- routing-wg - mailman.ripe.net

Re: FW: Reachability 170.9.192.0/18
by Geoff Huston 29 Nov '00

29 Nov '00

I see some 1,927 /18 prefixes from my remote corner of the BGP world (AS 1221) and the number has been steadily growing. (http://www.telstra.net/ops/bgp/bgp-prefix-18.html) 151 of these /18 prefixes come from the old B range, and the transits carrying these prefixes include AS 1, 701, 5727 & 3561 to name but a few of the 133 AS's whose AS number appears in the paths of this set of /18 prefixes. So is /18 filtering on the old B space ubiquitous? No - it appears not. Is it common practice to filter such routes? Again the evidence appears to say no, although its hard to tell from one view of the route table how many other /18 advertisements have been filtered out. That is NOT the same as saying "Will my /18 get advertised ubiquitously?", as I suspect the answer to this latter question is "no, there are a number of transits who are applying prefix filters such that these announcements will not be carried across their networks." regards, Geoff Huston At 11/29/00 09:44 AM +0100, Guillaume, Frederic wrote: >All, > >We have a couple of customers with /18 networks. Apparently, these networks >are not routed over some part of the Internet because they belong to a class >B range (c.f. 170.9.192.0/18) and we only route part of it (c.f. /18 instead >of /16). > >Is it a common routing policy to filter such routes (see Verio routing >policy http://info.us.bb.verio.net/routing.html#PeerFilter ><http://info.us.bb.verio.net/routing.html#PeerFilter> ) ? > > >Thanks for your input, > >TELFORT >Frï¿½dï¿½ric Guillaume Tel: (+31) 20 200 70 80 >Design & Planning Data Fax: (+31) 20 200 66 14 >Networks & Systems Mob: (+31) 6 26 69 80 27

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FW: Reachability 170.9.192.0/18
by Guillaume, Frederic 29 Nov '00

29 Nov '00

All, We have a couple of customers with /18 networks. Apparently, these networks are not routed over some part of the Internet because they belong to a class B range (c.f. 170.9.192.0/18) and we only route part of it (c.f. /18 instead of /16). Is it a common routing policy to filter such routes (see Verio routing policy http://info.us.bb.verio.net/routing.html#PeerFilter <http://info.us.bb.verio.net/routing.html#PeerFilter> ) ? Thanks for your input, TELFORT Frï¿½dï¿½ric Guillaume Tel: (+31) 20 200 70 80 Design & Planning Data Fax: (+31) 20 200 66 14 Networks & Systems Mob: (+31) 6 26 69 80 27

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The Cidr Report
by Tony Bates 24 Nov '00

24 Nov '00

This is an auto-generated mail on Fri Nov 24 12:00:00 PST 2000 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 24Nov00 0) General Status Table History ------------- Date Prefixes 051100 90552 061100 90504 071100 90705 081100 91061 091100 91153 221100 92414 231100 92419 241100 92527 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 91.16.23.0/24 from AS11770 *** Bogus 219.219.219.0 from AS2563 AS Summary ---------- Number of ASes in routing system: 9183 Number of ASes announcing only one prefix: 5305 (2973 cidr, 2332 classful) Largest number of cidr routes: 953 announced by AS701 Largest number of classful routes: 1360 announced by AS701 1) Gains by aggregating at the origin AS level --- 24Nov00 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS2563 430 135 295 68.6% KoRean Education Network AS1221 624 455 169 27.1% TELSTRA-AS AS9269 163 51 112 68.7% Hong Kong CTI AS701 1360 1248 112 8.2% Alternet AS2609 126 17 109 86.5% EUnet-TN AS7545 162 54 108 66.7% TPG Internet Pty Ltd AS8013 459 355 104 22.7% PSINET-CA AS271 209 112 97 46.4% BCnet Backbone AS6595 156 62 94 60.3% DODDSEUR AS4755 206 112 94 45.6% Videsh Sanchar Nigam Ltd. India AS13999 94 6 88 93.6% UNKNOWN AS7657 277 193 84 30.3% The Internet Group Limited AS705 334 253 81 24.3% ALTERNET-AS AS4293 343 262 81 23.6% Internal ASN for C&W AS174 527 446 81 15.4% Performance Systems International AS7496 102 25 77 75.5% Power Up AS4151 286 209 77 26.9% USDA Internet Access Network AS7046 323 248 75 23.2% UUNET-CUSTOMER AS724 238 165 73 30.7% DLA-ASNBLOCK-AS AS577 243 173 70 28.8% Bell Backbone AS3908 239 169 70 29.3% Supernet, Inc. AS7018 589 524 65 11.0% AT&T WorldNet Service Backbone AS5106 101 37 64 63.4% AADS-COLUMBUS AS3749 121 59 62 51.2% TECNET AS226 168 106 62 36.9% USC/Information Sciences Institut AS816 382 322 60 15.7% UUNET Canada (ASN-UUNETCA-AS4) AS376 141 81 60 42.6% RISQ AS3602 307 249 58 18.9% Sprint Canada Inc. AS16758 63 6 57 90.5% UNKNOWN AS11252 90 37 53 58.9% Idaho State University 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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RIPE NCC Region Weekly Routing Report
by Routing Analysis 23 Nov '00

23 Nov '00

This is an automated weekly mailing sent to the RIPE Routing WG e-mail list describing the state of the Internet Routing Table in Europe, Middle East and North Africa. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Europe, Middle East, North Africa Report 24 Nov, 2000 Analysis Summary ---------------- BGP routing table entries examined: 94963 Origin ASes present in the Internet Routing Table: 9195 Origin ASes announcing only one prefix: 3207 Transit ASes present in the Internet Routing Table: 1236 Average AS path length visible in the Internet Routing Table: 5.3 Max AS path length visible: 18 Illegal AS announcements present in the Routing Table: 23 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 2 Number of addresses announced to Internet: 1228704450 Equivalent to 73 /8s, 60 /16s and 138 /24s Percentage of available address space announced: 33.1 Percentage of allocated address space announced: 65.0 Percentage of available address space allocated: 51.0 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 15029 Prefixes being announced from the RIPE address blocks: 11866 RIPE Region origin ASes present in the Internet Routing Table: 2505 RIPE Region origin ASes announcing only one prefix: 1236 RIPE Region transit ASes present in the Internet Routing Table: 461 Average RIPE Region AS path length visible: 6.0 Max RIPE Region AS path length visible: 18 Number of RIPE addresses announced to Internet: 101915151 Equivalent to 6 /8s, 19 /16s and 26 /24s Percentage of available RIPE address space announced: 86.8 RIPE AS Blocks 1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 RIPE Address Blocks 62/8, 193/8, 194/7, 212/7 and 217/8 RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /19 equiv Description 1309 492 133 INRIA 3301 396 307 TeliaNet Sweden 1257 340 266 Swipnet AB 702 295 435 UUNET Technologies, Inc. 1270 267 417 UUNET Germany 1849 199 309 PIPEX 719 191 154 LANLINK 5515 187 342 Sonera Finland 786 180 959 JANET IP Service 3215 172 171 RAIN 3320 152 434 Deutsche Telekom AG 517 144 171 Xlink 2609 128 5 EUnet-TN 2856 128 376 BTnet UK Regional network 3303 125 277 Swisscom 1275 121 551 DFN IP Service 680 117 588 Deutschef Forschurgsnetz 1901 103 77 EUnet Austria 1267 93 955 IUnet S.p.A Global Per AS prefix count summary ---------------------------------- ASN No of nets /19 equiv Description 701 2321 3438 UUNET Technologies, Inc. 1 1000 4553 BBN Planet 1221 926 984 Telstra 705 911 47 UUNET Technologies, Inc. 7018 881 3038 AT&T 1239 720 1645 Sprint ICM-Inria 7046 684 526 UUNET Technologies, Inc. 2914 671 1291 Verio, Inc. 174 595 2733 PSINet Inc. 2563 588 82 Seoul National University 209 550 563 Qwest 3561 547 1342 Cable & Wireless USA 6082 532 66 Management Analysis, Incorpor 1309 492 133 INRIA 3549 487 413 Frontier GlobalCenter 2764 446 128 connect.com.au pty ltd 816 443 141 UUNET Canada4 2548 442 546 Digital Express Group, Inc. 4293 437 55 Cable & Wireless USA List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 65318 PRIVATE 62.179.0.0/19 6830 chello broadband 2027 UNALLOCATED 150.185.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.185.128.0/18 8143 Publicom Corp. 2027 UNALLOCATED 150.186.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.187.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.188.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.189.0.0/16 10530 Interpacket Group, I 64621 PRIVATE 152.121.2.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.3.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.4.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.33.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.49.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.100.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.200.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.255.0/24 701 UUNET Technologies, 1877 UNALLOCATED 192.108.196.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.209.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.210.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.214.0/24 1880 Stupi, house man's 5757 UNALLOCATED 192.239.13.0/24 701 UUNET Technologies, 65534 PRIVATE 203.177.23.0/24 4775 G-Net 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, 57158 RESERVED 210.56.192.0/20 4628 Pacific Internet Pte Advertised IANA Reserved Addresses ---------------------------------- Network Origin AS Description 91.16.23.0/24 11770 Net56 219.219.219.0/24 2563 Seoul National University Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:24 /9:4 /10:5 /11:9 /12:32 /13:56 /14:181 /15:289 /16:6727 /17:982 /18:1937 /19:6091 /20:4109 /21:4026 /22:6177 /23:8162 /24:55056 /25:229 /26:428 /27:95 /28:80 /29:84 /30:90 /31:0 /32:90 End of report

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RIPE NCC Region Weekly Routing Report
by Routing Analysis 16 Nov '00

16 Nov '00

This is an automated weekly mailing sent to the RIPE Routing WG e-mail list describing the state of the Internet Routing Table in Europe, Middle East and North Africa. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Europe, Middle East, North Africa Report 17 Nov, 2000 Analysis Summary ---------------- BGP routing table entries examined: 95742 Origin ASes present in the Internet Routing Table: 9122 Origin ASes announcing only one prefix: 3174 Transit ASes present in the Internet Routing Table: 1231 Average AS path length visible in the Internet Routing Table: 5.3 Max AS path length visible: 18 Illegal AS announcements present in the Routing Table: 29 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 4 Number of addresses announced to Internet: 1228235646 Equivalent to 73 /8s, 53 /16s and 99 /24s Percentage of available address space announced: 33.1 Percentage of allocated address space announced: 65.0 Percentage of available address space allocated: 51.0 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 14423 Prefixes being announced from the RIPE address blocks: 11299 RIPE Region origin ASes present in the Internet Routing Table: 2481 RIPE Region origin ASes announcing only one prefix: 1217 RIPE Region transit ASes present in the Internet Routing Table: 453 Average RIPE Region AS path length visible: 6.0 Max RIPE Region AS path length visible: 18 Number of RIPE addresses announced to Internet: 84312250 Equivalent to 5 /8s, 6 /16s and 128 /24s Percentage of available RIPE address space announced: 71.8 RIPE AS Blocks 1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 RIPE Address Blocks 62/8, 193/8, 194/7, 212/7 and 217/8 RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /19 equiv Description 3301 395 307 TeliaNet Sweden 1257 334 266 Swipnet AB 702 291 423 UUNET Technologies, Inc. 1270 264 417 UUNET Germany 1849 208 315 PIPEX 719 190 154 LANLINK 5515 185 342 Sonera Finland 786 180 959 JANET IP Service 3215 162 170 RAIN 3320 150 434 Deutsche Telekom AG 517 145 171 Xlink 1275 133 616 DFN IP Service 2609 128 4 EUnet-TN 2856 126 376 BTnet UK Regional network 3303 124 261 Swisscom 680 105 539 Deutschef Forschurgsnetz 1901 103 77 EUnet Austria 1267 93 955 IUnet S.p.A 2830 89 29 UUNET UK (formerly PIPEX) Global Per AS prefix count summary ---------------------------------- ASN No of nets /19 equiv Description 701 2262 3431 UUNET Technologies, Inc. 4788 1325 46 TMnet, Telekom Malaysia 1 1004 4553 BBN Planet 1221 882 983 Telstra 705 881 46 UUNET Technologies, Inc. 7018 861 3037 AT&T 1239 716 1646 Sprint ICM-Inria 7046 702 526 UUNET Technologies, Inc. 2914 677 1323 Verio, Inc. 174 606 2963 PSINet Inc. 3561 549 1365 Cable & Wireless USA 209 543 563 Qwest 6082 530 66 Management Analysis, Incorpor 8013 510 64 PSINet Ltd. Canada 3549 489 421 Frontier GlobalCenter 816 473 135 UUNET Canada4 271 459 300 BCnet Backbone 2764 457 129 connect.com.au pty ltd 3602 437 80 Sprint Canada List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 64750 PRIVATE 63.67.32.0/24 15218 Communications 64610 PRIVATE 63.150.35.0/24 209 Qwest 64602 PRIVATE 63.236.57.0/24 209 Qwest 65102 PRIVATE 63.239.14.0/24 209 Qwest 65102 PRIVATE 128.64.17.0/24 209 Qwest 2027 UNALLOCATED 150.185.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.185.128.0/18 8143 Publicom Corp. 2027 UNALLOCATED 150.186.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.187.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.188.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.189.0.0/16 10530 Interpacket Group, I 64621 PRIVATE 152.121.2.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.3.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.4.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.33.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.49.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.100.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.200.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.255.0/24 701 UUNET Technologies, 1877 UNALLOCATED 192.108.196.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.209.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.210.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.214.0/24 1880 Stupi, house man's 5757 UNALLOCATED 192.239.13.0/24 701 UUNET Technologies, 65003 PRIVATE 203.126.185.0/24 3758 SingNet 65003 PRIVATE 203.127.232.0/24 3758 SingNet 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, 64605 PRIVATE 208.47.206.0/24 209 Qwest 57158 RESERVED 210.56.192.0/20 4628 Pacific Internet Pte Advertised IANA Reserved Addresses ---------------------------------- Network Origin AS Description 68.189.125.0/24 702 UUNET Technologies, Inc. 91.16.23.0/24 11770 Net56 100.0.0.0/8 4702 KDD Communications 201.97.98.0/24 18941 Mercurio SAP Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:24 /9:4 /10:5 /11:9 /12:32 /13:58 /14:179 /15:289 /16:6730 /17:973 /18:1930 /19:6061 /20:4043 /21:3956 /22:6058 /23:8038 /24:55204 /25:319 /26:541 /27:245 /28:135 /29:106 /30:617 /31:0 /32:186 End of report

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RIPE NCC Region Weekly Routing Report
by Routing Analysis 09 Nov '00

09 Nov '00

This is an automated weekly mailing sent to the RIPE Routing WG e-mail list describing the state of the Internet Routing Table in Europe, Middle East and North Africa. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Europe, Middle East, North Africa Report 10 Nov, 2000 Analysis Summary ---------------- BGP routing table entries examined: 91017 Origin ASes present in the Internet Routing Table: 9009 Origin ASes announcing only one prefix: 3116 Transit ASes present in the Internet Routing Table: 1242 Average AS path length visible in the Internet Routing Table: 5.5 Max AS path length visible: 18 Illegal AS announcements present in the Routing Table: 25 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 3 Number of addresses announced to Internet: 1191386328 Equivalent to 71 /8s, 3 /16s and 28 /24s Percentage of available address space announced: 32.1 Percentage of allocated address space announced: 63.0 Percentage of available address space allocated: 51.0 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 14532 Prefixes being announced from the RIPE address blocks: 11436 RIPE Region origin ASes present in the Internet Routing Table: 2443 RIPE Region origin ASes announcing only one prefix: 1191 RIPE Region transit ASes present in the Internet Routing Table: 459 Average RIPE Region AS path length visible: 6.4 Max RIPE Region AS path length visible: 18 Number of RIPE addresses announced to Internet: 83494032 Equivalent to 4 /8s, 250 /16s and 4 /24s Percentage of available RIPE address space announced: 71.1 RIPE AS Blocks 1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 RIPE Address Blocks 62/8, 193/8, 194/7, 212/7 and 217/8 RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /19 equiv Description 3301 395 307 TeliaNet Sweden 3352 378 198 Ibernet, Internet A 1257 334 264 Swipnet AB 702 281 413 UUNET Technologies, Inc. 1270 258 415 UUNET Germany 1849 207 317 PIPEX 719 190 154 LANLINK 5515 183 358 Sonera Finland 786 180 959 JANET IP Service 3215 160 170 RAIN 3320 149 434 Deutsche Telekom AG 517 144 171 Xlink 1275 139 665 DFN IP Service 2609 128 4 EUnet-TN 2856 127 376 BTnet UK Regional network 3303 122 261 Swisscom 1901 100 76 EUnet Austria 5583 98 6 Global One NL 680 97 491 Deutschef Forschurgsnetz Global Per AS prefix count summary ---------------------------------- ASN No of nets /19 equiv Description 701 2148 3428 UUNET Technologies, Inc. 7018 897 3034 AT&T 1 884 4531 BBN Planet 1221 754 958 Telstra 705 719 41 UUNET Technologies, Inc. 7046 712 516 UUNET Technologies, Inc. 1239 704 1621 Sprint ICM-Inria 2914 676 1318 Verio, Inc. 174 607 2939 PSINet Inc. 816 569 157 UUNET Canada4 3561 560 1382 Cable & Wireless USA 209 537 563 Qwest 8013 515 64 PSINet Ltd. Canada 3549 483 428 Frontier GlobalCenter 271 459 300 BCnet Backbone 3908 437 289 Supernet, Inc. 4293 436 56 Cable & Wireless USA 2548 431 546 Digital Express Group, Inc. 2764 425 129 connect.com.au pty ltd List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 64750 PRIVATE 63.67.32.0/24 15218 Communications 65519 PRIVATE 64.124.60.0/24 6461 AboveNet Communicati 65519 PRIVATE 64.124.61.0/24 6461 AboveNet Communicati 2027 UNALLOCATED 150.185.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.185.128.0/18 8143 Publicom Corp. 2027 UNALLOCATED 150.186.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.187.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.188.0.0/16 10530 Interpacket Group, I 2027 UNALLOCATED 150.189.0.0/16 10530 Interpacket Group, I 64621 PRIVATE 152.121.2.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.3.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.4.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.33.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.36.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.49.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.100.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.200.0/24 701 UUNET Technologies, 64621 PRIVATE 152.121.255.0/24 701 UUNET Technologies, 1877 UNALLOCATED 192.108.196.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.209.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.210.0/24 1880 Stupi, house man's 1877 UNALLOCATED 192.108.214.0/24 1880 Stupi, house man's 5757 UNALLOCATED 192.239.13.0/24 701 UUNET Technologies, 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, 57158 RESERVED 210.56.192.0/20 4628 Pacific Internet Pte Advertised IANA Reserved Addresses ---------------------------------- Network Origin AS Description 39.144.212.0/24 174 PSINet Inc. 50.50.50.0/30 6713 Itissalat Al-MAGHRIB 60.60.60.0/30 6713 Itissalat Al-MAGHRIB Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:22 /9:4 /10:5 /11:9 /12:32 /13:58 /14:180 /15:288 /16:6709 /17:966 /18:1915 /19:6046 /20:3970 /21:3922 /22:5872 /23:7613 /24:52791 /25:124 /26:178 /27:81 /28:58 /29:95 /30:27 /31:0 /32:52 End of report

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Update to weekly routing analysis summary
by Philip Smith 08 Nov '00

08 Nov '00

Hi, This is to inform you of a small modification to my weekly posting to this list. The "List of Illegal ASes" in the report has been replaced with the "List of Unregistered ASes". Basically this includes the previous private AS and reserved AS announcements, but adds to it the list of ASes announced for which there is no registration information contained in APNIC, ARIN, RIPE NCC, or DDN NIC (US Military) databases. At first run there are three new ASes appearing in this list, in addition to the quantity of private ASes being leaked to the Internet. They are 1877, 2027 and 5757. Any comments or feedback welcome, best wishes! philip --

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Use of advisory attribute
by Shane Kerr 03 Nov '00

03 Nov '00

Routing Folks, I've been looking over the 'advisory' attribute, mostly in preparation for the upcoming RIPE-181 to RPSL conversion (RPSL does not have this attribute). The advisory attribute itself suffers from a severe lack of documentation. In the current database documents, we see the following: RIPE-157: listed as for the route object, with the format <ASnnnn> <as-specific information> RIPE-181: not present RIPE-189: in the route template only As for how the attribute is actually used, I found 2726 route objects with the attribute. Of these, there are only 111 unique origin AS. As for the AS actually listed as the target of the advisory, there are only 13 unique AS! The actual frequencies are: AS517: 8 AS670: 1 AS690: 2703 AS702: 2 AS1275: 13 AS1717: 1 AS1755: 2 AS2917: 5 AS3220: 3 AS3257: 1 AS3328: 1 AS3561: 1 AS6830: 2 AS690, the Merit network, seems to have a specific format for their advisory attribute (which I can guess at, but not really be sure what it means). This is not shared by all of the other AS's who use the advisory attribute. So, some questions are: Is there a BCP for this attribute? And can anyone explain how and why it is used? Can somebody suggest an alternative method to obtain the same results in RPSL? And finally, what should the method be during RIPE-181 to RPSL conversion? -- Shane Kerr <shane(a)ripe.net> Database Software Engineer RIPE NCC +31 20 535 4427

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The Cidr Report
by Tony Bates 03 Nov '00

03 Nov '00

This is an auto-generated mail on Fri Nov 3 12:00:00 PST 2000 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 03Nov00 0) General Status Table History ------------- Date Prefixes 281000 89474 291000 89460 291000 89478 301000 89458 311000 89649 011100 90189 021100 91627 031100 90444 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: 8951 Number of ASes announcing only one prefix: 5138 (2860 cidr, 2278 classful) Largest number of cidr routes: 921 announced by AS701 Largest number of classful routes: 1178 announced by AS701 1) Gains by aggregating at the origin AS level --- 03Nov00 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS271 431 150 281 65.2% BCnet Backbone AS1221 604 450 154 25.5% TELSTRA-AS AS2609 128 8 120 93.8% EUnet-TN AS4755 201 101 100 49.8% Videsh Sanchar Nigam Ltd. India AS174 538 453 85 15.8% Performance Systems International AS4293 340 258 82 24.1% Internal ASN for C&W AS13999 91 9 82 90.1% UNKNOWN AS3908 252 173 79 31.3% Supernet, Inc. AS577 244 174 70 28.7% Bell Backbone AS5106 101 37 64 63.4% AADS-COLUMBUS AS3749 119 58 61 51.3% TECNET AS226 167 106 61 36.5% USC/Information Sciences Institut AS16758 63 6 57 90.5% UNKNOWN AS376 132 76 56 42.4% RISQ AS1727 135 82 53 39.3% MRMS-WEST AS11252 90 37 53 58.9% Idaho State University AS3602 294 242 52 17.7% Sprint Canada Inc. AS5102 74 24 50 67.6% AADS-CHAMPAIGN AS4740 312 262 50 16.0% Ozemail Pty Ltd (ASN-OZEMAIL) AS6429 149 101 48 32.2% FirstCom Internet AS1 631 583 48 7.6% GTE Internetworking AS209 272 227 45 16.5% Qwest Communications AS549 192 148 44 22.9% ONet Backbone AS1239 483 441 42 8.7% SprintLink Backbone AS6082 145 105 40 27.6% HarvardNet, Inc AS4151 89 50 39 43.8% USDA Internet Access Network AS12235 43 4 39 90.7% Cove Software Systems Inc AS1267 60 23 37 61.7% Infostrada S.p.A. AS14 50 14 36 72.0% Columbia University in the City o AS637 55 20 35 63.6% PENS-NET-AS 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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Re: Use of advisory attribute
by Nigel Titley 03 Nov '00

03 Nov '00

> So, some questions are: Is there a BCP for this attribute? And can > anyone explain how and why it is used? Can somebody suggest an > alternative method to obtain the same results in RPSL? And finally, > what should the method be during RIPE-181 to RPSL conversion? Its a hang-over from the days of NSFnet. Long since dead. Nigel

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