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Re: Multi-homed implementation and BGP convergence time
by Scott Weeks 11 Sep '09

11 Sep '09

--- Andrew.Claybaugh(a)securian.com wrote: From: Andrew.Claybaugh(a)securian.com own AS number, how much downtime will there be? So far the second ISP has only said that it could be hours for BGP to fully converge. We are looking for more detail about how long the outage will be and how widespread. --------------------------------------------------- 1) Hire someone that has done this before. There're many things to be aware of. 2) Get a different provider. Anyone that said it "could be hours for BGP to fully converge" is misleading you. Especially, if you're a new customer to them. That's a bad omen for things to come. This can be done with very minimal impact. scott

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Intelligent network monitoring systems (commercial/open source, what have you)
by Drew Weaver 11 Sep '09

11 Sep '09

Howdy, Can anyone suggest a network monitoring system that knows the difference between a cisco 1701 and a GSR 12810/6500, etc? What I mean is, many times these days there are several different sub systems you have to monitor inside of a router/switch and not just interface utilization, the "CPU", and the "RAM". Statistics such as CEF utilization, fabric utilization, PFC/DFC, various line card statistics, etc? Can anyone recommend anything other than "customize MRTG a lot" that we can use to get a better look into these systems? thanks, -Drew

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Weekly Routing Table Report
by Routing Analysis Role Account 11 Sep '09

11 Sep '09

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For historical data, please see http://thyme.apnic.net. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 04:00 +10GMT Sat 12 Sep, 2009 Report Website: http://thyme.apnic.net Detailed Analysis: http://thyme.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 295211 Prefixes after maximum aggregation: 139476 Deaggregation factor: 2.12 Unique aggregates announced to Internet: 147649 Total ASes present in the Internet Routing Table: 32157 Prefixes per ASN: 9.18 Origin-only ASes present in the Internet Routing Table: 27945 Origin ASes announcing only one prefix: 13653 Transit ASes present in the Internet Routing Table: 4212 Transit-only ASes present in the Internet Routing Table: 101 Average AS path length visible in the Internet Routing Table: 3.6 Max AS path length visible: 24 Max AS path prepend of ASN (12026) 22 Prefixes from unregistered ASNs in the Routing Table: 422 Unregistered ASNs in the Routing Table: 115 Number of 32-bit ASNs allocated by the RIRs: 266 Prefixes from 32-bit ASNs in the Routing Table: 120 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 231 Number of addresses announced to Internet: 2104209216 Equivalent to 125 /8s, 107 /16s and 175 /24s Percentage of available address space announced: 56.8 Percentage of allocated address space announced: 65.0 Percentage of available address space allocated: 87.3 Percentage of address space in use by end-sites: 78.8 Total number of prefixes smaller than registry allocations: 141055 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 70468 Total APNIC prefixes after maximum aggregation: 24950 APNIC Deaggregation factor: 2.82 Prefixes being announced from the APNIC address blocks: 66937 Unique aggregates announced from the APNIC address blocks: 30456 APNIC Region origin ASes present in the Internet Routing Table: 3784 APNIC Prefixes per ASN: 17.69 APNIC Region origin ASes announcing only one prefix: 1037 APNIC Region transit ASes present in the Internet Routing Table: 588 Average APNIC Region AS path length visible: 3.5 Max APNIC Region AS path length visible: 16 Number of APNIC addresses announced to Internet: 458005344 Equivalent to 27 /8s, 76 /16s and 155 /24s Percentage of available APNIC address space announced: 78.0 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079 55296-56319, 131072-132095 APNIC Address Blocks 43/8, 58/8, 59/8, 60/8, 61/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 124876 Total ARIN prefixes after maximum aggregation: 66495 ARIN Deaggregation factor: 1.88 Prefixes being announced from the ARIN address blocks: 99443 Unique aggregates announced from the ARIN address blocks: 38338 ARIN Region origin ASes present in the Internet Routing Table: 13222 ARIN Prefixes per ASN: 7.52 ARIN Region origin ASes announcing only one prefix: 5117 ARIN Region transit ASes present in the Internet Routing Table: 1294 Average ARIN Region AS path length visible: 3.3 Max ARIN Region AS path length visible: 24 Number of ARIN addresses announced to Internet: 707359360 Equivalent to 42 /8s, 41 /16s and 114 /24s Percentage of available ARIN address space announced: 62.0 ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959, 46080-47103 53248-55295, 393216-394239 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 52/8, 54/8, 55/8, 56/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 108/8, 173/8, 174/8, 184/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 68016 Total RIPE prefixes after maximum aggregation: 39994 RIPE Deaggregation factor: 1.70 Prefixes being announced from the RIPE address blocks: 61886 Unique aggregates announced from the RIPE address blocks: 41336 RIPE Region origin ASes present in the Internet Routing Table: 13459 RIPE Prefixes per ASN: 4.60 RIPE Region origin ASes announcing only one prefix: 7025 RIPE Region transit ASes present in the Internet Routing Table: 2027 Average RIPE Region AS path length visible: 4.0 Max RIPE Region AS path length visible: 21 Number of RIPE addresses announced to Internet: 397595456 Equivalent to 23 /8s, 178 /16s and 211 /24s Percentage of available RIPE address space announced: 79.0 RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-45055, 47104-52223, 196608-197631 RIPE Address Blocks 25/8, 51/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 178/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 25363 Total LACNIC prefixes after maximum aggregation: 6220 LACNIC Deaggregation factor: 4.08 Prefixes being announced from the LACNIC address blocks: 23699 Unique aggregates announced from the LACNIC address blocks: 13207 LACNIC Region origin ASes present in the Internet Routing Table: 1177 LACNIC Prefixes per ASN: 20.14 LACNIC Region origin ASes announcing only one prefix: 379 LACNIC Region transit ASes present in the Internet Routing Table: 191 Average LACNIC Region AS path length visible: 4.1 Max LACNIC Region AS path length visible: 21 Number of LACNIC addresses announced to Internet: 66365952 Equivalent to 3 /8s, 244 /16s and 170 /24s Percentage of available LACNIC address space announced: 65.9 LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 262144-263167 plus ERX transfers LACNIC Address Blocks 186/8, 187/8, 189/8, 190/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 6131 Total AfriNIC prefixes after maximum aggregation: 1561 AfriNIC Deaggregation factor: 3.93 Prefixes being announced from the AfriNIC address blocks: 4483 Unique aggregates announced from the AfriNIC address blocks: 1517 AfriNIC Region origin ASes present in the Internet Routing Table: 320 AfriNIC Prefixes per ASN: 14.01 AfriNIC Region origin ASes announcing only one prefix: 95 AfriNIC Region transit ASes present in the Internet Routing Table: 68 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 14 Number of AfriNIC addresses announced to Internet: 12306688 Equivalent to 0 /8s, 187 /16s and 201 /24s Percentage of available AfriNIC address space announced: 36.7 AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers AfriNIC Address Blocks 41/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4766 1729 6982 427 Korea Telecom (KIX) 17488 1542 137 102 Hathway IP Over Cable Interne 4755 1258 292 143 TATA Communications formerly 9583 1097 87 533 Sify Limited 4134 1006 18167 389 CHINANET-BACKBONE 18101 959 201 32 Reliance Infocom Ltd Internet 7545 842 198 99 TPG Internet Pty Ltd 9829 811 625 18 BSNL National Internet Backbo 4808 766 1534 183 CNCGROUP IP network: China169 23577 763 33 648 Korea Telecom (ATM-MPLS) Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 6389 4173 3626 313 bellsouth.net, inc. 4323 1927 1049 389 Time Warner Telecom 1785 1739 714 138 PaeTec Communications, Inc. 7018 1526 5909 1059 AT&T WorldNet Services 20115 1479 1477 674 Charter Communications 6478 1405 282 249 AT&T Worldnet Services 2386 1292 654 939 AT&T Data Communications Serv 3356 1226 10980 439 Level 3 Communications, LLC 11492 1120 208 12 Cable One 22773 1099 2604 66 Cox Communications, Inc. Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 30890 489 92 199 Evolva Telecom 3292 448 1901 395 TDC Tele Danmark 12479 426 578 6 Uni2 Autonomous System 702 425 1821 343 UUNET - Commercial IP service 35805 386 40 5 United Telecom of Georgia 9198 375 138 12 Kazakhtelecom Data Network Ad 8866 358 110 23 Bulgarian Telecommunication C 3320 354 7067 303 Deutsche Telekom AG 3301 350 1412 309 TeliaNet Sweden 3215 347 3121 111 France Telecom Transpac Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 1495 2899 243 UniNet S.A. de C.V. 10620 1013 226 97 TVCABLE BOGOTA 28573 707 620 61 NET Servicos de Comunicao S.A 7303 635 336 93 Telecom Argentina Stet-France 22047 542 302 14 VTR PUNTO NET S.A. 11830 476 310 58 Instituto Costarricense de El 11172 441 99 69 Servicios Alestra S.A de C.V 7738 424 858 29 Telecomunicacoes da Bahia S.A 6471 421 96 31 ENTEL CHILE S.A. 3816 401 191 79 Empresa Nacional de Telecomun Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 8452 992 188 7 TEDATA 24863 947 96 57 LINKdotNET AS number 20858 296 34 6 EgyNet 3741 275 856 236 The Internet Solution 2018 207 180 142 Tertiary Education Network 6713 175 166 16 Itissalat Al-MAGHRIB 29571 139 14 6 Ci Telecom Autonomous system 24835 131 46 9 RAYA Telecom - Egypt 33776 123 7 11 Starcomms Nigeria Limited 5536 122 8 13 Internet Egypt Network Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 6389 4173 3626 313 bellsouth.net, inc. 4323 1927 1049 389 Time Warner Telecom 1785 1739 714 138 PaeTec Communications, Inc. 4766 1729 6982 427 Korea Telecom (KIX) 17488 1542 137 102 Hathway IP Over Cable Interne 7018 1526 5909 1059 AT&T WorldNet Services 8151 1495 2899 243 UniNet S.A. de C.V. 20115 1479 1477 674 Charter Communications 6478 1405 282 249 AT&T Worldnet Services 2386 1292 654 939 AT&T Data Communications Serv Complete listing at http://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 1785 1739 1601 PaeTec Communications, Inc. 4323 1927 1538 Time Warner Telecom 17488 1542 1440 Hathway IP Over Cable Interne 4766 1729 1302 Korea Telecom (KIX) 8151 1495 1252 UniNet S.A. de C.V. 6478 1405 1156 AT&T Worldnet Services 4755 1258 1115 TATA Communications formerly 11492 1120 1108 Cable One 18566 1062 1052 Covad Communications 22773 1099 1033 Cox Communications, Inc. Complete listing at http://thyme.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Network Transit AS Description 16927 UNALLOCATED 12.0.252.0/23 7018 AT&T WorldNet Servic 15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic 32567 UNALLOCATED 12.14.170.0/24 7018 AT&T WorldNet Servic 13746 UNALLOCATED 12.24.56.0/24 7018 AT&T WorldNet Servic 32567 UNALLOCATED 12.25.107.0/24 7018 AT&T WorldNet Servic 26973 UNALLOCATED 12.39.152.0/24 7018 AT&T WorldNet Servic 26973 UNALLOCATED 12.39.154.0/23 7018 AT&T WorldNet Servic 26973 UNALLOCATED 12.39.159.0/24 7018 AT&T WorldNet Servic 32326 UNALLOCATED 12.40.49.0/24 7018 AT&T WorldNet Servic 25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic Complete listing at http://thyme.apnic.net/current/data-badAS Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 41.223.92.0/22 36936 >>UNKNOWN<< 41.223.176.0/22 36981 >>UNKNOWN<< 41.223.189.0/24 26452 Local Communications Networks 43.245.0.0/16 7502 Internetwork Kyoto 43.245.96.0/20 7502 Internetwork Kyoto 43.245.112.0/20 7502 Internetwork Kyoto 43.245.192.0/20 7502 Internetwork Kyoto 43.245.208.0/20 7502 Internetwork Kyoto 43.245.224.0/20 7502 Internetwork Kyoto 62.61.220.0/24 24974 Tachyon Europe BV - Wireless Complete listing at http://thyme.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:10 /10:25 /11:62 /12:174 /13:350 /14:627 /15:1192 /16:10662 /17:4823 /18:8391 /19:17402 /20:20778 /21:20625 /22:26667 /23:26514 /24:154117 /25:942 /26:1080 /27:575 /28:151 /29:8 /30:9 /31:0 /32:8 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 6389 2705 4173 bellsouth.net, inc. 4766 1408 1729 Korea Telecom (KIX) 17488 1291 1542 Hathway IP Over Cable Interne 1785 1206 1739 PaeTec Communications, Inc. 11492 1047 1120 Cable One 18566 1043 1062 Covad Communications 4323 969 1927 Time Warner Telecom 9583 949 1097 Sify Limited 10620 919 1013 TVCABLE BOGOTA 8452 914 992 TEDATA Complete listing at http://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:13 8:214 12:2143 13:7 15:21 16:3 17:5 20:36 24:1129 32:52 34:2 38:603 40:97 41:1719 43:1 44:2 47:24 52:6 55:2 56:2 57:25 58:606 59:610 60:458 61:962 62:1081 63:2009 64:3623 65:2392 66:3414 67:1761 68:980 69:2749 70:569 71:154 72:1682 73:2 74:1734 75:179 76:321 77:873 78:582 79:380 80:918 81:807 82:525 83:435 84:641 85:1028 86:379 87:680 88:383 89:1469 90:49 91:2536 92:399 93:1149 94:1168 95:1087 96:167 97:268 98:262 99:30 109:3 110:191 111:430 112:131 113:154 114:246 115:312 116:1135 117:572 118:329 119:772 120:122 121:652 122:1259 123:767 124:1050 125:1355 128:222 129:214 130:129 131:420 132:75 133:9 134:173 135:42 136:224 137:164 138:172 139:84 140:432 141:125 142:382 143:335 144:380 145:49 146:390 147:162 148:533 149:212 150:206 151:187 152:210 153:155 154:2 155:282 156:168 157:306 158:112 159:350 160:291 161:164 162:270 163:164 164:276 165:528 166:474 167:368 168:708 169:167 170:475 171:42 172:2 173:408 174:310 175:1 178:1 180:22 182:1 186:147 187:150 188:940 189:604 190:2973 192:5773 193:4251 194:3286 195:2756 196:1145 198:3548 199:3353 200:5188 201:1297 202:7833 203:8278 204:3894 205:2195 206:2391 207:2721 208:3942 209:3396 210:2542 211:1108 212:1582 213:1655 214:170 215:33 216:4281 217:1308 218:411 219:427 220:1110 221:442 222:322 End of report

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Network Ring
by ty chan 11 Sep '09

11 Sep '09

Dear all, I am in process of planning ring network to cover 15 POPs in City. Some technologies are chosen for consideration like SDH(Huawei), PVRST+(Cisco), RSTP(Zyxel), EAPS (extreme network) and MPLS(VPLS). The purpose is to provide L2 Ethernet connectivities from POPs to central point (DC) and ring protection. I know you all are in those network for years. can you give me some advises? Best regards, chanty

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Route table prefix monitoring
by Olsen, Jason 11 Sep '09

11 Sep '09

Howdy all, I've done a bit of digging through the Google machine and the MarkMail archive of NANOG (Which is a great resource I cannot plug enough - http://nanog.markmail.org) and have a few vague answers, but would like some deeper thought so I'm putting this out to the list. We recently had an event where, unbeknownst to us, a circuit went down and a /16 prefix inside our core routing table was withdrawn as a consequence of adjacency disappearing with that downed circuit (the fact that it went down without us knowing is being worked already). This caused a severe breakage for a legacy system that hasn't been touched in years, and tribal knowledge couldn't explain why we were seeing that legacy system going to a subnet that nobody knew anything about (again, documentation is something that's being worked already as a consequence of this). What I'm left thinking is that it would have been great if we'd had a snapshot of our core routing table as it stood hours or even days prior to this event occurring, so that I could compare it with our current "broken" state, so the team could have seen that subnet in the core table and what the next hop was for the prefix. Are there any tools that people are using to track when/what prefixes are added/withdrawn from their routing tables, or to pull the routing table as a whole at regular intervals for storage/comparison purposes? It looks like there's a plugin for NAGIOS, but I'm looking for suggestions on any other tools (commercial, open source, home grown) that we might take a look at. For reference, we are running Cisco as well as Juniper kit. Feel free to drop me your thoughts off-list. Thank you for any insight ahead of time, -Jason "Feren" Olsen

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Blacklist
by David Gower 11 Sep '09

11 Sep '09

We are an ISP and one of our users webmail account was hacked into (poor passwd). Spam was sent out from it. We are black listed on Hotmail. I can't find anyway to get off their list. Who do I contact? Thanks David Gower President Gower Computer Support, Inc. 903 597-9220

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NAP of Americas
by Xavier Banchon 11 Sep '09

11 Sep '09

Hi Fellows, Does anyone have issues with Internet connection through NAP of Americas? Kind Regards, Xavier Enviado desde mi BlackBerry de Movistar

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SA pigeon 'faster than broadband'
by William Allen Simpson 11 Sep '09

11 Sep '09

http://newsvote.bbc.co.uk/mpapps/pagetools/print/news.bbc.co.uk/2/hi/africa… Update needed for RFC 1149 (1 April 1990), A Standard for the Transmission of IP Datagrams on Avian Carriers

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NAP MIA peering problems
by Wolfgang Nagele 11 Sep '09

11 Sep '09

Hi, Anybody seeing peerings down at NAP Miami (198.32.124.0/23)? Regards, Wolfgang

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as702 looking glass?
by Serg Shubenkov 11 Sep '09

11 Sep '09

Folks, Does anyone know if Verizon (AS702) has a publicly accessable looking glass? -- Serg Shubenkov

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