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I'm looking for routing/switching guys near the SF Bay Area
by Thomas Cannon 16 Dec '11

16 Dec '11

Preferably with consulting experience. If that's you, please contact me directly. Thanks. Thomas Cannon CCDP, CCNP, BCNE, CISSP tcannon(a)c2company.com<mailto:tcannon@c2company.com>

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playing NICE
by bmanning＠vacation.karoshi.com 16 Dec '11

16 Dec '11

http://csrc.nist.gov/nice/framework/ its only a tad over 100 pages. :) the comment period has been extended to january 2012. something to read by the fire over the holiday. /bill

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Weekly Routing Table Report
by Routing Analysis Role Account 16 Dec '11

16 Dec '11

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG, CaribNOG and the RIPE Routing Working Group. Daily listings are sent to bgp-stats(a)lists.apnic.net For historical data, please see http://thyme.rand.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. Routing Table Report 04:00 +10GMT Sat 17 Dec, 2011 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 387142 Prefixes after maximum aggregation: 167902 Deaggregation factor: 2.31 Unique aggregates announced to Internet: 189021 Total ASes present in the Internet Routing Table: 39612 Prefixes per ASN: 9.77 Origin-only ASes present in the Internet Routing Table: 32512 Origin ASes announcing only one prefix: 15502 Transit ASes present in the Internet Routing Table: 5342 Transit-only ASes present in the Internet Routing Table: 145 Average AS path length visible in the Internet Routing Table: 4.3 Max AS path length visible: 33 Max AS path prepend of ASN (48687) 24 Prefixes from unregistered ASNs in the Routing Table: 1923 Unregistered ASNs in the Routing Table: 999 Number of 32-bit ASNs allocated by the RIRs: 2095 Number of 32-bit ASNs visible in the Routing Table: 1758 Prefixes from 32-bit ASNs in the Routing Table: 4191 Special use prefixes present in the Routing Table: 2 Prefixes being announced from unallocated address space: 90 Number of addresses announced to Internet: 2502485008 Equivalent to 149 /8s, 40 /16s and 228 /24s Percentage of available address space announced: 67.5 Percentage of allocated address space announced: 67.5 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 91.7 Total number of prefixes smaller than registry allocations: 163725 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 95726 Total APNIC prefixes after maximum aggregation: 31275 APNIC Deaggregation factor: 3.06 Prefixes being announced from the APNIC address blocks: 92115 Unique aggregates announced from the APNIC address blocks: 38521 APNIC Region origin ASes present in the Internet Routing Table: 4609 APNIC Prefixes per ASN: 19.99 APNIC Region origin ASes announcing only one prefix: 1248 APNIC Region transit ASes present in the Internet Routing Table: 726 Average APNIC Region AS path length visible: 4.3 Max APNIC Region AS path length visible: 18 Number of APNIC region 32-bit ASNs visible in the Routing Table: 123 Number of APNIC addresses announced to Internet: 631919968 Equivalent to 37 /8s, 170 /16s and 85 /24s Percentage of available APNIC address space announced: 80.1 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 131072-132095, 132096-133119 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 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, 133/8, 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, 223/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 146548 Total ARIN prefixes after maximum aggregation: 74859 ARIN Deaggregation factor: 1.96 Prefixes being announced from the ARIN address blocks: 118628 Unique aggregates announced from the ARIN address blocks: 48721 ARIN Region origin ASes present in the Internet Routing Table: 14807 ARIN Prefixes per ASN: 8.01 ARIN Region origin ASes announcing only one prefix: 5665 ARIN Region transit ASes present in the Internet Routing Table: 1571 Average ARIN Region AS path length visible: 4.0 Max ARIN Region AS path length visible: 25 Number of ARIN region 32-bit ASNs visible in the Routing Table: 14 Number of ARIN addresses announced to Internet: 804460224 Equivalent to 47 /8s, 243 /16s and 22 /24s Percentage of available ARIN address space announced: 63.9 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, 23/8, 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, 50/8, 52/8, 53/8, 54/8, 55/8, 56/8, 57/8, 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, 100/8, 104/8, 107/8, 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: 95151 Total RIPE prefixes after maximum aggregation: 51645 RIPE Deaggregation factor: 1.84 Prefixes being announced from the RIPE address blocks: 87257 Unique aggregates announced from the RIPE address blocks: 55070 RIPE Region origin ASes present in the Internet Routing Table: 16196 RIPE Prefixes per ASN: 5.39 RIPE Region origin ASes announcing only one prefix: 7990 RIPE Region transit ASes present in the Internet Routing Table: 2575 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 33 Number of RIPE region 32-bit ASNs visible in the Routing Table: 1222 Number of RIPE addresses announced to Internet: 494441160 Equivalent to 29 /8s, 120 /16s and 146 /24s Percentage of available RIPE address space announced: 79.7 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, 56320-58367 196608-198655 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 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, 176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 36850 Total LACNIC prefixes after maximum aggregation: 7994 LACNIC Deaggregation factor: 4.61 Prefixes being announced from the LACNIC address blocks: 36349 Unique aggregates announced from the LACNIC address blocks: 18889 LACNIC Region origin ASes present in the Internet Routing Table: 1557 LACNIC Prefixes per ASN: 23.35 LACNIC Region origin ASes announcing only one prefix: 443 LACNIC Region transit ASes present in the Internet Routing Table: 284 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 19 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 395 Number of LACNIC addresses announced to Internet: 94826888 Equivalent to 5 /8s, 166 /16s and 241 /24s Percentage of available LACNIC address space announced: 62.8 LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 262144-263167 plus ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 8509 Total AfriNIC prefixes after maximum aggregation: 2057 AfriNIC Deaggregation factor: 4.14 Prefixes being announced from the AfriNIC address blocks: 6551 Unique aggregates announced from the AfriNIC address blocks: 2061 AfriNIC Region origin ASes present in the Internet Routing Table: 498 AfriNIC Prefixes per ASN: 13.15 AfriNIC Region origin ASes announcing only one prefix: 156 AfriNIC Region transit ASes present in the Internet Routing Table: 108 Average AfriNIC Region AS path length visible: 4.5 Max AfriNIC Region AS path length visible: 25 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4 Number of AfriNIC addresses announced to Internet: 30843648 Equivalent to 1 /8s, 214 /16s and 163 /24s Percentage of available AfriNIC address space announced: 46.0 AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4766 2513 11104 971 Korea Telecom (KIX) 17974 1716 503 38 PT TELEKOMUNIKASI INDONESIA 7545 1632 303 86 TPG Internet Pty Ltd 4755 1517 385 158 TATA Communications formerly 7552 1491 1064 7 Vietel Corporation 9829 1170 989 28 BSNL National Internet Backbo 9583 1101 81 494 Sify Limited 4808 1077 2034 304 CNCGROUP IP network: China169 24560 996 385 167 Bharti Airtel Ltd., Telemedia 18101 964 122 157 Reliance Infocom Ltd Internet Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 6389 3479 3814 220 bellsouth.net, inc. 7029 2918 1017 200 Windstream Communications Inc 18566 2093 383 177 Covad Communications 1785 1855 680 121 PaeTec Communications, Inc. 4323 1620 1073 386 Time Warner Telecom 20115 1604 1549 626 Charter Communications 22773 1513 2909 105 Cox Communications, Inc. 30036 1460 261 677 Mediacom Communications Corp 19262 1388 4683 401 Verizon Global Networks 7018 1301 7013 852 AT&T WorldNet Services Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8402 1592 480 15 Corbina telecom 2118 1097 99 14 EUnet/RELCOM Autonomous Syste 15557 1035 2161 64 LDCOM NETWORKS 6830 647 1928 413 UPC Distribution Services 34984 625 132 195 BILISIM TELEKOM 20940 549 177 438 Akamai Technologies European 12479 539 630 48 Uni2 Autonomous System 3320 532 8162 398 Deutsche Telekom AG 3292 480 2106 407 TDC Tele Danmark 8866 462 134 27 Bulgarian Telecommunication C Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 10620 1717 318 155 TVCABLE BOGOTA 28573 1577 1064 75 NET Servicos de Comunicao S.A 8151 1458 2989 347 UniNet S.A. de C.V. 7303 1248 752 176 Telecom Argentina Stet-France 27947 631 73 93 Telconet S.A 22047 582 322 17 VTR PUNTO NET S.A. 6503 555 434 68 AVANTEL, S.A. 7738 551 1050 31 Telecomunicacoes da Bahia S.A 3816 546 237 89 Empresa Nacional de Telecomun 11172 529 102 96 Servicios Alestra S.A de C.V Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 8452 1035 958 13 TEDATA 24863 790 146 36 LINKdotNET AS number 3741 281 939 230 The Internet Solution 6713 243 647 17 Itissalat Al-MAGHRIB 15706 242 32 6 Sudatel Internet Exchange Aut 33776 240 13 8 Starcomms Nigeria Limited 29571 217 17 13 Ci Telecom Autonomous system 12258 195 28 60 Vodacom Internet Company 24835 188 80 8 RAYA Telecom - Egypt 16637 160 664 82 MTN Network Solutions Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 6389 3479 3814 220 bellsouth.net, inc. 7029 2918 1017 200 Windstream Communications Inc 4766 2513 11104 971 Korea Telecom (KIX) 18566 2093 383 177 Covad Communications 1785 1855 680 121 PaeTec Communications, Inc. 10620 1717 318 155 TVCABLE BOGOTA 17974 1716 503 38 PT TELEKOMUNIKASI INDONESIA 7545 1632 303 86 TPG Internet Pty Ltd 4323 1620 1073 386 Time Warner Telecom 20115 1604 1549 626 Charter Communications Complete listing at http://thyme.rand.apnic.net/current/data-ASnet Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 7029 2918 2718 Windstream Communications Inc 18566 2093 1916 Covad Communications 1785 1855 1734 PaeTec Communications, Inc. 17974 1716 1678 PT TELEKOMUNIKASI INDONESIA 8402 1592 1577 Corbina telecom 10620 1717 1562 TVCABLE BOGOTA 7545 1632 1546 TPG Internet Pty Ltd 4766 2513 1542 Korea Telecom (KIX) 28573 1577 1502 NET Servicos de Comunicao S.A 7552 1491 1484 Vietel Corporation Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Network Transit AS Description 15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic 32567 UNALLOCATED 12.14.170.0/24 4323 Time Warner Telecom 32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom 25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic 13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic 23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic 17300 UNALLOCATED 12.45.103.0/24 7018 AT&T WorldNet Servic 17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies, 16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic 32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser Complete listing at http://thyme.rand.apnic.net/current/data-badAS Prefixes from private and non-routed address space (Global) ----------------------------------------------------------- Prefix Origin AS Description 128.0.0.0/21 12654 RIPE NCC RIS Project 128.0.24.0/24 12654 RIPE NCC RIS Project Complete listing at http://thyme.rand.apnic.net/current/data-dsua Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 37.9.192.0/21 25424 INTERNEXT 2000 S.R.O. 37.10.0.0/17 23456 32-bit ASN transition 41.222.79.0/24 36938 >>UNKNOWN<< 41.223.92.0/22 36936 >>UNKNOWN<< 62.61.220.0/24 24974 Tachyon Europe BV - Wireless 62.61.221.0/24 24974 Tachyon Europe BV - Wireless 64.21.192.0/20 11610 Internet Nebraska Corporation 64.21.212.0/22 11610 Internet Nebraska Corporation 64.21.216.0/21 11610 Internet Nebraska Corporation 66.129.0.0/19 3901 Higher Technology Services, I Complete listing at http://thyme.rand.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 /9:12 /10:27 /11:81 /12:237 /13:465 /14:814 /15:1445 /16:12061 /17:6115 /18:10180 /19:20115 /20:27947 /21:28173 /22:38333 /23:35855 /24:201635 /25:1180 /26:1407 /27:784 /28:169 /29:56 /30:14 /31:0 /32:18 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 7029 2546 2918 Windstream Communications Inc 6389 2124 3479 bellsouth.net, inc. 18566 2042 2093 Covad Communications 10620 1612 1717 TVCABLE BOGOTA 8402 1569 1592 Corbina telecom 30036 1420 1460 Mediacom Communications Corp 11492 1105 1142 Cable One 1785 1059 1855 PaeTec Communications, Inc. 7011 1051 1168 Citizens Utilities 15557 991 1035 LDCOM NETWORKS Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:451 2:415 4:15 5:1 6:3 8:360 12:1944 13:1 14:562 15:11 16:3 17:7 20:9 23:74 24:1695 27:1122 31:734 32:67 33:2 34:2 36:4 38:776 39:1 40:114 41:2992 42:78 43:1 44:3 46:1136 47:3 49:278 50:464 52:13 55:5 56:2 57:44 58:958 59:485 60:342 61:1185 62:932 63:1964 64:4112 65:2302 66:4371 67:2005 68:1183 69:3135 70:919 71:378 72:1776 74:2637 75:432 76:319 77:933 78:856 79:442 80:1171 81:848 82:528 83:530 84:570 85:1163 86:733 87:899 88:342 89:1578 90:247 91:4368 92:540 93:1505 94:1321 95:1047 96:397 97:286 98:766 99:38 100:1 101:130 103:561 106:11 107:113 108:99 109:1403 110:672 111:825 112:379 113:490 114:601 115:708 116:887 117:716 118:894 119:1244 120:343 121:674 122:1559 123:1028 124:1379 125:1340 128:556 129:189 130:182 131:584 132:162 133:21 134:225 135:54 136:213 137:151 138:286 139:124 140:493 141:255 142:382 143:388 144:490 145:67 146:477 147:222 148:634 149:273 150:164 151:192 152:445 153:172 154:7 155:382 156:210 157:366 158:155 159:499 160:341 161:221 162:362 163:187 164:521 165:387 166:541 167:459 168:816 169:146 170:829 171:93 172:4 173:1793 174:596 175:416 176:325 177:436 178:1143 180:1204 181:39 182:670 183:251 184:403 185:1 186:1426 187:783 188:954 189:1178 190:5290 192:5981 193:5191 194:4280 195:3364 196:1283 197:173 198:3629 199:4232 200:5512 201:1714 202:8480 203:8509 204:4345 205:2406 206:2668 207:2835 208:4024 209:3560 210:2750 211:1475 212:1972 213:1802 214:800 215:93 216:4927 217:1499 218:584 219:351 220:1250 221:529 222:326 223:264 End of report

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Is AS information useful for security?
by Joe Loiacono 16 Dec '11

16 Dec '11

Is a good knowledge of either origin-AS, or next-AS with respect to flows valuable in establishing, monitoring, or re-enforcing a security posture? In what ways? TIA, Joe

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Comcast Mail Admin
by Peter Kristolaitis 16 Dec '11

16 Dec '11

Apologies to the list for the noise, but if there's a clueful Comcast mail admin on list, can you please get in touch with me off list? My employer's network is having problems sending mail to your domain, and several attempts to clear it up using the "Blocked Provider Request Form" have failed (it looks like the comments I provided on the form aren't being read, as the link I provided to some of our log snippets showing the problem hasn't been hit). Thanks! - Peter Kristolaitis <http://www.comcastsupport.com/rbl>

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BGP and Firewalls...
by Gregory Croft 16 Dec '11

16 Dec '11

Hi All, Does anyone have any experience with using firewalls as edge devices when BGP is concerned? Specifically the Palo Alto series of devices. If so please contact me off list. Thank you. Thank you, Gregory S. Croft

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De-bogon not possible via arin policy.
by Cameron Byrne 16 Dec '11

16 Dec '11

Fyi, I just was rejected from arin for an ipv4 allocation. I demonstrated I own ~100k ipv4 addresses today. My customers use over 10 million bogon / squat space ip addresses today, and I have good attested data on that. But all I can qualify for is a /18, and then in 3 months maybe a /17. This is called slow start ? For an established business? Just fyi, de-bogoning , or private rfc 1918 is not really an option even with strong and consistent demonstrate load. Any suggestions on how to navigate this policy ?

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[sort of off topic] An Open Letter From Internet Engineers to the U.S. Congress
by Network IP Dog 16 Dec '11

16 Dec '11

I wonder how this will go in the USA and what trickle effect it might have on us if Senator Conroy gets wind of it. An Open Letter From Internet Engineers to the U.S. Congress. https://www.eff.org/deeplinks/2011/12/internet-inventors-warn-against-sopa-a nd-pipa Ephesians 4:32 & Cheers!!! Andy

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Cybersecurity Investments Survey - request for participation
by Rowe, Brent 16 Dec '11

16 Dec '11

All - See below a solicitation for a NIST-sponsored survey to help identify investments in cyber security that would have the greatest economic impact. All individuals with knowledge of cyber security gaps from an industry perspective are welcome to participate. As an additional incentive, participants will be entered into a raffle for 1 of 10 iPad 2's. Thanks to anyone willing to participate. Feel free to email me with any questions. Brent Rowe, Study Director ------------------------------------------------------------------------ ----------------- ECONOMIC ANALYSIS OF THE U.S. TECHNOLOGY-BASED CYBER SECURITY GAPS - SURVEY INVITATION U.S. industries spend billions of dollars each year securing their information technology (IT) assets. Yet, these businesses still suffer significant economic losses from cyber attacks. Many organizations may not have the technical ability or capacity to identify or address attacks, while other organizations with very complex communications infrastructures may make investments only in response to attacks or breaches. The National Institute of Standards and Technology (NIST) and RTI International are asking IT security managers around the world to participate in a 15-minute survey. Respondents taking the survey will help both the public and private sectors identify inadequacies in the technology-based cybersecurity infrastructure and quantify the economic benefits of these improvements in these areas. Your participation will help ensure that new investments by public agencies and private sector organizations in the cybersecurity infrastructure will be targeted at achieving the greatest economic benefit to organizations such as yours. Go now to https://cybersurvey.rti.org/. To thank you for your participation, you can enter a raffle to win 1 of 10 iPad 2s! We will notify winners by email and telephone in January 2012. For questions or comments about this survey, please contact Igor Pokryshevskiy at (415) 848-1378 (Pacific Time) or igor(a)rti.org. Brent R. Rowe Senior Economist Technology Economics & Policy RTI International 114 Sansome St., Suite 500 San Francisco, CA 94104 (415) 848-1317 (415) 848-1330 fax

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Range using single-mode SFPs across multi-mode fiber
by oliver rothschild 15 Dec '11

15 Dec '11

Thanks to all who responded to my clumsy first question (both on matters of etiquette and technology). The group I work with (we are a small project acting as a last mile provider) was in the midst of deploying this solution when I posed the question. We put the single mode Juniper SFPs (LX) on to a run of approximately 1670 meters. We successfully established a 1G ethernet connection. Testing to date has been meager, but shows that the link is viable. Under significant load there is some minor packet loss. Since the link far exceeds the amount of data it required, we have decided to continue using it. Interestingly neither interface showed any physical errors. v/r, Oliver Rothschild Network Engineer III

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