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The Cidr Report

  • From: Tony Bates
  • Date: Fri Oct 24 15:23:28 1997

This is an auto-generated mail on Fri Oct 24 12:00:00 PDT 1997
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      A summary of the last weeks changes in terms of withdrawn and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 24Oct97


0) General Status

Table History
-------------

Date	Prefixes
171097	46329
181097	46308
191097	46343
201097	46215
211097	46566
221097	46192
231097	46291
241097	46322

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:                 2794

Number of ASes announcing only one prefix:        1261 (669 cidr, 592 classful)

Largest number of  cidr routes:                    453 announced by AS3561
Largest number of classful routes:                 946 announced by AS3561



1) Gains by aggregating at the origin AS level

 --- 24Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       816      466      350   42.9%   iSTAR Internet, Inc.
AS3602       529      307      222   42.0%   Sprint Canada Inc.
AS174        853      660      193   22.6%   Performance Systems International
AS4293       367      175      192   52.3%   IMCI
AS816        506      352      154   30.4%   UUNET Canada (ASN-UUNETCA-AS4)
AS719        687      559      128   18.6%   LANLINK autonomous system
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       169       75       94   55.6%   Videotron Telecom Ltee
AS701        931      854       77    8.3%   Alternet
AS2704       257      180       77   30.0%   HOOKUP-NET-A
AS1967       137       65       72   52.6%   Middle East Technical University 
AS2048       158       90       68   43.0%   LaNet
AS3804       201      137       64   31.8%   Bell Solutions
AS4648       207      147       60   29.0%   NZIX 2
AS1239       619      560       59    9.5%   SprintLink Backbone
AS5668        92       34       58   63.0%   Century Telephone Inc.
AS1221       388      332       56   14.4%   AARNET-AS
AS72          84       30       54   64.3%   Schlumberger Information Network
AS3464       117       63       54   46.2%   ASC-NET
AS1          893      840       53    5.9%   BBNPLANET
AS549        215      165       50   23.3%   ONet Backbone
AS4747       123       75       48   39.0%   Taiwan Telecommunication Network 
AS4763       112       65       47   42.0%   Telstra New Zealand
AS271        107       60       47   43.9%   BCnet Backbone
AS3561       946      900       46    4.9%   MCI
AS7545       119       76       43   36.1%   TPG Internet Pty Ltd
AS2711        96       57       39   40.6%   SUNBELT-AS
AS6412        48       12       36   75.0%   Gulfnet International
AS4755        63       27       36   57.1%   Videsh Sanchar Nigam Ltd. India
AS1691       158      122       36   22.8%   BCTEL

 --- 23Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       842      481      361   42.9%   UNKNOWN
AS174        938      716      222   23.7%   UNKNOWN
AS3602       523      308      215   41.1%   UNKNOWN
AS4293       363      176      187   51.5%   UNKNOWN
AS816        500      350      150   30.0%   UNKNOWN
AS719        688      560      128   18.6%   UNKNOWN
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       168       74       94   56.0%   UNKNOWN
AS701        934      855       79    8.5%   UNKNOWN
AS2704       255      180       75   29.4%   UNKNOWN
AS1967       135       64       71   52.6%   Middle East Technical University 
AS2048       158       92       66   41.8%   UNKNOWN
AS5668        92       31       61   66.3%   Century Telephone Inc.
AS4648       208      148       60   28.8%   UNKNOWN
AS1239       614      555       59    9.6%   UNKNOWN
AS1221       387      331       56   14.5%   UNKNOWN
AS72          83       29       54   65.1%   Schlumberger Information Network
AS3464       117       63       54   46.2%   ASC-NET
AS1          894      841       53    5.9%   UNKNOWN
AS549        221      170       51   23.1%   UNKNOWN
AS4747       122       74       48   39.3%   Taiwan Telecommunication Network 
AS3561       953      905       48    5.0%   UNKNOWN
AS4763       112       65       47   42.0%   Telstra New Zealand
AS271        107       60       47   43.9%   BCnet Backbone
AS721        355      311       44   12.4%   UNKNOWN
AS7545       120       78       42   35.0%   TPG Internet Pty Ltd
AS2711        96       57       39   40.6%   SUNBELT-AS
AS6412        48       12       36   75.0%   Gulfnet International
AS4755        62       26       36   58.1%   Videsh Sanchar Nigam Ltd. India
AS1691       158      122       36   22.8%   BCTEL

 --- 22Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS174        936      713      223   23.8%   Performance Systems International
AS2493       477      335      142   29.8%   iSTAR Internet, Inc.
AS3602       368      242      126   34.2%   Sprint Canada Inc.
AS816        438      315      123   28.1%   UUNET Canada (ASN-UUNETCA-AS4)
AS4293       227      128       99   43.6%   IMCI
AS839        123       31       92   74.8%   CANET-ASN
AS2704       247      175       72   29.1%   HOOKUP-NET-A
AS2048       160       91       69   43.1%   LaNet
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS701        856      803       53    6.2%   Alternet
AS1          895      842       53    5.9%   BBNPLANET
AS3464       117       66       51   43.6%   ASC-NET
AS4763       104       60       44   42.3%   Telstra New Zealand
AS4747       100       56       44   44.0%   Taiwan Telecommunication Network 
AS719        499      459       40    8.0%   LANLINK autonomous system
AS271         88       54       34   38.6%   BCNET-AS
AS4200       103       76       27   26.2%   AGIS (Apex Global Information Ser
AS278         78       52       26   33.3%   Academic Network of Mexico, UNAM.
AS3404        79       54       25   31.6%   COLORADOCOOP
AS1761        48       23       25   52.1%   Texas Dept. of Information Resour
AS1239       511      486       25    4.9%   SprintLink Backbone
AS3566        42       19       23   54.8%   JRIVER-LINK
AS2764       366      343       23    6.3%   connect.com.au pty ltd
AS7051        31        9       22   71.0%   Secure Network Systems
AS5381        58       36       22   37.9%   PowerTech Information Systems AS
AS6392        42       21       21   50.0%   MidWest Communications, Inc.
AS5589        58       37       21   36.2%   Telecom Finland iNET, Belgium
AS2907       176      155       21   11.9%   SINET
AS4057        40       20       20   50.0%   I2020

 --- 21Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       837      483      354   42.3%   iSTAR Internet, Inc.
AS174        931      710      221   23.7%   Performance Systems International
AS3602       524      310      214   40.8%   Sprint Canada Inc.
AS4293       363      176      187   51.5%   IMCI
AS816        498      347      151   30.3%   UUNET Canada (ASN-UUNETCA-AS4)
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       166       77       89   53.6%   Videotron Telecom Ltee
AS701        988      901       87    8.8%   Alternet
AS2704       255      180       75   29.4%   HOOKUP-NET-A
AS1967       135       64       71   52.6%   Middle East Technical University 
AS2048       160       91       69   43.1%   LaNet
AS4648       206      146       60   29.1%   NZIX 2
AS1239       617      558       59    9.6%   SprintLink Backbone
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS3464       117       63       54   46.2%   ASC-NET
AS1          895      842       53    5.9%   BBNPLANET
AS4747       122       74       48   39.3%   Taiwan Telecommunication Network 
AS4763       112       65       47   42.0%   Telstra New Zealand
AS3561       946      899       47    5.0%   MCI
AS271        100       55       45   45.0%   BCnet Backbone
AS721        352      309       43   12.2%   DLA-ASNBLOCK-AS
AS719        533      490       43    8.1%   LANLINK autonomous system
AS2711        96       57       39   40.6%   SUNBELT-AS
AS7545       116       78       38   32.8%   TPG Internet Pty Ltd
AS6412        48       12       36   75.0%   Gulfnet International
AS1691       158      122       36   22.8%   BCTEL
AS4200       124       90       34   27.4%   AGIS (Apex Global Information Ser
AS376         98       64       34   34.7%   RISQ
AS3564        61       27       34   55.7%   Microserve Infromation Systems In

 --- 20Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       833      481      352   42.3%   iSTAR Internet, Inc.
AS3602       530      314      216   40.8%   Sprint Canada Inc.
AS174        918      703      215   23.4%   Performance Systems International
AS816        500      347      153   30.6%   UUNET Canada (ASN-UUNETCA-AS4)
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       166       77       89   53.6%   Videotron Telecom Ltee
AS701        992      905       87    8.8%   Alternet
AS4293       161       78       83   51.6%   IMCI
AS2704       255      180       75   29.4%   HOOKUP-NET-A
AS2048       160       89       71   44.4%   LaNet
AS1967       135       64       71   52.6%   Middle East Technical University 
AS3804       201      137       64   31.8%   Bell Solutions
AS5668        87       27       60   69.0%   Century Telephone Inc.
AS4648       207      147       60   29.0%   NZIX 2
AS1239       613      554       59    9.6%   SprintLink Backbone
AS719        584      526       58    9.9%   LANLINK autonomous system
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS3464       117       63       54   46.2%   ASC-NET
AS1          891      838       53    5.9%   BBNPLANET
AS549        222      174       48   21.6%   ONet Backbone
AS4747       122       74       48   39.3%   Taiwan Telecommunication Network 
AS4763       112       65       47   42.0%   Telstra New Zealand
AS3561       918      871       47    5.1%   MCI
AS271        101       56       45   44.6%   BCnet Backbone
AS721        346      303       43   12.4%   DLA-ASNBLOCK-AS
AS2711        96       57       39   40.6%   SUNBELT-AS
AS7545       115       77       38   33.0%   TPG Internet Pty Ltd
AS6412        48       12       36   75.0%   Gulfnet International
AS1691       158      122       36   22.8%   BCTEL

 --- 19Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       830      479      351   42.3%   iSTAR Internet, Inc.
AS174        925      704      221   23.9%   Performance Systems International
AS3602       530      314      216   40.8%   Sprint Canada Inc.
AS4293       361      174      187   51.8%   IMCI
AS816        496      345      151   30.4%   UUNET Canada (ASN-UUNETCA-AS4)
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       166       77       89   53.6%   Videotron Telecom Ltee
AS701        994      907       87    8.8%   Alternet
AS2704       255      180       75   29.4%   HOOKUP-NET-A
AS1967       135       64       71   52.6%   Middle East Technical University 
AS2048       159       90       69   43.4%   LaNet
AS3804       201      137       64   31.8%   Bell Solutions
AS5668        87       27       60   69.0%   Century Telephone Inc.
AS4648       205      146       59   28.8%   NZIX 2
AS1239       609      550       59    9.7%   SprintLink Backbone
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS719        573      519       54    9.4%   LANLINK autonomous system
AS3464       117       63       54   46.2%   ASC-NET
AS1          894      841       53    5.9%   BBNPLANET
AS549        222      174       48   21.6%   ONet Backbone
AS4747       121       73       48   39.7%   Taiwan Telecommunication Network 
AS3561       944      896       48    5.1%   MCI
AS4763       112       65       47   42.0%   Telstra New Zealand
AS271        100       55       45   45.0%   BCnet Backbone
AS721        344      301       43   12.5%   DLA-ASNBLOCK-AS
AS2711        96       57       39   40.6%   SUNBELT-AS
AS7545       114       76       38   33.3%   TPG Internet Pty Ltd
AS852        151      115       36   23.8%   AGT Advance Communication
AS6412        48       12       36   75.0%   Gulfnet International

 --- 18Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       831      480      351   42.2%   iSTAR Internet, Inc.
AS174        929      705      224   24.1%   Performance Systems International
AS3602       530      314      216   40.8%   Sprint Canada Inc.
AS4293       359      176      183   51.0%   IMCI
AS816        501      347      154   30.7%   UUNET Canada (ASN-UUNETCA-AS4)
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       166       77       89   53.6%   Le Groupe Videotron Ltee
AS701        993      906       87    8.8%   Alternet
AS2704       257      181       76   29.6%   HOOKUP-NET-A
AS1967       135       64       71   52.6%   Middle East Technical University 
AS2048       159       90       69   43.4%   LaNet
AS3804       201      137       64   31.8%   Bell Solutions
AS5668        87       27       60   69.0%   Century Telephone Inc.
AS4648       206      146       60   29.1%   NZIX 2
AS1239       603      545       58    9.6%   SprintLink Backbone
AS719        583      526       57    9.8%   LANLINK autonomous system
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS3464       117       63       54   46.2%   ASC-NET
AS1          890      838       52    5.8%   BBNPLANET
AS3561       945      897       48    5.1%   MCI
AS4763       112       65       47   42.0%   Telstra New Zealand
AS549        218      172       46   21.1%   ONet Backbone
AS4747       117       71       46   39.3%   Taiwan Telecommunication Network 
AS271        100       55       45   45.0%   BCnet Backbone
AS721        344      301       43   12.5%   DLA-ASNBLOCK-AS
AS2711        96       57       39   40.6%   SUNBELT-AS
AS7545       114       76       38   33.3%   TPG Internet Pty Ltd
AS852        151      115       36   23.8%   AGT Advance Communication
AS6412        48       12       36   75.0%   Gulfnet International

 --- 17Oct97 ---
ASnum    NetsNow NetsCIDR  NetGain  % Gain   Description

AS2493       830      479      351   42.3%   iSTAR Internet, Inc.
AS174        934      711      223   23.9%   Performance Systems International
AS3602       529      315      214   40.5%   Sprint Canada Inc.
AS4293       362      175      187   51.7%   IMCI
AS816        496      347      149   30.0%   UUNET Canada (ASN-UUNETCA-AS4)
AS839        124       27       97   78.2%   North West Territories Regional N
AS5769       165       76       89   53.9%   Le Groupe Videotron Ltee
AS701        978      893       85    8.7%   Alternet
AS2704       245      173       72   29.4%   HOOKUP-NET-A
AS1967       135       64       71   52.6%   Middle East Technical University 
AS2048       159       90       69   43.4%   LaNet
AS5668        88       23       65   73.9%   Century Telephone Inc.
AS3804       201      137       64   31.8%   Bell Solutions
AS4648       207      147       60   29.0%   NZIX 2
AS1239       613      554       59    9.6%   SprintLink Backbone
AS719        583      526       57    9.8%   LANLINK autonomous system
AS1221       387      331       56   14.5%   AARNET-AS
AS72          83       29       54   65.1%   Schlumberger Information Network
AS3464       116       64       52   44.8%   ASC-NET
AS1          890      838       52    5.8%   BBNPLANET
AS549        222      172       50   22.5%   ONet Backbone
AS4763       112       65       47   42.0%   Telstra New Zealand
AS3561       938      891       47    5.0%   MCI
AS4747       118       72       46   39.0%   Taiwan Telecommunication Network 
AS271        101       56       45   44.6%   BCnet Backbone
AS721        344      301       43   12.5%   DLA-ASNBLOCK-AS
AS2711        96       57       39   40.6%   SUNBELT-AS
AS7545       114       76       38   33.3%   TPG Internet Pty Ltd
AS1691       159      122       37   23.3%   BCTEL
AS852        151      115       36   23.8%   AGT Advance Communication




2) Weekly Delta

This a daily snapshot of changes in classful routes being withdrawn and added.
the deltas are calculated over a rolling 7 day period. Please bear in mind this
is purely a "snapshot" and a large flucuation could be caused by a connectivity
problem for example. However, this does give some indication of service
providers that are moving to classless routing.


Top 20 Withdrawn Classful Routes from 17Oct97 to 24Oct97
	-132  AS721 DLA-ASNBLOCK-AS
	 -81  AS174 Performance Systems International
	 -48  AS724 DLA-ASNBLOCK-AS
	 -47  AS701 Alternet
	 -42  AS400 AFCONC-BLOCK1-AS
	 -31 AS7051 Secure Network Systems
	 -23 AS1461 UNKNOWN
	 -22 AS6401 eConnect
	 -21 AS6595 DODDSEUR
	 -15 AS4200 AGIS (Apex Global Information Ser
	 -14 AS2493 iSTAR Internet, Inc.
	 -13  AS568 JIS (Joint Interconnection Servic
	 -12 AS2548 DIGEX-AS
	 -10 AS3563 Pilot Network Services, Inc.
	  -9  AS450 AFCONC-BLOCK1-AS
	  -8 AS6357 DBTECH
	  -7  AS549 ONet Backbone
	  -6 AS1564 UNKNOWN
	  -5 AS3527 NIH-NET
	  -4 AS2012 ELTENET

Top 20 Added Classful Routes from 17Oct97 to 24Oct97
	 106 AS2764 connect.com.au pty ltd
	 104  AS719 LANLINK autonomous system
	  63 AS4778 AUNET Corp.
	  44 AS4786 Ballarat NetConnect Pty Ltd
	  12 AS2704 HOOKUP-NET-A
	  11 AS2592 E.U. BAUM, Izmir, TURKIYE
	  10  AS802 York University
	   9 AS1251 ANBR-AS
	   8 AS3561 MCI
	   6  AS271 BCnet Backbone
	   5 AS4747 Taiwan Telecommunication Network 
	   4 AS5668 Century Telephone Inc.
	   3 AS6140 ImpSat Corp
	   2 AS3354 THENET-AS-1
	   1 AS4805 Global IP

This a daily snapshot of changes in classles routes being withdrawn and added.


Top 20 Withdrawn Classles Routes from 17Oct97 to 24Oct97
	 -39 AS3336 Internet Services, Kolumbus proje
	 -16  AS568 JIS (Joint Interconnection Servic
	 -11 AS5074 ATT-WN-DP
	  -8  AS701 Alternet
	  -6 AS4780 INSTITUTE FOR INFORMATION INDUSTR
	  -5 AS4694 International Digital Communicati
	  -4 AS4433 Access One Pty Ltd (ASN-ACCESS-ON
	  -3 AS3763 Aimnet Corporation
	  -2 AS2563 KoRea Education Network
	  -1 AS2707 WEC

Top 20 Added Classles Routes from 17Oct97 to 24Oct97
	  54 AS7777 VIX2
	  27  AS174 Performance Systems International
	  19 AS2764 connect.com.au pty ltd
	  16 AS4778 AUNET Corp.
	   9 AS5006 Minnesota Internet eXchange
	   8 AS1333 ANS Atlanta - DNSS 107
	   7 AS3561 MCI
	   6 AS3758 SINGNET
	   5 AS2493 iSTAR Internet, Inc.
	   4 AS2871 Internet Services GmbH & Co
	   3 AS5408 Greek Research and Technology Net
	   2 AS6772 SUPERNOVA AS
	   1 AS3393 Computing Engineers



3) Interesting aggregates



            List of possibly interesting aggregates
            ---------------------------------------

         Aggregate | Origin | AS Description          | Netname                
-------------------------------------------------------------------------------




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