9UA VR4+no5dElE7Eqq7mUBOiscS4hkfPBUfRP6/ZZVYyYbF6vLG1Pj6T6oeIBQ3oj+avP7+2AR8nj01Xht8 hQvJHI/yZ3H6BpFT657nQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:c ontent-type:references; b=RP34t8gx4yENBmDhsF9soSVJ8bblu92M0SGDK6TeRkmIdvnRiwk9ogwZiCa3mJHNJXnJwi hrazXhYSOD68sKhwoxeEqNs3vkDutrnjffozEO0wYT6aZkeVEVJYFcbSELQQY78tdziQgnRjbY2CugON LHFADmBeYL3BNBVdqvyJQ= Received: by 10.78.97.7 with SMTP id u7mr326885hub.1184281416685; Thu, 12 Jul 2007 16:03:36 -0700 (PDT) Received: by 10.78.46.9 with HTTP; Thu, 12 Jul 2007 16:03:36 -0700 (PDT) Message-ID: <a193eb4d0707121603g40a3b95ib7cf5bb284873f90(a)mail.gmail.com> Date: Thu, 12 Jul 2007 19:03:36 -0400 From: "Steve Meuse" <smeuse(a)gmail.com> To: "Brandon Butterworth" <brandon(a)rd.bbc.co.uk> Subject: Re: peter lothberg's mother slashdotted Cc: nanog(a)nanog.org In-Reply-To: <200707122141.WAA06503(a)sunf10.rd.bbc.co.uk> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_19714_18376479.1184281416214" References: <200707122141.WAA06503(a)sunf10.rd.bbc.co.uk> Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090207.4696B5DD.006F:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 35 ------=_Part_19714_18376479.1184281416214 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline On 7/12/07, Brandon Butterworth <brandon(a)rd.bbc.co.uk> wrote: > > > > Wouldn't residential fiber be > > expected to radiate out from neighborhood break-out boxes, or at the > > longest from a central office in the middle of town, rather than having > > some central point where enough individual strands of fiber converged to > > serve everybody in a 2,000 kilometer radius? > > CRS-1 so expensive there'll only be one per country. > /so expensive/requires so much power/ -- -Steve ------=_Part_19714_18376479.1184281416214 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline <div>On 7/12/07, Brand on Butterworth <<a href="mailto:brandon@rd.bbc.co.uk">brandon(a)rd.bbc.co.u k</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px s olid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> > Wouldn't residential fiber be > expected to radiate out from neighborhood break-out boxes, or at the > longest from a central office in the middle of town, rather than having > some central point where enough individual strands of fiber converged to > serve everybody in a 2,000 kilometer radius? CRS-1 so expensive there'll only be one per country. </blockquote></div> /so expensive/re quires so much power/ -- -Steve ------=_Part_19714_18376479.1184281416214--

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by None 12 Jul '07

12 Jul '07

d.org> <Pine.LNX.4.64.0707122342300.29164(a)uplift.swm.pp.se> <4696AB85.1030407@in oc.net> Mime-Version: 1.0 (Apple Message framework v752.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <590D9BB5-8F82-4EEA-8C6A-E895766C13F5(a)multicasttech.com> Cc: Mikael Abrahamsson <swmike(a)swm.pp.se>, nanog(a)nanog.org Content-Transfer-Encoding: 7bit From: Marshall Eubanks <tme(a)multicasttech.com> Subject: Re: peter lothberg's mother slashdotted Date: Thu, 12 Jul 2007 18:52:25 -0400 To: Robert Blayzor <rblayzor(a)inoc.net> X-Mailer: Apple Mail (2.752.3) Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090202.4696B3D8.0056:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 34 On Jul 12, 2007, at 6:30 PM, Robert Blayzor wrote: > > Mikael Abrahamsson wrote: >> It's a demonstration of backbone technology, not really access >> technology. > > It's not even that. We all know that 40G technology exists today, > this article doesn't prove anything. On the contrary, I think that it proves again that Peter has a deep understanding of publicity. > How about they fling their magic wand some more and show us where > 40G to the residential marketplace is a viable business model. By > todays technology costs to make that happen and what the average > residential consumer pays, your ROI is about 20 years. ;-) > > -Robert Regards Marshall

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Re: peter lothberg's mother slashdotted
by Mikael Abrahamsson 12 Jul '07

12 Jul '07

d.org> <Pine.LNX.4.64.0707122342300.29164(a)uplift.swm.pp.se> <4696AB85.1030407(a)inoc.net > Organization: People's Front Against WWW MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: owner-nanog(a)merit.edu Precedence: bulk Errors-To: owner-nanog(a)merit.edu X-Loop: nanog X-Junkmail-Status: score=10/50, host=mozart.merit.edu X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A090205.4696B011.0045:SCGAP167720,ss=1,fgs=0, ip=198.108.1.26, so=2006-09-22 03:48:54, dmn=5.3.14/2007-05-31 Status: RO X-Status: X-Keywords: NonJunk X-UID: 33 On Thu, 12 Jul 2007, Robert Blayzor wrote: > It's not even that. We all know that 40G technology exists today, this > article doesn't prove anything. I have to disagree, considering the amount of people I've had to convice that this really is a single 50GHz wave using 40G per second over DWDM system designed for 10G and that it was router "LC - optical amplification - LC" with no transponders of any kind. I've sent the Cisco product link on IRC 4-5 times in channels populated by otherwise quite knowledgable people. Some didn't even know that LC existed even though it's been shipping for over a year. People have been under the impression that this was 4 10G waves, each using 50GHz. -- Mikael Abrahamsson email: swmike(a)swm.pp.se

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Re: peter lothberg's mother slashdotted
by Brandon Butterworth 12 Jul '07

12 Jul '07

> Wouldn't residential fiber be > expected to radiate out from neighborhood break-out boxes, or at the > longest from a central office in the middle of town, rather than having > some central point where enough individual strands of fiber converged to > serve everybody in a 2,000 kilometer radius? CRS-1 so expensive there'll only be one per country. brandon

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