August 2004 - Test - lists.nanog.org

The Cidr Report
by cidr-report＠potaroo.net 06 Aug '04

06 Aug '04

This report has been generated at Fri Aug 6 21:43:33 2004 AEST. The report analyses the BGP Routing Table of an AS4637 (Reach) router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org/as4637 for a current version of this report. Recent Table History Date Prefixes CIDR Agg 30-07-04 139803 96247 31-07-04 139994 96285 01-08-04 140090 96273 02-08-04 140060 96314 03-08-04 140246 96257 04-08-04 140341 96303 05-08-04 140243 96381 06-08-04 140324 96516 AS Summary 17654 Number of ASes in routing system 7205 Number of ASes announcing only one prefix 1385 Largest number of prefixes announced by an AS AS7018 : ATTW AT&T WorldNet Services 85289216 Largest address span announced by an AS (/32s) AS721 : DNIC DoD Network Information Center Aggregation Summary The algorithm used in this report proposes aggregation only when there is a precise match using the AS path, so as to preserve traffic transit policies. Aggregation is also proposed across non-advertised address space ('holes'). --- 06Aug04 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 140438 96527 43911 31.3% All ASes AS6347 951 103 848 89.2% SAVV SAVVIS Communications Corporation AS18566 700 9 691 98.7% CVAD Covad Communications AS4134 767 171 596 77.7% CHINANET-BACKBONE No.31,Jin-rong Street AS4323 767 210 557 72.6% TWTC Time Warner Telecom AS7018 1385 958 427 30.8% ATTW AT&T WorldNet Services AS7843 514 129 385 74.9% ADELPH-13 Adelphia Corp. AS6197 743 378 365 49.1% BNS-14 BellSouth Network Solutions, Inc AS701 1279 924 355 27.8% UU UUNET Technologies, Inc. AS9583 514 171 343 66.7% SATYAMNET-AS Satyam Infoway Ltd., AS22773 392 68 324 82.7% CXAB Cox Communications Inc. Atlanta AS6467 353 32 321 90.9% ACSI e.spire Communications, Inc. AS22909 358 39 319 89.1% CMCS Comcast Cable Communications, Inc. AS1239 951 637 314 33.0% SPRN Sprint AS27364 350 36 314 89.7% ARMC Armstrong Cable Services AS17676 339 37 302 89.1% JPNIC-JP-ASN-BLOCK Japan Network Information Center AS11172 347 50 297 85.6% Servicios Alestra S.A de C.V AS9929 326 31 295 90.5% CNCNET-CN China Netcom Corp. AS4355 380 99 281 73.9% ERSD EARTHLINK, INC AS6478 333 58 275 82.6% ATTW AT&T WorldNet Services AS9443 359 109 250 69.6% INTERNETPRIMUS-AS-AP Primus Telecommunications AS14654 253 10 243 96.0% WAYPOR-3 Wayport AS4766 506 271 235 46.4% KIXS-AS-KR Korea Telecom AS6198 449 216 233 51.9% BNS-14 BellSouth Network Solutions, Inc AS17633 238 6 232 97.5% CHINATELECOM-SD-AS-AP ASN for Shandong Provincial Net of CT AS25844 244 15 229 93.9% SASMFL-2 Skadden, Arps, Slate, Meagher & Flom LLP AS3356 883 667 216 24.5% LEVEL3 Level 3 Communications AS6140 369 154 215 58.3% IMPSA ImpSat AS6327 223 28 195 87.4% SHAWC-2 Shaw Communications Inc. AS5668 382 192 190 49.7% CIH-12 CenturyTel Internet Holdings, Inc. AS14824 277 103 174 62.8% NCC-105 NewSouth Communications Corp. Total 15932 5911 10021 62.9% Top 30 total Possible Bogus Routes 24.138.80.0/20 AS11260 AHSICHCL Andara High Speed Internet c/o Halifax Cable Ltd. 24.246.0.0/17 AS7018 ATTW AT&T WorldNet Services 24.246.38.0/24 AS25994 NPGCAB NPG Cable, INC 24.246.128.0/18 AS7018 ATTW AT&T WorldNet Services 64.46.4.0/22 AS11711 TULARO TULAROSA COMMUNICATIONS 64.46.12.0/24 AS7850 IHIGHW iHighway.net, Inc. 64.46.27.0/24 AS8674 NETNOD-IX Netnod Internet Exchange Sverige AB 64.46.34.0/24 AS3408 64.46.63.0/24 AS7850 IHIGHW iHighway.net, Inc. 64.83.96.0/19 AS22934 EBNI E Broadband Now Inc. 66.114.0.0/19 AS16526 BIRCHT Birch Telecom, Inc. 67.128.0.0/13 AS209 QWEST-4 Qwest 69.26.32.0/19 AS17307 VIRTEL-15 Virtela Communications 132.0.0.0/10 AS721 DNIC DoD Network Information Center 137.0.0.0/13 AS721 DNIC DoD Network Information Center 138.136.0.0/13 AS721 DNIC DoD Network Information Center 158.0.0.0/13 AS721 DNIC DoD Network Information Center 192.30.93.0/24 AS17757 HPAUS-AP HP Australia 192.30.94.0/24 AS17757 HPAUS-AP HP Australia 192.30.127.0/24 AS719 LANLINK Elisa Oyj 192.40.105.0/24 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System 192.43.230.0/24 AS4738 SAARDNET-AS South Australian Academic Research and Development Network 192.44.0.0/19 AS702 AS702 MCI EMEA - Commercial IP service provider in Europe 192.80.64.0/19 AS1 LVLT Level 3 Communications, Inc. 192.81.182.0/24 AS719 LANLINK Elisa Oyj 192.81.183.0/24 AS719 LANLINK Elisa Oyj 192.81.184.0/24 AS719 LANLINK Elisa Oyj 192.119.135.0/24 AS270 NASA National Aeronautics and Space Administration 192.124.252.0/22 AS680 DFN-IP service G-WiN 192.133.6.0/24 AS4004 GLOBALONE-EQUANT-UK Equant UK & Greece Autonomous System 192.135.50.0/24 AS7018 ATTW AT&T WorldNet Services 192.136.71.0/24 AS719 LANLINK Elisa Oyj 192.136.79.0/24 AS719 LANLINK Elisa Oyj 192.138.208.0/20 AS1 LVLT Level 3 Communications, Inc. 192.153.144.0/21 AS721 DNIC DoD Network Information Center 192.172.0.0/19 AS721 DNIC DoD Network Information Center 192.188.208.0/20 AS721 DNIC DoD Network Information Center 192.190.16.0/21 AS1 LVLT Level 3 Communications, Inc. 192.243.32.0/23 AS2044 PALINA Palin Aquisitions Inc. 198.23.26.0/24 AS4390 BELLAT-7 Bell Atlantic, Inc. 198.97.72.0/21 AS721 DNIC DoD Network Information Center 198.97.80.0/20 AS721 DNIC DoD Network Information Center 198.97.88.0/24 AS89 NUSC-1 Naval Underwater Systems Center 198.97.240.0/20 AS721 DNIC DoD Network Information Center 198.97.247.0/24 AS3475 DEPART-52 Department of the Navy 198.101.4.0/22 AS721 DNIC DoD Network Information Center 198.136.32.0/20 AS19329 MCBCC Martin County Board of County Commissioners 198.144.32.0/19 AS3998 CITY CityNet, Inc. 198.161.87.0/24 AS6539 GTGR GT Group Telecom Services Corp. 198.161.165.0/24 AS852 AGTA Telus Advanced Communications 198.163.155.0/24 AS684 MRN Manitoba Regional Network 198.167.0.0/16 AS7456 INS-51 Interhop Network SERVICES Inc. 198.167.163.0/24 AS15290 ACCA-2 Allstream Corp. Corporation Allstream 198.168.0.0/16 AS701 UU UUNET Technologies, Inc. 198.169.0.0/16 AS803 SASK SaskTel 198.232.133.0/24 AS23075 SKOTOS Skotos Tech, Inc 199.10.0.0/16 AS721 DNIC DoD Network Information Center 199.60.0.0/20 AS271 UBC-3 University of British Columbia 199.96.44.0/23 AS19092 TAMR Touch America 199.96.46.0/24 AS19092 TAMR Touch America 199.114.0.0/18 AS568 DISOUN DISO-UNRRA 199.114.0.0/21 AS721 DNIC DoD Network Information Center 199.114.128.0/18 AS721 DNIC DoD Network Information Center 199.114.130.0/24 AS721 DNIC DoD Network Information Center 199.114.132.0/24 AS721 DNIC DoD Network Information Center 199.114.134.0/24 AS1913 DLA-8 Defense Logistics Agency 199.114.136.0/24 AS1913 DLA-8 Defense Logistics Agency 199.114.138.0/24 AS721 DNIC DoD Network Information Center 199.114.140.0/24 AS3544 DISAUN DISA/UNRRA 199.114.142.0/24 AS721 DNIC DoD Network Information Center 199.114.144.0/24 AS721 DNIC DoD Network Information Center 199.114.148.0/24 AS721 DNIC DoD Network Information Center 199.114.150.0/24 AS721 DNIC DoD Network Information Center 199.114.152.0/24 AS1913 DLA-8 Defense Logistics Agency 199.114.154.0/24 AS1733 ADP-41 AF DDN PMO 199.114.156.0/24 AS1913 DLA-8 Defense Logistics Agency 199.114.160.0/24 AS1733 ADP-41 AF DDN PMO 199.120.32.0/19 AS16582 NXLI NEXTLEVEL INTERNET, INC. 199.121.0.0/16 AS721 DNIC DoD Network Information Center 199.123.0.0/18 AS721 DNIC DoD Network Information Center 199.123.16.0/20 AS721 DNIC DoD Network Information Center 199.123.80.0/21 AS721 DNIC DoD Network Information Center 199.189.32.0/19 AS7332 IQUEST IQuest Internet 199.197.8.0/22 AS21814 PARSON-18 Parsons Corp. 199.202.0.0/16 AS701 UU UUNET Technologies, Inc. 202.47.1.0/24 AS7491 PI-PH-AS-AP PI-PHILIPINES 202.70.28.0/24 AS4515 ERX-STAR Star Internet Services Ltd. 202.73.128.0/22 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd. 202.81.96.0/19 AS10113 DATAFAST-AP DATAFAST TELECOMMUNICATIONS LTD 202.81.109.0/24 AS7657 TIG-US-PAS-AP The Internet Group Limited 202.81.121.0/24 AS10113 DATAFAST-AP DATAFAST TELECOMMUNICATIONS LTD 202.93.0.0/20 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street 202.123.96.0/20 AS9288 COMCEN-AS-AP Com-Cen Pty Ltd 202.133.3.0/24 AS9335 CIP-JAPAN-AS-AP ATT IPlus 202.164.224.0/19 AS7599 IPXC-AS-AP IP Exchange 203.32.4.0/23 AS7617 203.62.0.0/17 AS7572 AARNET-ACT-RNO Australian Academic and Reasearch Network (AARNet) 203.84.145.0/24 AS4637 REACH Reach Network Border AS 203.84.146.0/24 AS4637 REACH Reach Network Border AS 203.84.192.0/19 AS17433 PHILWEB-AP PhilWeb.Com, Inc. 203.84.192.0/20 AS17433 PHILWEB-AP PhilWeb.Com, Inc. 203.84.208.0/20 AS17433 PHILWEB-AP PhilWeb.Com, Inc. 203.210.69.0/24 AS17536 PRODIGY-AS-AP Prodidgy Telecommunications 204.154.125.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc. 204.154.126.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc. 204.154.127.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc. 204.194.110.0/23 AS30653 EXOBI Exobit Networks Inc. 204.196.0.0/14 AS1 LVLT Level 3 Communications, Inc. 205.150.0.0/15 AS701 UU UUNET Technologies, Inc. 205.159.72.0/24 AS1660 ANSCOM-5 ANS Communications 206.167.57.0/24 AS376 RISQR-3 Reseau Interordinateurs Scientique Quebecois (RISQ) 206.191.64.0/18 AS15290 ACCA-2 Allstream Corp. Corporation Allstream 206.251.69.0/24 AS27429 TIL-33 Telesat International Ltd. 206.253.190.0/23 AS8123 POLYBA Polybase 207.231.96.0/19 AS11194 NUNETI NuNet Inc 208.81.187.0/24 AS19194 SNL-8 Sentris Network LLC 209.172.0.0/18 AS7770 TRTI Triton Technologies, Inc. 209.205.69.0/24 AS21578 Universidad autonoma de Bucaramanga 209.205.70.0/24 AS21578 Universidad autonoma de Bucaramanga 209.205.81.0/24 AS15066 SkyNet de Colombia S.A. 209.205.82.0/24 AS15066 SkyNet de Colombia S.A. 209.205.84.0/24 AS15066 SkyNet de Colombia S.A. 209.213.32.0/19 AS10629 INS-52 Inter-Pacific Network Services 209.213.50.0/24 AS10629 INS-52 Inter-Pacific Network Services 209.213.51.0/24 AS10629 INS-52 Inter-Pacific Network Services 209.213.55.0/24 AS10629 INS-52 Inter-Pacific Network Services 209.213.56.0/24 AS10629 INS-52 Inter-Pacific Network Services 209.251.0.0/19 AS11036 SISCOM-1 SISCOM, Inc 216.37.110.0/23 AS4264 CERFN California Education and Research Federation Network 216.96.128.0/18 AS7018 ATTW AT&T WorldNet Services 216.145.130.0/24 AS11937 TRXI TRX Inc. 216.145.132.0/24 AS11937 TRXI TRX Inc. 216.145.133.0/24 AS11937 TRXI TRX Inc. 216.145.134.0/24 AS11937 TRXI TRX Inc. 216.145.135.0/24 AS11937 TRXI TRX Inc. 216.145.156.0/24 AS20304 JIS-32 JVLNET Internet Services 216.145.158.0/24 AS20304 JIS-32 JVLNET Internet Services 216.145.176.0/21 AS20304 JIS-32 JVLNET Internet Services 216.145.177.0/24 AS20304 JIS-32 JVLNET Internet Services 216.145.178.0/24 AS20304 JIS-32 JVLNET Internet Services 216.145.184.0/21 AS10758 INWAVE INWave Internet, Inc 216.145.200.0/21 AS20304 JIS-32 JVLNET Internet Services 216.186.151.0/24 AS3356 LEVEL3 Level 3 Communications 216.186.152.0/21 AS3356 LEVEL3 Level 3 Communications 216.186.160.0/23 AS3356 LEVEL3 Level 3 Communications 216.186.164.0/22 AS3356 LEVEL3 Level 3 Communications 216.186.192.0/22 AS3356 LEVEL3 Level 3 Communications 216.186.198.0/23 AS3356 LEVEL3 Level 3 Communications 216.186.248.0/23 AS3356 LEVEL3 Level 3 Communications Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)merit.edu eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org swinog(a)swinog.ch

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hotmail admins?
by Mark Jeftovic 05 Aug '04

05 Aug '04

Does anyone know if MSN Hotmail <ip_block_notification(a)hotmail.com> is a manned box? We just replied there regarding an automated notification that they've blocked one of our hubs. If not, anyone know a hotmail admin contact? -mark -- Mark Jeftovic <markjr(a)easydns.com> Co-founder, easyDNS Technologies Inc. ph. +1-(416)-535-8672 ext 225 fx. +1-(416)-535-0237

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sms messaging without a net?
by Dan Hollis 05 Aug '04

05 Aug '04

Does anyone know of a way to send SMS messages without an internet connection? Having a network monitoring system send sms pages via email very quickly runs into chicken-egg scenario. How do you email a page to let the admins know their net has gone down. :-P AT&T shut down their TAP dialup late last year. The only method that comes to mind is to buy a GSM modem which has SMS messaging capability. Has anyone done this? -Dan

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Re: Reporting the state of an apparatus to a remote computer patented
by Eric Brunner-Williams in Portland Maine 05 Aug '04

05 Aug '04

so ... mark lottor's your-machine-room-is-melting thermo+modem circa 1990 is what? prior art?

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RE: BGP Redistribution question
by Michael Dell 05 Aug '04

05 Aug '04

Hi there The redistribution information you have set in BGP only redistributes routes *learnt* via OSPF into BGP. An alternative solution to using the network command in BGP would have been to use the "redistribute static" command from within the BGP process context. This would be similar to the redistribute static command you had set up within the OSPF context. The network command tells BGP to originate a route for that network whether or not such a route exists in the router's IP route table, which means it has no connection with the static IP route you defined. Hope that helps. Mike Dell Networking Protocols Group Data Connection Ltd Tel: +44 20 8366 1177 Fax: +44 20 8367 8501 E-mail: mike.dell(a)dataconnection.com Web: http://www.dataconnection.com -----Original Message----- From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of D Train Sent: 05 August 2004 16:09 To: nanog(a)nanog.org Subject: BGP Redistribution question While looking into a routing issue, I found that one of my routers wasn't passing one of my static routes, being redist into ospf into bgp, and not sure as to why. It has been a while since I have worked with BGP, so I am a little rusty. The solution was for me to add the following BGP network statement... network 10.86.8.0 mask 255.255.248.0. If statics are being redist info ospf, and ospf is basically being redist into bgp, why did I have to have the network statement. Why didn't it put it into BGP and pass it along? Here is the scenario: Router A: ip route 10.86.8.0 255.255.248.0 10.86.138.14 ATL--CR6513A#ping 10.86.138.14 success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms ATL -CR6513A#sh ip route 10.86.8.0 Routing entry for 10.86.8.0/21 Known via "static", distance 1, metric 0 Redistributing via ospf 1 Advertised by ospf 1 subnets bgp 2 Routing Descriptor Blocks: * 10.86.138.14 Route metric is 0, traffic share count is 1 ATL-CR6513A#sh ip ospf data ext 10.86.8.0 OSPF Router with ID (10.86.194.5) (Process ID 1) Type-5 AS External Link States Routing Bit Set on this LSA LS age: 898 Options: (No TOS-capability, DC) LS Type: AS External Link Link State ID: 10.86.8.0 (External Network Number ) Advertising Router: 10.86.194.2 LS Seq Number: 80000D87 Checksum: 0x3D49 Length: 36 Network Mask: /21 Metric Type: 2 (Larger than any link state path) TOS: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 LS age: 554 Options: (No TOS-capability, DC) LS Type: AS External Link Link State ID: 10.86.8.0 (External Network Number ) Advertising Router: 10.86.194.5 LS Seq Number: 80000D87 Checksum: 0x2B58 Length: 36 Network Mask: /21 Metric Type: 2 (Larger than any link state path) TOS: 0 Metric: 20 Forward Address: 0.0.0.0 External Route Tag: 0 ATL-CR6513A#sh ip bgp 10.86.8.0 BGP routing table entry for 10.86.0.0/16, version 1078065 Paths: (2 available, best #2, table Default-IP-Routing-Table) Multipath: eBGP Advertised to non peer-group peers: 10.1.2.9 1, (aggregated by 1 10.1.254.253) 10.1.2.9 from 10.1.2.9 (10.1.254.253) Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate, multipath 1, (aggregated by 1 10.1.254.252) 10.1.2.1 from 10.1.2.1 (10.1.254.252) Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate, multipath, best router ospf 1 redistribute static subnets router bgp 2 no synchronization network x.x.x.x network y.y.y.y network 10.86.8.0 mask 255.255.248.0 ***had to be added for this to work, but wasn't present before hand*** redistribute connected route-map OSPF-Links redistribute ospf 1 route-map WW-OSPF-Routes neighbor 10.1.2.1 remote-as 1 neighbor 10.1.2.1 advertisement-interval 1 neighbor 10.1.2.9 remote-as 1 neighbor 10.1.2.9 advertisement-interval 1 maximum-paths 2 no auto-summary route-map WW-OSPF-Routes permit 10 set metric-type internal This is I was seeing on my Upstream Core router: ATL -CR12406A#sh ip route 10.86.8.0 Routing entry for 10.86.0.0/16 Known via "bgp 1", distance 200, metric 0, type locally generated Routing Descriptor Blocks: * directly connected, via Null0 Route metric is 0, traffic share count is 1 AS Hops 0, BGP network version This is what I was seeing after I add the network statement: GAATL-WW1-CR12406A#sh ip bgp 10.86.8.0 BGP routing table entry for 10.86.8.0/21, version 2210556 Paths: (2 available, best #2, Advertisements suppressed by an aggregate.) Multipath: eBGP iBGP Not advertised to any peer 2 10.1.2.2 from 10.1.2.2 (10.86.194.5) Origin IGP, metric 0, localpref 100, valid, external, multipath 2 10.1.2.6 from 10.1.2.6 (10.86.194.2) Origin IGP, metric 0, localpref 100, valid, external, multipath, best __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail

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searching for high bandwidth
by Jeff Wheeler 05 Aug '04

05 Aug '04

Thank you to everyone that responded to my low-latency bandwidth question, and please if anyone else has a suggestion along that line please do respond to my last email! I'll compile the responses I get and post to the list in a few days. Anyway, I'm emailing now to request any information on sources that would help in searching for high bandwidth (meaning T3 or similar) providers. I already know about bandwidth.com (a broadbandreports.com affiliate) and through Google found nationwidebandwidth.com, but what else is there? How do you all figure out who to contact when shopping around for additional bandwidth? I'm searching for a provider in the Washington, D.C. area by the way, and currently our fractional T3 is provided by UUNet. I will of course be contacting them, also I've already contact Cogent based on someone's suggestion yesterday or the day before. -- Jeff Wheeler Postmaster, Network Admin US Institute of Peace

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Convention networks and viruses
by Sean Donelan 05 Aug '04

05 Aug '04

As NANOG has experienced during the last several meetings, in any network used by a large number of people, there will be a certain percentage of people which bring infected computers into the network. http://www.nytimes.com/2004/07/29/technology/circuits/29bost.html?pagewante… Wiring a Convention, Version 2004 By SETH SCHIESEL Published: July 29, 2004 [...] But data services have not been as solid. Many news organizations suffered intermittent breakdowns in Internet service, and on Tuesday evening the main press pavilion was offline for about 90 minutes. A spokesman for Verizon said the company deliberately caused the interruption as part of an effort to root out a more deep-seated network problem, which the company said appeared to have been caused by a virus carried by network devices provided by news organizations. In the interim, a handful of data lines provided by other companies, including AT&T, served as a backup.

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RE: Quick question.
by Michel Py 05 Aug '04

05 Aug '04

> Alexei Roudnev wrote: > We had 6509 which failed, because backplain failed (it can > not happen -:) but it happen) - iof course, no any 'dual > CPU dual power' could prevent it... Image broken line card > - it can crash whole box no matter how much 'dual' things > you have. The same with software error (I crashed one of > 6509 just running 'snmpwalk' on it). I lost a 7507 dual power dual RSP earlier this year: one of the cards died, something in the power circuitry. It put the entire router in short-circuit, both power supplies decided to go south and would not power back up again until the faulty card was physically removed. After the card was removed it worked fine again. It does not happen often, but it does happen. Redundancy is not a slam dunk with IOS though; same as dCEF, don't expect RPR-compatible images to run every config you'll bump into, YMMV. There is an annoying number of things that are not working on RPR images of fall back to route cache instead of distributed cache. > So, I always prefer to have 2 boxes and application level > reliaility instead of playing with 'dual everything' > solutions (last example - 2 days ago one of our dual-power > Intel servers failed because of 1 power supply failure - > it did not broke, but it did something wrong''' and system > crashed...). Actually, what I try to do for routers is having a "dual everything" for production and an "el-cheapo eBay special" sitting in the same rack for backup. The reason I still do dual power and dual CPU is that over the last 20 years I have seen very little failures of redundant systems (although I have seen some) however a dual-something saved my bottom several times. That part of my body is priceless :-D For PCs I install dual Xeons on every production machine for example, even though the CPU power needed for some is a 486; Intel processors do die like anything else; a processor dying will typically lead to a system crash, but it does reboot in single-processor mode when the graveyard dude pushes the reset button. I also try do have RAID-10 arrays span over two raid cards; same as CPUs, a RAID card that dies will likely crash the system but it will reboot in degraded mode. Michel.

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Re: low-latency bandwidth for cheap?
by Robert Bonomi 05 Aug '04

05 Aug '04

> From owner-nanog(a)merit.edu Thu Aug 5 01:51:20 2004 > Date: Thu, 5 Aug 2004 08:47:43 +0200 (CEST) > From: Mikael Abrahamsson <swmike(a)swm.pp.se> > To: Jeff Wheeler <jwheeler(a)usip.org> > Cc: nanog(a)merit.edu > Subject: Re: low-latency bandwidth for cheap? > > > On Wed, 4 Aug 2004, Jeff Wheeler wrote: > > > Anybody know a good source for near-T1 low-latency bandwidth at around > > $100/month? I'm in the northern VA area btw. > > How much is "low latency"? I have 6ms RTT over my 8M/800k ADSL, it's > usually 6-8ms over an equivalent 2M g.shdsl line. > another datapoint: 768k SDSL. 10-11 msec RTT to my ISPs peering connections with other networks. end-to-end RTT of 14 ms, over twice the physical distance (a whopping 22 miles) compared to circa 9ms times to the same location(over 12 mi end-to-end) from a real T-1 local loop. Wire distance on the DSL is about 6k ft. The T-1 loop is less than 900 ft. Everything past that 'last mile' is T-3 or better. I can live with an added 5ms.

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RE: low-latency bandwidth for cheap?
by Joe Johnson 04 Aug '04

04 Aug '04

(I think it may be a little off topic, but the internet connection is usually part of network operations . . . ) There are some carrier grade fixed-point-wireless providers around that can offer really low latency (depending on distance). I'd offer you a solution, but we're in Illinois. There might be a pretty heavy front-end expense (usually around $500-$1000) but it is usually worth it. For the service you get. Joe Johnson Fox Valley Internet -----Original Message----- From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Jeff Wheeler Sent: Wednesday, August 04, 2004 4:26 PM To: nanog(a)merit.edu Subject: low-latency bandwidth for cheap? This may be the wrong forum to ask this, and if so I apologize, please just point me in the right direction! I'm getting somewhat frustrated with the instability and high latency of residential cable and DSL offerings, but I love the T1 or greater bandwidth they offer. I'd like reasonable bandwidth with low latency without spending hundreds of dollars per month! Anybody know a good source for near-T1 low-latency bandwidth at around $100/month? I'm in the northern VA area btw. -- Jeff Wheeler Postmaster, Network Admin US Institute of Peace

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