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New IANA IPv4 allocations to ARIN (74/8, 75/8, 76/8) and LACNIC (189/8, 190/8)
by Doug Barton 17 Jun '05

17 Jun '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Greetings, This is to inform you that on 17 June 2005 the IANA has allocated the following two (2) IPv4 /8 blocks to LACNIC: 189/8, 190/8 and three (3) IPv4 /8 blocks to ARIN: 74/8, 75/8, 76/8 For a full list of IANA IPv4 allocations please see: <http://www.iana.org/assignments/ipv4-address-space> - -- Doug Barton General Manager, The Internet Assigned Numbers Authority -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (MingW32) iD8DBQFCs2C8wtDPyTesBYwRAscHAKCQEWrG96z/1FmhZWl1Mrt13hzBngCeNUCF SldR9Wbc4WTNoLoI7dJlKJc= =cq00 -----END PGP SIGNATURE-----

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NANOG Program Committee Announcement
by Steve Feldman 17 Jun '05

17 Jun '05

I am pleased to announce that the three new members of the NANOG Committee are: Joe Abley Henry (Hank) Kilmer Christopher Morrow Although we had many fine, well-qualified candidates to choose among, we were only able to select people for the three openings. Please join me in welcoming Joe, Hank, and Chris to the PC. As always, our focus now turns to producing the finest possible program for the October meeting in Los Angeles. For the PC, Steve Feldman chair

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Weekly Routing Table Report
by Routing Table Analysis 17 Jun '05

17 Jun '05

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 If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 04:00 +10GMT Sat 18 Jun, 2005 Analysis Summary ---------------- BGP routing table entries examined: 165397 Prefixes after maximum aggregation: 95434 Unique aggregates announced to Internet: 79395 Total ASes present in the Internet Routing Table: 19882 Origin-only ASes present in the Internet Routing Table: 17316 Origin ASes announcing only one prefix: 8118 Transit ASes present in the Internet Routing Table: 2566 Transit-only ASes present in the Internet Routing Table: 73 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 24 Prefixes from unregistered ASNs in the Routing Table: 17 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 15 Number of addresses announced to Internet: 1401700320 Equivalent to 83 /8s, 140 /16s and 63 /24s Percentage of available address space announced: 37.8 Percentage of allocated address space announced: 59.4 Percentage of available address space allocated: 63.7 Total number of prefixes smaller than registry allocations: 78031 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 34130 Total APNIC prefixes after maximum aggregation: 15802 Prefixes being announced from the APNIC address blocks: 32016 Unique aggregates announced from the APNIC address blocks: 15851 APNIC Region origin ASes present in the Internet Routing Table: 2291 APNIC Region origin ASes announcing only one prefix: 670 APNIC Region transit ASes present in the Internet Routing Table: 344 Average APNIC Region AS path length visible: 4.4 Max APNIC Region AS path length visible: 17 Number of APNIC addresses announced to Internet: 187147392 Equivalent to 11 /8s, 39 /16s and 164 /24s Percentage of available APNIC address space announced: 69.4 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911 APNIC Address Blocks 58/7, 60/7, 124/7, 126/8, 202/7, 210/7, 218/7, 220/7 and 222/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 89145 Total ARIN prefixes after maximum aggregation: 54093 Prefixes being announced from the ARIN address blocks: 69679 Unique aggregates announced from the ARIN address blocks: 25491 ARIN Region origin ASes present in the Internet Routing Table: 10019 ARIN Region origin ASes announcing only one prefix: 3671 ARIN Region transit ASes present in the Internet Routing Table: 937 Average ARIN Region AS path length visible: 4.3 Max ARIN Region AS path length visible: 18 Number of ARIN addresses announced to Internet: 250583808 Equivalent to 14 /8s, 239 /16s and 155 /24s Percentage of available ARIN address space announced: 71.1 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 ARIN Address Blocks 24/8, 63/8, 64/6, 68/7, 70/6, 198/7, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 31449 Total RIPE prefixes after maximum aggregation: 21642 Prefixes being announced from the RIPE address blocks: 28502 Unique aggregates announced from the RIPE address blocks: 19126 RIPE Region origin ASes present in the Internet Routing Table: 6755 RIPE Region origin ASes announcing only one prefix: 3554 RIPE Region transit ASes present in the Internet Routing Table: 1118 Average RIPE Region AS path length visible: 5.2 Max RIPE Region AS path length visible: 24 Number of RIPE addresses announced to Internet: 208788800 Equivalent to 12 /8s, 113 /16s and 221 /24s Percentage of available RIPE address space announced: 73.2 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 RIPE Address Blocks 62/8, 80/5, 88/8, 188/8, 193/8, 194/7, 212/7 and 217/8 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 8986 Total LACNIC prefixes after maximum aggregation: 3127 Prefixes being announced from the LACNIC address blocks: 7348 Unique aggregates announced from the LACNIC address blocks: 4281 LACNIC Region origin ASes present in the Internet Routing Table: 621 LACNIC Region origin ASes announcing only one prefix: 188 LACNIC Region transit ASes present in the Internet Routing Table: 112 Average LACNIC Region AS path length visible: 5.2 Max LACNIC Region AS path length visible: 21 Number of LACNIC addresses announced to Internet: 20236832 Equivalent to 1 /8s, 52 /16s and 202 /24s Percentage of available LACNIC address space announced: 60.3 LACNIC AS Blocks 26592-26623, 27648-28671, plus ERX transfers LACNIC Address Blocks 200/7 AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 1664 Total AfriNIC prefixes after maximum aggregation: 770 Prefixes being announced from the AfriNIC address blocks: 1015 Unique aggregates announced from the AfriNIC address blocks: 781 AfriNIC Region origin ASes present in the Internet Routing Table: 128 AfriNIC Region origin ASes announcing only one prefix: 35 AfriNIC Region transit ASes present in the Internet Routing Table: 16 Average AfriNIC Region AS path length visible: 4.7 Max AfriNIC Region AS path length visible: 12 Number of AfriNIC addresses announced to Internet: 2294272 Equivalent to 0 /8s, 35 /16s and 2 /24s Percentage of available AfriNIC address space announced: 6.8 AfriNIC AS Blocks 36864-37887 & ERX transfers AfriNIC Address Blocks 41/8, 196/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4134 916 5150 192 CHINANET-BACKBONE 1221 760 1454 542 Telstra Pty Ltd 9583 757 76 13 Sify Limited 4755 632 247 140 Videsh Sanchar Nigam Ltd. Aut 4766 596 3413 279 Korea Telecom (KIX) 7545 500 104 71 TPG Internet Pty Ltd 17676 436 6589 75 Softbank BB Corp. 9443 364 77 76 Primus Telecommunications 9929 356 221 48 China Netcom Corp. 10036 345 65 311 C&M Communication Co. Ltd. 2907 339 1805 316 SINET Japan 9498 321 83 61 BHARTI BT INTERNET LTD. 17557 317 22 152 Pakistan Telecom 7474 312 271 216 SingTel Optus Pty Ltd 4802 282 49 161 Wantree Development 4808 282 245 160 CNCGROUP IP network: China169 17974 265 65 14 PT TELEKOMUNIKASI INDONESIA 18302 261 108 148 SK Global co., Ltd 703 253 276 207 UUNET - Commercial IP service 2764 253 238 199 AAPT Limited ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 7018 1497 6461 974 AT&T WorldNet Services 174 1343 5793 1069 Cogent Communications 4323 1121 647 217 Time Warner Telecom 721 1110 21787 313 DLA Systems Automation Center 701 1010 8168 853 UUNET Technologies, Inc. 6197 927 526 429 BellSouth Network Solutions, 2386 892 527 659 AT&T Data Communications Serv 1239 891 2871 644 Sprint 18566 819 224 7 Covad Communications 20115 644 492 317 Charter Communications 209 631 3506 497 Qwest 27364 565 43 18 Armstrong Cable Services 3356 557 10821 427 Level 3 Communications, LLC 3602 541 123 100 Sprint Canada, Inc. 3561 538 2385 422 Savvis 852 526 1093 388 Telus Advanced Communications 22773 495 1188 23 Cox Communications, Inc. 5668 489 115 25 CenturyTel Internet Holdings, 7725 487 60 15 MediaOne 6198 464 416 218 BellSouth Network Solutions, RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 597 2001 489 UUNET - Commercial IP service 3320 306 3232 242 Deutsche Telekom AG 3301 294 1080 282 TeliaNet Sweden 8220 270 469 266 COLT Telecommunications 680 252 2041 238 DFN-IP service G-WiN 8708 233 254 216 Romania Data Systems S.A. 3246 226 488 221 Song Networks 1257 198 712 174 SWIPnet Swedish IP Network 5515 179 778 129 Sonera Solution Autonomous Sy 786 176 1794 176 The JANET IP Service 6746 169 47 147 Dynamic Network Technologies, 719 168 340 101 LANLINK autonomous system 3269 168 1520 71 TELECOM ITALIA 5400 164 285 137 BT Ignite European Backbone 8866 158 21 11 Bulgarian Telecommunication C 3300 155 184 87 AUCS Communications Services 6830 138 529 28 UPC Distribution Services 9121 136 271 34 TTnet Autonomous System 3352 135 1256 37 Ibernet, Internet Access Netw 25186 135 137 95 France Telecom Transpac's Tra LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 404 601 166 UniNet S.A. de C.V. 16814 264 16 12 NSS, S.A. 11172 219 98 53 Servicios Alestra S.A de C.V 11664 198 19 23 Keytech SA 6147 197 110 21 Telefonica Del Peru 14117 152 9 5 Telefonica del Sur S.A. 7303 149 68 21 Telecom Argentina Stet-France 6505 132 90 89 Global One Communicaoes Ltda 22047 131 96 6 VTR PUNTO NET S.A. 11556 130 64 3 Cable-Wireless Panama 19632 109 14 5 Metropolis Intercom S.A. 13999 107 52 9 Mega Cable S.A. de C.V. 18822 107 7 13 TELEFONICA MANQUEHUE 19169 105 7 20 Telconet 10481 101 40 7 Prima S.A. 6503 100 146 72 AVANTEL, S.A. 21826 95 13 20 INTERCABLE 22927 95 73 25 TELEFONICA DE ARGENTINA 5639 94 12 9 Telecommunications Services o 23216 93 24 23 RAMtelecom Telecomunicaciones AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 3741 266 637 223 The Internet Solution 5536 119 15 17 Internet Egypt Network 20928 95 16 1 Noor Advanced Technologies AS 2018 91 295 86 Tertiary Education Network 8452 82 28 6 TEDATA 2905 75 266 67 The Internetworking Company o 6713 59 54 8 Itissalat Al-MAGHRIB 24835 57 34 6 RAYA Telecom - Egypt 9129 45 3 3 UUNET Kenya 12455 40 6 3 Jambonet Autonomous system 5713 36 142 29 Telkom SA Ltd 15475 34 84 4 Nile Online 15706 31 8 3 Sudatel Internet Exchange Aut 8524 25 1 4 AUCEGYPT Autonomous System 16637 22 10 19 Johnnic e-Ventures 33765 20 3 8 TANZANIA TELECOMMUNICATIONS C 10798 19 1 11 Standard Bank of South Africa 23889 19 5 8 MAURITIUS TELECOM 21491 18 1 1 UTL On-line is RF broadband I 12258 17 3 11 Vodacom Internet Company Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4323 1121 904 Time Warner Telecom 18566 819 812 Covad Communications 721 1110 797 DLA Systems Automation Center 9583 757 744 Sify Limited 4134 916 724 CHINANET-BACKBONE 27364 565 547 Armstrong Cable Services 6197 927 498 BellSouth Network Solutions, 4755 632 492 Videsh Sanchar Nigam Ltd. Aut 22773 495 472 Cox Communications, Inc. 7725 487 472 MediaOne 5668 489 464 CenturyTel Internet Holdings, 3602 541 441 Sprint Canada, Inc. 7545 500 429 TPG Internet Pty Ltd 6467 427 393 E.Spire Communications, Inc. 17676 436 361 Softbank BB Corp. 6140 403 330 ImpSat 20115 644 327 Charter Communications 4766 596 317 Korea Telecom (KIX) 9929 356 308 China Netcom Corp. 19262 405 301 Verizon Global Networks List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 65050 PRIVATE 168.96.148.0/24 6140 ImpSat 65004 PRIVATE 200.0.113.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.0.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.1.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.2.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.3.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.4.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.5.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.6.0/24 28477 Universidad Autonoma 65004 PRIVATE 200.4.7.0/24 28477 Universidad Autonoma 64512 PRIVATE 200.61.32.0/23 11664 Keytech SA 64512 PRIVATE 200.61.62.0/23 11664 Keytech SA 64512 PRIVATE 200.80.154.0/23 11664 Keytech SA 65005 PRIVATE 203.200.197.0/24 4755 Videsh Sanchar Nigam 65444 PRIVATE 212.25.125.0/24 8551 Bezeq International 65529 PRIVATE 216.21.199.0/24 14697 VDot.Net 65529 PRIVATE 216.152.237.0/24 14697 VDot.Net Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 50.160.0.0/13 1221 Telstra Pty Ltd 132.0.0.0/10 721 DLA Systems Automation Center 137.0.0.0/13 721 DLA Systems Automation Center 158.0.0.0/13 721 DLA Systems Automation Center 172.32.0.0/24 7011 Citizens Utilities 192.43.230.0/24 7575 Australian Academic and Rease 192.44.0.0/24 5501 Fraunhofer Gesellschaft 192.44.0.0/19 702 UUNET - Commercial IP service 192.70.164.0/24 25689 National Research Council of 192.84.205.0/24 719 LANLINK autonomous system 192.119.135.0/24 270 NASA 192.135.50.0/24 7018 AT&T WorldNet Services 192.169.0.0/23 3970 RGnet, Inc. 192.172.0.0/19 721 DLA Systems Automation Center 192.200.100.0/24 7018 AT&T WorldNet Services Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:18 /9:3 /10:8 /11:15 /12:73 /13:159 /14:310 /15:592 /16:8424 /17:2593 /18:4439 /19:10410 /20:11300 /21:9265 /22:12739 /23:13788 /24:90295 /25:338 /26:290 /27:166 /28:42 /29:28 /30:69 /31:0 /32:33 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 18566 803 819 Covad Communications 6197 755 927 BellSouth Network Solutions, 7018 688 1497 AT&T WorldNet Services 2386 607 892 AT&T Data Communications Serv 9583 574 757 Sify Limited 27364 556 565 Armstrong Cable Services 4323 542 1121 Time Warner Telecom 7725 458 487 MediaOne 4766 414 596 Korea Telecom (KIX) 5668 403 489 CenturyTel Internet Holdings, 1239 379 891 Sprint 702 369 597 UUNET - Commercial IP service 6198 338 464 BellSouth Network Solutions, 10036 335 345 C&M Communication Co. Ltd. 7011 304 354 Citizens Utilities 6467 294 427 E.Spire Communications, Inc. 15270 282 304 PaeTec.net -a division of Pae 20115 280 644 Charter Communications 9929 275 356 China Netcom Corp. 174 274 1343 Cogent Communications Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:4 8:15 12:1547 13:1 15:9 16:2 17:3 18:3 20:4 24:1172 30:2 32:69 33:4 38:131 40:54 44:3 47:2 52:4 55:2 56:3 57:27 58:91 59:47 60:54 61:784 62:625 63:1874 64:2775 65:2085 66:2908 67:586 68:537 69:1048 70:116 71:9 72:232 80:584 81:557 82:429 83:274 84:207 85:252 86:24 128:186 129:172 130:87 131:296 132:38 133:1 134:145 135:39 136:133 137:69 138:168 139:60 140:195 141:99 142:149 143:145 144:192 145:33 146:286 147:108 148:315 149:171 150:105 151:65 152:107 153:87 154:5 155:142 156:78 157:97 158:160 159:172 160:77 161:69 162:326 163:92 164:211 165:179 166:156 167:237 168:427 169:140 170:311 171:8 172:1 192:5727 193:3185 194:2401 195:1559 196:660 198:3926 199:3323 200:4004 201:169 202:5822 203:6343 204:3800 205:2051 206:2531 207:2841 208:2058 209:3319 210:1709 211:842 212:1219 213:1319 214:255 215:32 216:3502 217:1152 218:207 219:108 220:391 221:232 222:110 End of report

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RE: AT&T outage?
by Jonathan M. Slivko 17 Jun '05

17 Jun '05

I should probbably say my equipment on AT&T's IP network - not the core network. -- Jonathan M. Slivko - jonathan(a)slivko.org "Linux: The Choice for the GNU Generation" - http://www.linux.org/ - Don't fear the penguin. .^. /V\ /( )\ ^^-^^ He's here to help. -----Original Message----- From: Matt Taber [mailto:tabes@wmis.net] Sent: Friday, June 17, 2005 1:14 PM To: jonathan(a)slivko.org Subject: Re: AT&T outage? Where in GR did you see that alarm for AT&T? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Matt Taber tabes(a)wmis.net WMIS Internet http://www.wmis.net 616-281-9647 1-888-482-9647 "Accelerate ... It's a Speed Thing" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jonathan M. Slivko wrote: > Hmmmm..... I saw some alarms on equipment on AT&T's IP network in Grand > Rapids, MI a while ago. The alarm only lasted 10-15 minutes though. > > -- > Jonathan M. Slivko - jonathan(a)slivko.org > "Linux: The Choice for the GNU Generation" > - http://www.linux.org/ - > > Don't fear the penguin. > .^. > /V\ > /( )\ > ^^-^^ > He's here to help. > > -----Original Message----- > From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Tom > Sands > Sent: Friday, June 17, 2005 12:57 PM > To: Jim McBurnett > Cc: nanog(a)merit.edu > Subject: Re: AT&T outage? > > > Only issue we've seen is a number of people connecting Cogent to AT&T in > DFW. > > > Jim McBurnett wrote: > > >>Has anyone seen a major issue out of Atlanta with AT&T... >> >>Thanks, >>Jim >> >> >> > >

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AT&T outage?
by Jim McBurnett 17 Jun '05

17 Jun '05

Has anyone seen a major issue out of Atlanta with AT&T... Thanks, Jim

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Re: Email peering (Was: Economics of SPAM [Was: Micorsoft's SenderIDAuthentication......?]
by Ben Hubbard 17 Jun '05

17 Jun '05

Michael.Dillon(a)btradianz.com said: > That is something that businesses will pay for. > > But first, ISPs have to put their hands up and take > collective responsibility for Internet email as a service > that has value and not just as some kind of loss leader > for Internet access services. Many large organizations already have already, in a case by case way, set up private mail peering with others they exchange large volumes of mail with. This "trusted traffic" is often able to bypass the expense and delay of the spam-filter farm, making the cost and hassle of a parallel mail infrastructure worthwhile to them, and everyone is happy. There is no reason you can't pick another port, modify one of the many FOSS mail servers out there to do whatever it is you are proposing, and start providing this kind of thing on a more formal basis. Call it an email toll-road. (hmmmmm, would a toll-road be troll free? I might pay for that). If you are able to create a solution that works, and that people will pay for, then you'll be happy. Since it works in parallel, it won't disrupt anyone who doesn't want to play along, so they won't be anymore unhappy than they are now. I don't think what you have been talking about so far will work, and I don't think I'm alone in that. But hey, prove me wrong, and maybe someday I'll be writing a check to you to make sure I get email every day. Best, Ben

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Re: The Cidr Report
by Hank Nussbacher 17 Jun '05

17 Jun '05

I was hoping the report would be cleaned up by now but it hasn't so sorry for the multiple list post. The Bogon section is IMHO, broken. Taking just the 1st line as an example: Prefix Origin AS AS Description Unallocated block 3.0.0.0/8 AS80 GE-CRD - General Electric Company 0.0.0.0 - 3.0.0.0 3.0.0.0/8 is allocated, as is AS80. I suspect the algorithm, which determines the unallocated block of 0.0.0.0 - 3.0.0.0 to be somewhat broken. There are thousands of lines like that. The bogus AS section also appears to be broken. -Hank

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verisign
by Micah McNelly 16 Jun '05

16 Jun '05

Can someone with verisign operations please contact me offlist. Thanks! -- /m "I bet the human brain is a kludge." - Marvin Minsky

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Best Practice where BGP router is "distance" from client
by Sam Stickland 16 Jun '05

16 Jun '05

Hi, I'm wondering what seen as best practice in this network layout: cisco6500 ==== Network Cloud ==== cisco3550 --- Client The client needs a full BGP feed, which of course the 3550 is unable to provide, but the cisco 6500 can. The network cloud is relatively simple, and is running IP. There's a few options: 1) Create a VLAN all the way back from the client to the cisco 6500, and rely on STP/RSTP to provide redundancy over the cloud 2a) Get the client to form a BGP session with the cisco3550 and announce there network(s) to it. The cisco3550 announces our internal address range to the client. Over the top of the this another BGP (multihop) is setup between the client and the 6500. Layer3 protocols (in this case OSPF) provide redundancy in the cloud. Traffic entering our network for the client will be routed straight to the cisco 3550. Traffic from the client will be backhauled all the way to the cisco 6500 before being sent on it's way. 2b) Same as 2a) but with next-hop-unchanged configured on the cisco6500. This should be that traffic leaving the client will be routed from the cisco3550 to the most appropiate network exit-point. The only problem I can see with this senario is if private loopback addresses are in use on the iBGP sessions. Thoughts? Are there any nasty gotcha's I missed, or pain to be encounted later?

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RE: Document Action: 'BGP Wedgies' to Informational RFC
by Church, Chuck 15 Jun '05

15 Jun '05

Will sharply 'pulling up' the MED on a rear-facing peer clear the wedgie, or make it worse??? Sorry, couldn't resist... Chuck -----Original Message----- From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Fergie (Paul Ferguson) Sent: Wednesday, June 15, 2005 1:29 PM To: nanog(a)merit.edu Subject: FWD: Document Action: 'BGP Wedgies' to Informational RFC Direct operational relevence, methinks. FYI. - ferg -- The IESG <iesg-secretary(a)ietf.org> wrote: The IESG has approved the following document: - 'BGP Wedgies ' <draft-ietf-grow-bgp-wedgies-03.txt> as an Informational RFC This document is the product of the Global Routing Operations Working Group. The IESG contact persons are David Kessens and Bert Wijnen. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-grow-bgp-wedgies-03.txt Technical Summary It has commonly been assumed that the Border Gateway Protocol (BGP) is a tool for distributing reachability information in a manner that creates forwarding paths in a deterministic manner. In this memo we will describe a class of BGP configurations for which there is more than one potential outcome, and where forwarding states other than the intended state are equally stable, and that the stable state where BGP converges may be selected by BGP in a non-deterministic manner. These stable, but unintended, BGP states are termed here "BGP Wedgies". Working Group Summary The Grow Working Group came to consensus on this document. Protocol Quality This document was reviewed for the IESG by David Kessens. -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg(a)netzero.net or fergdawg(a)sbcglobal.net ferg's tech blog: http://fergdawg.blogspot.com/

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