January 2005 - Test - lists.nanog.org

Re: Broken PMTUD for . + TLD servers, was: Re: Smallest Transit MTU
by Iljitsch van Beijnum 10 Jan '05

10 Jan '05

On 10-jan-05, at 1:54, Stephen J. Wilcox wrote: >> With a 296 byte MTU I don't get answers from >> (a|b|h|j).root-servers.net, *.gtld-servers.net, tld2.ultradns.net and >> some lesser-known ccTLD servers. > I thought 576 bytes was the minimum by way of largest initial packet > prior > to negotiating MSS must not exceed 576 bytes.. altho i guess that > doesnt > preclude fragmentation or pmtu? Hosts are expected to be able to handle 576 byte IP packets = be able to reconstruct packets of that size from fragments if they are behind a < 576 MTU. For a long time, the TCP MSS would default to 536 (576 - IP - TCP) or 512. However, there is no real requirement about the minimum link MTU apart from the 68 bytes in RFC 791. People often attribute a 296 byte MTU recommendation for slow links with header compression to RFC 1144. This isn't entirely unreasonable, but it's not explicitly in the text. In any case, doing PMTUD for UDP in IPv4 doesn't make much sense. And having the kernel set the DF bit and then expecting the application is completely wrong, as many UDP applications can't reduce their packet size, or can't do this without serious loss of functionality, and fragmentation at the source host also can't be controlled by applications.

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Re: Tracking spoofed routes?
by David Meyer 09 Jan '05

09 Jan '05

Kevin, >> I am seeking avenues to investigate a possible case of IP address spoofing. >> >> I've recently received complaints which suggest that in the recent >> past (but not right now), somebody may have announced a more specific >> prefix, effectively hijacking "unused" address space within our >> allocated range. >> >> As it happens, the address space is not unused, just not visible on >> the public Internet. >> >> >> I am aware of route reflectors and other options to manually review >> what prefixes are currently announced, but have not been able to find >> a *searchable* archive of historical data, either overall BGP tables >> or just "unusual" announcements. The closest thing I've found so far >> is Route Views (http://www.routeviews.org/) however there is no >> obvious way to search the (huge) archived data files for substring >> matches? We're involved in trying to build database front ends for the data so you can do just this sort of thing. But right now, we're a little stuck. One thing you might try is using BGPlay to watch what happens to your prefix. >> Alternately, are there any existing mechanisms for monitoring route >> announcements which can provide near real-time alerting when any >> prefixes within specific subnet ranges are announced? Not that I know of. You can log into route-views.routeviews.org and use the cli to watch it, but that is a manual process. Hope this helps, Dave

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Measure overall network availability
by Joe Shen 07 Jan '05

07 Jan '05

Hi, is there any recommended method to measure overall network availability? Currently we use packet loss rate as indication of network availability, but to my understanding this just means the possiblity of e2e communication degrade but not the network availability. regards Joe __________________________________________________ Do You Yahoo!? Log on to Messenger with your mobile phone! http://sg.messenger.yahoo.com

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Da, Shrimp Daddy has invited you to open a Google mail account
by Shrimp Daddy 07 Jan '05

07 Jan '05

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RE: Network Operations Metrics
by Alan Hannan 07 Jan '05

07 Jan '05

Hi John, I think that folly never developed into anything. Pete may have better info. Best, Alan _____ From: john jones [mailto:jonesy@everestkc.net] Sent: Friday, January 07, 2005 6:42 AM To: alan(a)routingloop.com Cc: pete(a)kruckenberg.com; nanog(a)merit.edu Subject: Network Operations Metrics Alan and Pete, I am looking for some network metrics or industry averages and came across your thread of some time ago. You referenced some measurement metrics such as those listed below. I am looking for industry standards to look through and base some investigations on, do you know of any published key standards that are available to use in research and analysis? jonesy * Peering and Transit Cost * Peering and Transit Cost / bit * Revenue * Revenue/bit * Change Management Practices and Successes * Outages * Ave Uptime/Device by Type * Ave # Trouble Tickets / Time * Customer Turnips/Month * Customer Call hold times and call lengths * Peering BW * Peering Utilization * Average Backbone Circuit Utilization * Peak Backbone Circuit Utilization [maybe P95 of circuits, or top 20 busy] * Packet Loss and Latency within network * Packet Loss and Latency outside of network on Internet * Devices managed * # of employees required * Ave # of employees / device * Capex $$ / POP * Capex $$ / bit or bps * Traffic/Pop * dialup hold times * Ave Packet Size

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The Cidr Report
by cidr-report＠potaroo.net 07 Jan '05

07 Jan '05

This report has been generated at Fri Jan 7 21:44:26 2005 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 31-12-04 149554 102939 01-01-05 149661 102902 02-01-05 149622 102855 03-01-05 149526 102845 04-01-05 149642 102788 05-01-05 149521 102973 06-01-05 149566 103086 07-01-05 149489 103034 AS Summary 18628 Number of ASes in routing system 7618 Number of ASes announcing only one prefix 1404 Largest number of prefixes announced by an AS AS7018 : ATTW AT&T WorldNet Services 90130176 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'). --- 07Jan05 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 149494 102991 46503 31.1% All ASes AS18566 760 7 753 99.1% CVAD Covad Communications AS4134 828 196 632 76.3% CHINANET-BACKBONE No.31,Jin-rong Street AS4323 826 233 593 71.8% TWTC Time Warner Telecom AS721 1099 669 430 39.1% DNIC DoD Network Information Center AS27364 442 46 396 89.6% ARMC Armstrong Cable Services AS22773 418 24 394 94.3% CXA Cox Communications Inc. AS6197 819 445 374 45.7% BNS-14 BellSouth Network Solutions, Inc AS7843 481 107 374 77.8% ADELPH-13 Adelphia Corp. AS7018 1404 1052 352 25.1% ATTW AT&T WorldNet Services AS6478 469 148 321 68.4% ATTW AT&T WorldNet Services AS17676 388 69 319 82.2% JPNIC-JP-ASN-BLOCK Japan Network Information Center AS1239 931 623 308 33.1% SPRN Sprint AS9929 346 41 305 88.2% CNCNET-CN China Netcom Corp. AS22909 419 117 302 72.1% CMCS Comcast Cable Communications, Inc. AS4766 544 274 270 49.6% KIXS-AS-KR Korea Telecom AS21502 272 3 269 98.9% ASN-NUMERICABLE NUMERICABLE is a cabled network in France, AS14654 263 7 256 97.3% WAYPOR-3 Wayport AS9443 366 121 245 66.9% INTERNETPRIMUS-AS-AP Primus Telecommunications AS6140 376 133 243 64.6% IMPSA ImpSat AS4355 302 66 236 78.1% ERSD EARTHLINK, INC AS2386 843 611 232 27.5% ADCS-1 AT&T Data Communications Services AS9583 582 352 230 39.5% SIFY-AS-IN Sify Limited AS25844 244 17 227 93.0% SASMFL-2 Skadden, Arps, Slate, Meagher & Flom LLP AS6198 446 224 222 49.8% BNS-14 BellSouth Network Solutions, Inc AS4814 226 6 220 97.3% CHINA169-BBN CNCGROUP IP network¡ªChina169 Beijing Broadband Network AS3602 316 111 205 64.9% SPCA Sprint Canada Inc. AS15270 240 35 205 85.4% PDP-14 PaeTec.net -a division of PaeTecCommunications, Inc. AS22291 290 86 204 70.3% CC04 Charter Communications AS5668 427 235 192 45.0% CIH-12 CenturyTel Internet Holdings, Inc. AS6517 309 124 185 59.9% YIPS Yipes Communications, Inc. Total 15676 6182 9494 60.6% Top 30 total Possible Bogus Routes 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 64.17.32.0/24 AS5024 BRIDGE-75 BridgeNet, LC 64.17.33.0/24 AS5024 BRIDGE-75 BridgeNet, LC 64.17.37.0/24 AS5024 BRIDGE-75 BridgeNet, LC 64.46.27.0/24 AS8674 NETNOD-IX Netnod Internet Exchange Sverige AB 64.57.160.0/19 AS3561 SAVVI-3 Savvis 64.92.128.0/19 AS3561 SAVVI-3 Savvis 64.127.0.0/18 AS7018 ATTW AT&T WorldNet Services 64.209.192.0/18 AS3561 SAVVI-3 Savvis 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 ELISA-AS Elisa Oyj 192.40.105.0/24 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System 192.44.0.0/19 AS702 AS702 MCI EMEA - Commercial IP service provider in Europe 192.70.164.0/24 AS25689 NRCC-2 National Research Council of Canada 192.81.182.0/24 AS719 ELISA-AS Elisa Oyj 192.81.183.0/24 AS719 ELISA-AS Elisa Oyj 192.81.184.0/24 AS719 ELISA-AS 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 192.153.144.0/21 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 192.200.100.0/24 AS7018 ATTW AT&T WorldNet Services 196.2.95.0/24 AS8668 TELONE-AS TelOne Zimbabwe P/L 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. 198.163.155.0/24 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 198.206.48.0/21 AS701 UU UUNET Technologies, Inc. 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 360NE-1 360Networks (USA) Inc. 199.96.46.0/24 AS19092 360NE-1 360Networks (USA) Inc. 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 AS3541 DISAUN DISA/UNRRA 199.114.136.0/24 AS27044 DNIC DoD Network Information Center 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 AS27033 DNIC DoD Network Information Center 199.114.154.0/24 AS1733 ADP-41 AF DDN PMO 199.114.156.0/24 AS27034 DNIC DoD Network Information Center 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. 202.72.240.0/20 AS24320 202.73.128.0/22 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd. 202.93.0.0/20 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street 202.148.32.0/20 AS17495 GATEWAY-AP BROADBAND WIRELESSS INTERNET SERVICE PROVIDER 202.164.224.0/19 AS7599 IPXC-AS-AP IP Exchange 203.32.4.0/23 AS7617 TELEONE-HK TeleTeleOne (HK) Limited 203.62.0.0/17 AS7572 AARNET-ACT-RNO Australian Academic and Reasearch Network (AARNet) 203.99.0.0/19 AS17746 ORCONINTERNET-NZ-AP Orcon Internet 203.170.14.0/23 AS6648 ASN-SKYINTERNET Autonomous System Number peering of Sky Internet - BAYANTEL Inc. - Philppines 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. 205.150.0.0/15 AS701 UU UUNET Technologies, Inc. 206.29.168.0/21 AS10248 IPI Internet Partners, Inc. 206.128.104.0/21 AS11709 VIIN VIRTUAL INTERACTIVE CENTER 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 207.231.96.0/19 AS11194 NUNETI NuNet Inc 208.81.187.0/24 AS19194 SNL-8 Sentris Network LLC 208.138.48.0/20 AS7955 SOURCE-48 SourceNet Corporation 209.17.80.0/24 AS32272 CLEAR-17 ClearSkye Communications Inc 209.27.51.0/24 AS14132 INTERN-582 Internet Gateway Inc. 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 209.213.48.0/24 AS10629 INS-52 Inter-Pacific Network Services 209.213.49.0/24 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 216.145.156.0/24 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 216.145.184.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.185.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.186.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.187.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.188.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.189.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.190.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.191.0/24 AS10758 INWAVE INWave Internet, Inc 216.145.200.0/21 AS20304 JIS-32 JVLNET Internet Services 216.171.96.0/20 AS3356 LEVEL3 Level 3 Communications 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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ip swip look up
by Blake L. Smith - XtremeBandwidth.com, Inc. 06 Jan '05

06 Jan '05

Any one know of a tool to look up how many IPs are SWIPd to a company. i.e. I would like to know the IPs I have SWIPd with my company name? Thanks in advance! Best Wishes, Blake L. Smith XtremeBandwidth.com, Inc. 949-330-6400 Office 949-606-7100 Fax www.XtremeBandwidth.com

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Re: soliciting agenda topics for the sunday night meeting
by Paul Vixie 06 Jan '05

06 Jan '05

> is this at the rio? if so which conf. room? i refer of course to <http://www.nanog.org/mtg-0501/coordination.html>, although there is really only one steve feldman and he does not work for verisign. martin hannigan, missing from the list of speakers/moderators as of this moment, actually does work for verisign. anyway, it's betty's party and so she'll also speak and moderate, but we need a more inclusive agenda than the three points shown at the above url. therefore i shall repeat: > | anybody else got anything else? send to martin, myself, both of us, or > | the nanog@ mailing list if you want to put something on the sunday night > | agenda. except, you can also send to steve feldman (the c|net one not the verisign one) if you'd like something added to the agenda for sunday night. and no, i don't know if it's at the rio or in what conference room. but i'm very sure that there will be signs near the registration area and/or terminal room and/or noc area, so wander around, you're sure to find us.

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RE: Proposed list charter/AUP change?
by Hannigan, Martin 05 Jan '05

05 Jan '05

The changes that people are discussing have little to do with "what is" and "what isn't" on topic for the NANOG mailing list. What it does have lots to do with is cooperating on examination of the moderation and testing the current long-standing techniques to determine if they need to be re-vamped to reflect sentiments of the community at large. To me, it's not a productive effort to micro-manage(or MERIT) the list via the FAQ. The FAQ is a traditional and historically acceptable method of answering questions that are bound to come up repeatedly as a primary result of new participants from any source. I am interested in discussing the possibilities of self-policing the list. An example would be when I suggested you earn some stripes. I said it. You ignored it. I opened my killfile. You land on it. That's much simpler. Writing complicated rules and creating a Politburo-like atmosphere is in no-ones interest. ObOp: Abuse desks are easily confused with SPAM since the context of abuse desk discussion is typically wrt ...SPAM. The earlier email was more general, IMHO. -M< -- Martin Hannigan (c) 617-388-2663 VeriSign, Inc. (w) 703-948-7018 Network Engineer IV Operations & Infrastructure hannigan(a)verisign.com > -----Original Message----- > From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of > Bill Nash > Sent: Tuesday, January 04, 2005 12:51 PM > To: Steve Sobol > Cc: Susan Harris; nanog(a)merit.edu; Betty Burke > Subject: Proposed list charter/AUP change? > > > > On Mon, 3 Jan 2005, Steve Sobol wrote: > > Susan keeps on claiming spam is offtopic for Nanog, yet the > AUP/Charter/FAQ > > don't mention spam other than telling us not to ask "I'm > being spammed, how > > can I make it stop?" > > > > If it's flat-out offtopic, no matter what, or if the > majority of list members > > don't want to talk about it on the list, why hasn't the FAQ > been updated? Or > > does Merit just want us to try to guess what is offtopic? > > > > Spam represents a significant percentage of email traffic, and its > delivery is increasingly via trojaned dsl/broadband devices. > Even spam > delivered from quasi-legitimate sources is usually an abuse > of resources > that some NSP/ISP is paying for. Discussion of functional > spam control at > the ISP level, I think, is absolutely on topic for a list of > this scope. > Please note, that I say 'functional'. Random complaints would > obviously > not fall into this category. > > Examples would include: > Working enterprise-scale spam filtering (Hourly mail volume > measured in > thousands) > Discussion of edge/core SMTP filtering to curtail spam sources. > Policy discussions for handling domestic and international > spam sources. > Implementation, or requests for implementation, of SPF and similiar > controls. > Inter-network cooperation for handling large scale issues. > > I think this last is pretty much exactly what a list like > this is for, be > it spam, regional power outages, BGP shenanigans, or > widespread squirrel > detonations. > > - billn >

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soliciting agenda topics for the sunday night meeting
by Paul Vixie 05 Jan '05

05 Jan '05

so far Daniel Golding <dgolding(a)burtongroup.com> has asked for a slot to present a half dozen slides on what he calls a "nanog reform proposal", so the agenda for sunday night is: --- intro/overview martin hannigan 5 minutes & paul vixie (moderators) "reform proposal" dan golding 15 minutes (et al) --- anybody else got anything else? send to martin, myself, both of us, or the nanog@ mailing list if you want to put something on the sunday night agenda. -- paul vixie martin hannigan (moderators)

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