February 1998 - routing-wg - mailman.ripe.net

The Cidr Report
by Tony Bates 27 Feb '98

27 Feb '98

This is an auto-generated mail on Fri Feb 27 12:00:00 PST 1998 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to xara.net for giving me access to their routing tables once a day. Please send any comments about this report directly to me. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. ------------------------------------------------------------------------------ CIDR REPORT for 27Feb98 0) General Status Table History ------------- Date Prefixes 200298 49181 210298 49167 220298 49121 230298 49244 240298 49374 250298 49380 260298 49515 270298 49830 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 64.0.0.0 from AS7777 *** Bogus 65.0.0.0 from AS7777 *** Bogus 66.0.0.0 from AS7777 *** Bogus 67.0.0.0 from AS7777 *** Bogus 68.0.0.0 from AS7777 *** Bogus 69.0.0.0 from AS7777 *** Bogus 70.0.0.0 from AS7777 *** Bogus 71.0.0.0 from AS7777 *** Bogus 72.0.0.0 from AS7777 *** Bogus 73.0.0.0 from AS7777 *** Bogus 74.0.0.0 from AS7777 *** Bogus 75.0.0.0 from AS7777 *** Bogus 76.0.0.0 from AS7777 *** Bogus 77.0.0.0 from AS7777 *** Bogus 78.0.0.0 from AS7777 *** Bogus 79.0.0.0 from AS7777 *** Bogus 80.0.0.0 from AS7777 *** Bogus 81.0.0.0 from AS7777 *** Bogus 82.0.0.0 from AS7777 *** Bogus 83.0.0.0 from AS7777 *** Bogus 84.0.0.0 from AS7777 *** Bogus 85.0.0.0 from AS7777 *** Bogus 86.0.0.0 from AS7777 *** Bogus 87.0.0.0 from AS7777 *** Bogus 88.0.0.0 from AS7777 *** Bogus 89.0.0.0 from AS7777 *** Bogus 90.0.0.0 from AS7777 *** Bogus 91.0.0.0 from AS7777 *** Bogus 92.0.0.0 from AS7777 *** Bogus 93.0.0.0 from AS7777 *** Bogus 94.0.0.0 from AS7777 *** Bogus 95.0.0.0 from AS7777 *** Bogus 96.0.0.0 from AS7777 *** Bogus 97.0.0.0 from AS7777 *** Bogus 98.0.0.0 from AS7777 *** Bogus 99.0.0.0 from AS7777 *** Bogus 100.0.0.0 from AS7777 *** Bogus 101.0.0.0 from AS7777 *** Bogus 102.0.0.0 from AS7777 *** Bogus 103.0.0.0 from AS7777 *** Bogus 104.0.0.0 from AS7777 *** Bogus 105.0.0.0 from AS7777 *** Bogus 106.0.0.0 from AS7777 *** Bogus 107.0.0.0 from AS7777 *** Bogus 108.0.0.0 from AS7777 *** Bogus 109.0.0.0 from AS7777 *** Bogus 110.0.0.0 from AS7777 *** Bogus 111.0.0.0 from AS7777 *** Bogus 112.0.0.0 from AS7777 *** Bogus 113.0.0.0 from AS7777 *** Bogus 114.0.0.0 from AS7777 *** Bogus 115.0.0.0 from AS7777 *** Bogus 116.0.0.0 from AS7777 *** Bogus 117.0.0.0 from AS7777 *** Bogus 118.0.0.0 from AS7777 *** Bogus 119.0.0.0 from AS7777 *** Bogus 120.0.0.0 from AS7777 *** Bogus 121.0.0.0 from AS7777 *** Bogus 122.0.0.0 from AS7777 *** Bogus 123.0.0.0 from AS7777 *** Bogus 124.0.0.0 from AS7777 *** Bogus 125.0.0.0 from AS7777 *** Bogus 126.0.0.0 from AS7777 *** Bogus 213.0.0.0/8 from AS7777 *** Bogus 214.0.0.0/8 from AS7777 *** Bogus 215.0.0.0/8 from AS7777 *** Bogus 216.0.0.0/8 from AS7777 *** Bogus 217.0.0.0/8 from AS7777 *** Bogus 218.0.0.0/8 from AS7777 *** Bogus 219.0.0.0/8 from AS7777 *** Bogus 220.0.0.0/8 from AS7777 *** Bogus 221.0.0.0/8 from AS7777 *** Bogus 222.0.0.0/8 from AS7777 *** Bogus 223.0.0.0/8 from AS7777 AS Summary ---------- Number of ASes in routing system: 3268 Number of ASes announcing only one prefix: 1551 (799 cidr, 752 classful) Largest number of cidr routes: 429 announced by AS3561 Largest number of classful routes: 1125 announced by AS701 1) Gains by aggregating at the origin AS level --- 27Feb98 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS2493 575 352 223 38.8% iSTAR Internet, Inc. AS4293 426 223 203 47.7% IMCI AS816 604 432 172 28.5% UUNET Canada (ASN-UUNETCA-AS4) AS701 1125 961 164 14.6% Alternet AS174 798 637 161 20.2% Performance Systems International AS3602 459 306 153 33.3% Sprint Canada Inc. AS3749 198 55 143 72.2% TECNET AS3751 125 48 77 61.6% SNET-AS AS1221 419 342 77 18.4% AARNET-AS AS5668 110 38 72 65.5% Century Telephone Inc. AS3804 203 141 62 30.5% Bell Solutions AS3221 93 33 60 64.5% EENet Autonomous System AS1239 582 523 59 10.1% SprintLink Backbone AS271 112 56 56 50.0% BCnet Backbone AS3464 117 63 54 46.2% Alabama Research and Education Ne AS549 211 162 49 23.2% ONet Backbone AS72 84 36 48 57.1% Schlumberger Information Network AS4763 128 80 48 37.5% Telstra New Zealand AS7046 133 89 44 33.1% UUNET-CUSTOMER AS6181 66 22 44 66.7% FUSE-NET AS4755 76 32 44 57.9% Videsh Sanchar Nigam Ltd. India AS3561 886 844 42 4.7% MCI AS2711 97 55 42 43.3% SUNBELT-AS AS10722 73 31 42 57.5% Aluminum Co. of America AS852 157 117 40 25.5% AGT Advance Communication AS6335 63 23 40 63.5% NTRNET AS4740 345 306 39 11.3% ASN-OZEMAIL (Ozemail Pty Ltd) AS3493 166 127 39 23.5% INTERLINK AS1 782 743 39 5.0% BBNPLANET AS719 437 400 37 8.5% LANLINK autonomous system For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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New Document available: RIPE-178
by RIPE NCC Document Annoucement Service 24 Feb '98

24 Feb '98

New/Revised RIPE Document Announcement -------------------------------------- A revised/new document is available from the RIPE document store. Ref: ripe-178 Title: RIPE Routing-WG Recommendation for coordinated route-flap damping parameters Author: Tony Barber, Sean Doran, Daniel Karrenberg, Christian Panigl, Joachim Schmitz Date: 5 february 1998 Format: PS=206079 TXT=31015 Obsoletes: Obsoleted by: Updates: Updated by: See also: Short content description ------------------------- This paper recommends a set of route-flap damping parameters which should be applied by all ISPs in the Internet and should be deployed as new default values by BGP router vendors. Accessing the RIPE document store --------------------------------- The RIPE document store is available via anonymous FTP to ftp.ripe.net, in the directory ripe/docs. The URLs for the new documents on the FTP-server are: ftp://ftp.ripe.net/ripe/docs/ripe-178.ps PostScript version ftp://ftp.ripe.net/ripe/docs/ripe-178.txt plain text version You can also access the RIPE documents in HTML format via WWW. RIPE-178 is not available from the WWW at this moment, but will be soon, at the following URL: http://www.ripe.net/docs/ripe-178.html Documents can also be retrieved from the RIPE document store using a mail server program. For more information on how to use the program, send email to <mail-server(a)ripe.net> with "send HELP" in the body text.

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New Document available: RIPE-178
by RIPE NCC Document Annoucement Service 23 Feb '98

23 Feb '98

New/Revised RIPE Document Announcement -------------------------------------- A revised/new document is available from the RIPE document store. Ref: ripe-178 Title: RIPE Routing-WG Recommendation for coordinated route-flap damping parameters Author: Tony Barber, Sean Doran, Daniel Karrenberg, Christian Panigl, Joachim Schmitz Date: 5 february 1998 Format: PS=206079 TXT=31015 Obsoletes: Obsoleted by: Updates: Updated by: See also: Short content description ------------------------- This paper recommends a set of route-flap damping parameters which should be applied by all ISPs in the Internet and should be deployed as new default values by BGP router vendors. Accessing the RIPE document store --------------------------------- The RIPE document store is available via anonymous FTP to ftp.ripe.net, in the directory ripe/docs. The URLs for the new documents on the FTP-server are: ftp://ftp.ripe.net/ripe/docs/ripe-178.ps PostScript version ftp://ftp.ripe.net/ripe/docs/ripe-178.txt plain text version You can also access the RIPE documents in HTML format via WWW. RIPE-178 is not available from the WWW at this moment, but will be soon, at the following URL: http://www.ripe.net/docs/ripe-178.html Documents can also be retrieved from the RIPE document store using a mail server program. For more information on how to use the program, send email to <mail-server(a)ripe.net> with "send HELP" in the body text.

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The Cidr Report
by Tony Bates 20 Feb '98

20 Feb '98

This is an auto-generated mail on Fri Feb 20 12:00:00 PST 1998 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to xara.net for giving me access to their routing tables once a day. Please send any comments about this report directly to me. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. ------------------------------------------------------------------------------ CIDR REPORT for 20Feb98 0) General Status Table History ------------- Date Prefixes 050298 49484 140298 49400 150298 49226 160298 49509 170298 49589 180298 49307 190298 49418 200298 49181 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 3244 Number of ASes announcing only one prefix: 1560 (801 cidr, 759 classful) Largest number of cidr routes: 441 announced by AS3561 Largest number of classful routes: 1074 announced by AS701 1) Gains by aggregating at the origin AS level --- 20Feb98 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS2493 707 435 272 38.5% iSTAR Internet, Inc. AS6235 525 261 264 50.3% Intermedia Communications, Inc. AS4293 434 210 224 51.6% IMCI AS816 585 420 165 28.2% UUNET Canada (ASN-UUNETCA-AS4) AS3602 458 305 153 33.4% Sprint Canada Inc. AS174 775 627 148 19.1% Performance Systems International AS3749 198 55 143 72.2% TECNET AS701 1074 950 124 11.5% Alternet AS3751 125 48 77 61.6% SNET-AS AS5668 109 37 72 66.1% Century Telephone Inc. AS3804 204 142 62 30.4% WORLDLINX AS1239 590 528 62 10.5% SprintLink Backbone AS3221 92 32 60 65.2% EENet Autonomous System AS271 112 56 56 50.0% BCNET-AS AS3464 121 66 55 45.5% Alabama Research and Education Ne AS72 84 36 48 57.1% Schlumberger Information Network AS1221 263 215 48 18.3% AARNET-AS AS549 205 158 47 22.9% ONET-AS AS4755 78 34 44 56.4% Videsh Sanchar Nigam Ltd. India AS2711 98 55 43 43.9% SUNBELT-AS AS7046 131 89 42 32.1% UUNET-CUSTOMER AS3561 883 842 41 4.6% MCI AS852 157 117 40 25.5% CANET-ASN AS684 86 46 40 46.5% MBNET-AS AS6335 63 23 40 63.5% NTRNET AS4740 348 308 40 11.5% ASN-OZEMAIL (Ozemail Pty Ltd) AS1 789 749 40 5.1% BBNPLANET AS6181 63 24 39 61.9% FUSE-NET AS3493 166 128 38 22.9% INTERLINK AS719 432 395 37 8.6% LANLINK autonomous system For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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The Cidr Report
by Tony Bates 13 Feb '98

13 Feb '98

This is an auto-generated mail on Fri Feb 13 12:00:00 PST 1998 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to xara.net for giving me access to their routing tables once a day. Please send any comments about this report directly to me. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. ------------------------------------------------------------------------------ CIDR REPORT for 13Feb98 0) General Status Table History ------------- Date Prefixes 290198 50396 300198 50242 310198 49848 010298 49715 020298 49739 030298 49600 040298 49877 050298 49484 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 2407 Number of ASes announcing only one prefix: 718 (0 cidr, 718 classful) Largest number of cidr routes: 0 announced by Largest number of classful routes: 1044 announced by AS701 1) Gains by aggregating at the origin AS level --- 13Feb98 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS2493 691 368 323 46.7% iSTAR Internet, Inc. AS6235 495 252 243 49.1% Intermedia Communications, Inc. AS4293 430 210 220 51.2% IMCI AS174 874 673 201 23.0% Performance Systems International AS816 635 444 191 30.1% UUNET Canada (ASN-UUNETCA-AS4) AS3602 455 304 151 33.2% Sprint Canada Inc. AS3749 202 61 141 69.8% TECNET AS701 1044 931 113 10.8% Alternet AS3336 109 19 90 82.6% Internet Services, Kolumbus proje AS3751 125 48 77 61.6% SNET-AS AS5668 107 40 67 62.6% Century Telephone Inc. AS3804 204 142 62 30.4% WORLDLINX AS2048 154 92 62 40.3% LaNet AS1239 596 534 62 10.4% SprintLink Backbone AS3221 92 33 59 64.1% EENet Autonomous System AS1 840 782 58 6.9% BBNPLANET AS271 110 55 55 50.0% BCNET-AS AS719 519 468 51 9.8% LANLINK autonomous system AS549 214 163 51 23.8% ONET-AS AS3464 115 64 51 44.3% Alabama Research and Education Ne AS1221 263 214 49 18.6% AARNET-AS AS72 84 36 48 57.1% Schlumberger Information Network AS4763 128 80 48 37.5% Telstra New Zealand AS7545 114 69 45 39.5% TPG Internet Pty Ltd AS684 86 42 44 51.2% MBNET-AS AS4740 354 312 42 11.9% ASN-OZEMAIL (Ozemail Pty Ltd) AS2711 97 55 42 43.3% SUNBELT-AS AS7046 130 89 41 31.5% UUNET-CUSTOMER AS3561 897 857 40 4.5% MCI AS852 156 117 39 25.0% CANET-ASN For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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by up＠uplinkpro.com 12 Feb '98

12 Feb '98

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Re: DRAFT 2.0 of Route-Flap Dampening Paper, last call for comments
by Christian Panigl, ACOnet/UniVie 10 Feb '98

10 Feb '98

>Date: Sun, 8 Feb 1998 20:32:03 -0500 (EST) >From: Andrew Partan <asp(a)partan.com> > >I don't really have much of a problem with some 'golden' prefixes >but I think that you should put down some more of the reasoning >and background in the document. Hi Andrew, yeah, thanks, your question triggered another final-final update, which made it into the doc: ======================================================================= = 1.6. "Golden Networks" = = Even though damping is strongly recommended, in some cases = it may make sense to exclude certain networks or even individual = hosts from damping. This is especially true if damping would cut = of the access to vital infrastructure elements of the Internet. A most = prominent example are root nameservers. = = At least in principle, there should be enough redundancy for root = nameservers. Though, in fact we are still facing a situation where, at = least outside USA, large parts of the Internet are seeing all of them = through the same one or two backbone/upstream links (sea cable) and = any instability of those links which is triggering damping would = unnecessarily prolong the inaccessibility of the root nameservers for an = hour (at least those sitting in a /24 or longer prefix). Therefore we = decided to define those "golden networks". Probably we could remove the = exemptions for the A, D and H servers, which are sitting in a /16. We = might consider this for a new version of the recommendation. Our = recommendation is just dealing with a minimum set of "golden networks" = which of course might be extended by local decision. = = Still these must be exceptions resulting from strong needs - the rule = should be to apply coordinated route flap damping throughout. ======================================================================= >But please don't hold up this document just for this - getting the >rest of the stuff done - with global uniform deployment of dampening >is quite important. [For what its worth, Verio (AS 2914) deployed >your documented dampening parameters last week - we had been running >dampening with the cisco defaults prior to this.] Hey great news, thanks !!! Regards CP --- ---------------------------------------------------------------------- --- --- Christian Panigl : Vienna University Computer Center - ACOnet --- --- VUCC - ACOnet - VIX : -------------------------------------------- --- --- Universitaetsstrasse 7 : Mail: Panigl(a)CC.UniVie.ac.at (CP8-RIPE) --- --- A-1010 Vienna / Austria : Tel: +43 1 4277-14032 (Fax: -9140) --- --- ---------------------------------------------------------------------- ---

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Re: DRAFT 2.0 of Route-Flap Dampening Paper, last call for comments
by Christian Panigl, ACOnet/UniVie 09 Feb '98

09 Feb '98

>Date: Mon, 26 Jan 1998 21:02:14 -0500 (EST) >From: Andrew Partan <asp(a)partan.com> > >Can someone spell out a bit more the reason behind exempting the >routes that the root servers live in from being damped? Why should >they get special treatment? And why just them (and the rest of >the hosts that happen to live in those prefixes)? > >There are a lot of root servers; if you can't reach some of them, >so what? Hi Andrew, we've been through this a couple of times. You are perfectly right, that, at least in principle, there should be enough redundancy for root nameservers. Though, in fact we are still facing a situation where, at least outside USA, large parts of the Internet are seeing all of them through the same one or two backbone/upstream links (sea cable) and any instability of those links which is triggering damping would unnecessarily prolong the inaccessibility of the root nameservers for an hour (at least those sitting in a /24 or longer prefix). Therefore we decided to define those "golden networks". Probably we could remove the exemptions for the A, D and H servers, which are sitting in a /16. We might consider this for a new version of the recommendation. Our recommendation is just dealing with a minimum set of "golden networks" which of course might be extended by local decision. I'm now finishing the Version 1.0 of the paper, considering all other comments received so far. Any further input is still welcome and will be considered for an updated version which, if needed, may be expected for autumn this year. Kind regards CP --- ---------------------------------------------------------------------- --- --- Christian Panigl : Vienna University Computer Center - ACOnet --- --- VUCC - ACOnet - VIX : -------------------------------------------- --- --- Universitaetsstrasse 7 : Mail: Panigl(a)CC.UniVie.ac.at (CP8-RIPE) --- --- A-1010 Vienna / Austria : Tel: +43 1 4277-14032 (Fax: -9140) --- --- ---------------------------------------------------------------------- ---

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unsubscribe
by Cao Pierre 03 Feb '98

03 Feb '98

unsubscribe

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Re: The Cidr Report
by Vince Fuller 02 Feb '98

02 Feb '98

> As you can see things are startng to move up recently. I'd suggest > folks take a look at the "Interesting Aggregates" section on the web > page as it appears there's been a large influx of routes > here. Particularly AS719 who look like they may have a config error > with many many /28s showing up. They aren't the only ones as there > seems to be a lot of potential savings to be made here just by > eye-balling the aggregates. It looks like AS 719 may have cleaned-up their act, but there is still a lot of garbage in that section of the report. Most of them seem to be subnets of /16's that all have the same AS path and therefore have no reason to not be aggregated. 168.108.x.y, 166.102.x.y, 152.166.x.y-152.172.x.y, 129.81.x.y, and 139.175.x.y are the most obvious offenders - all of the components of each are singly-homed to a single AS path (yes, AS 1 has a couple of small ones not listed above - I'll see about chasing those down). Others, like 161.11.x.y, 138.87.x.y, 137.15.x.y, 137.98.x.y, and 143.233.x.y appear to be multi-homed but still shouldn't need to be propagated to the global Internet. If you're going to accept CIDR block subcomponents from your customers for load-balancing or other purposes, please set community "no-advertise" or otherwise prevent them from leaking out to the rest of the net - everyone else doesn't need to see your trash... --Vince (note: from address modified to discourage spam)

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