October 2015 - Test - lists.nanog.org

Weekly Routing Table Report
by Routing Analysis Role Account 02 Oct '15

02 Oct '15

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, 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 03 Oct, 2015 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 564808 Prefixes after maximum aggregation (per Origin AS): 210720 Deaggregation factor: 2.68 Unique aggregates announced (without unneeded subnets): 274629 Total ASes present in the Internet Routing Table: 51616 Prefixes per ASN: 10.94 Origin-only ASes present in the Internet Routing Table: 36653 Origin ASes announcing only one prefix: 16084 Transit ASes present in the Internet Routing Table: 6419 Transit-only ASes present in the Internet Routing Table: 172 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 46 Max AS path prepend of ASN ( 55644) 41 Prefixes from unregistered ASNs in the Routing Table: 1060 Unregistered ASNs in the Routing Table: 404 Number of 32-bit ASNs allocated by the RIRs: 11198 Number of 32-bit ASNs visible in the Routing Table: 8544 Prefixes from 32-bit ASNs in the Routing Table: 32281 Number of bogon 32-bit ASNs visible in the Routing Table: 15 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 419 Number of addresses announced to Internet: 2811706304 Equivalent to 167 /8s, 151 /16s and 59 /24s Percentage of available address space announced: 75.9 Percentage of allocated address space announced: 75.9 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 97.6 Total number of prefixes smaller than registry allocations: 186802 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 143326 Total APNIC prefixes after maximum aggregation: 39870 APNIC Deaggregation factor: 3.59 Prefixes being announced from the APNIC address blocks: 150997 Unique aggregates announced from the APNIC address blocks: 59805 APNIC Region origin ASes present in the Internet Routing Table: 5100 APNIC Prefixes per ASN: 29.61 APNIC Region origin ASes announcing only one prefix: 1200 APNIC Region transit ASes present in the Internet Routing Table: 897 Average APNIC Region AS path length visible: 4.5 Max APNIC Region AS path length visible: 45 Number of APNIC region 32-bit ASNs visible in the Routing Table: 1633 Number of APNIC addresses announced to Internet: 753578752 Equivalent to 44 /8s, 234 /16s and 179 /24s Percentage of available APNIC address space announced: 88.1 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 131072-135580 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, 150/8, 153/8, 163/8, 171/8, 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: 179951 Total ARIN prefixes after maximum aggregation: 88237 ARIN Deaggregation factor: 2.04 Prefixes being announced from the ARIN address blocks: 183020 Unique aggregates announced from the ARIN address blocks: 86528 ARIN Region origin ASes present in the Internet Routing Table: 16573 ARIN Prefixes per ASN: 11.04 ARIN Region origin ASes announcing only one prefix: 6042 ARIN Region transit ASes present in the Internet Routing Table: 1748 Average ARIN Region AS path length visible: 3.9 Max ARIN Region AS path length visible: 27 Number of ARIN region 32-bit ASNs visible in the Routing Table: 725 Number of ARIN addresses announced to Internet: 1118647488 Equivalent to 66 /8s, 173 /16s and 52 /24s Percentage of available ARIN address space announced: 59.2 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, 62464-63487, 64198-64296, 393216-395164 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, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 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: 136089 Total RIPE prefixes after maximum aggregation: 67822 RIPE Deaggregation factor: 2.01 Prefixes being announced from the RIPE address blocks: 143174 Unique aggregates announced from the RIPE address blocks: 88840 RIPE Region origin ASes present in the Internet Routing Table: 17993 RIPE Prefixes per ASN: 7.96 RIPE Region origin ASes announcing only one prefix: 8038 RIPE Region transit ASes present in the Internet Routing Table: 2987 Average RIPE Region AS path length visible: 4.9 Max RIPE Region AS path length visible: 32 Number of RIPE region 32-bit ASNs visible in the Routing Table: 4057 Number of RIPE addresses announced to Internet: 699578624 Equivalent to 41 /8s, 178 /16s and 185 /24s Percentage of available RIPE address space announced: 101.7 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 59392-61439, 61952-62463, 196608-204287 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, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 60645 Total LACNIC prefixes after maximum aggregation: 11659 LACNIC Deaggregation factor: 5.20 Prefixes being announced from the LACNIC address blocks: 72799 Unique aggregates announced from the LACNIC address blocks: 33697 LACNIC Region origin ASes present in the Internet Routing Table: 2469 LACNIC Prefixes per ASN: 29.49 LACNIC Region origin ASes announcing only one prefix: 611 LACNIC Region transit ASes present in the Internet Routing Table: 535 Average LACNIC Region AS path length visible: 4.9 Max LACNIC Region AS path length visible: 28 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 1977 Number of LACNIC addresses announced to Internet: 169465600 Equivalent to 10 /8s, 25 /16s and 215 /24s Percentage of available LACNIC address space announced: 101.0 LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-265628 + ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 12404 Total AfriNIC prefixes after maximum aggregation: 3090 AfriNIC Deaggregation factor: 4.01 Prefixes being announced from the AfriNIC address blocks: 14399 Unique aggregates announced from the AfriNIC address blocks: 5400 AfriNIC Region origin ASes present in the Internet Routing Table: 737 AfriNIC Prefixes per ASN: 19.54 AfriNIC Region origin ASes announcing only one prefix: 193 AfriNIC Region transit ASes present in the Internet Routing Table: 171 Average AfriNIC Region AS path length visible: 4.6 Max AfriNIC Region AS path length visible: 27 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 152 Number of AfriNIC addresses announced to Internet: 69958400 Equivalent to 4 /8s, 43 /16s and 123 /24s Percentage of available AfriNIC address space announced: 69.5 AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4538 5590 4192 76 China Education and Research 4766 3013 11134 984 Korea Telecom 7545 2812 339 138 TPG Telecom Limited 17974 2710 908 90 PT Telekomunikasi Indonesia 4755 2048 428 230 TATA Communications formerly 9829 1911 1383 227 National Internet Backbone 9808 1620 8639 18 Guangdong Mobile Communicatio 4812 1574 2099 113 China Telecom (Group) 4808 1523 2258 481 CNCGROUP IP network China169 9583 1502 120 562 Sify Limited 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 22773 3190 2966 144 Cox Communications Inc. 6389 2686 3688 44 BellSouth.net Inc. 3356 2518 10709 496 Level 3 Communications, Inc. 18566 2175 393 264 MegaPath Corporation 20115 1889 1885 395 Charter Communications 6983 1739 866 241 EarthLink, Inc. 30036 1635 331 351 Mediacom Communications Corp 4323 1585 1005 406 tw telecom holdings, inc. 701 1398 11401 674 MCI Communications Services, 22561 1281 365 215 CenturyTel Internet Holdings, 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 39891 2473 129 7 SaudiNet, Saudi Telecom Compa 20940 2148 847 1557 Akamai International B.V. 34984 2041 306 378 TELLCOM ILETISIM HIZMETLERI A 6849 1209 355 21 JSC "Ukrtelecom" 8402 1101 544 15 OJSC "Vimpelcom" 13188 1072 97 76 TOV "Bank-Inform" 31148 1038 46 41 Freenet Ltd. 12479 1016 965 80 France Telecom Espana SA 8551 982 376 52 Bezeq International-Ltd 6830 900 2694 465 Liberty Global Operations B.V 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 3394 542 128 Telmex Colombia S.A. 28573 2109 2167 120 NET Serviços de Comunicação S 8151 1798 3303 490 Uninet S.A. de C.V. 7303 1571 938 238 Telecom Argentina S.A. 6503 1399 437 55 Axtel, S.A.B. de C.V. 6147 1060 374 30 Telefonica del Peru S.A.A. 26615 1020 2325 35 Tim Celular S.A. 7738 997 1882 41 Telemar Norte Leste S.A. 11830 995 364 24 Instituto Costarricense de El 3816 955 437 164 COLOMBIA TELECOMUNICACIONES S 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 992 1470 14 TE-AS 24863 868 409 38 Link Egypt (Link.NET) 36903 521 262 102 Office National des Postes et 36992 439 1229 32 ETISALAT MISR 24835 323 146 12 Vodafone Data 37492 315 191 72 Orange Tunisie 29571 246 21 12 Cote d'Ivoire Telecom 3741 223 853 184 Internet Solutions 36947 198 807 13 Telecom Algeria 15706 172 32 7 Sudatel (Sudan Telecom Co. Lt 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 4538 5590 4192 76 China Education and Research 10620 3394 542 128 Telmex Colombia S.A. 22773 3190 2966 144 Cox Communications Inc. 4766 3013 11134 984 Korea Telecom 7545 2812 339 138 TPG Telecom Limited 17974 2710 908 90 PT Telekomunikasi Indonesia 6389 2686 3688 44 BellSouth.net Inc. 3356 2518 10709 496 Level 3 Communications, Inc. 39891 2473 129 7 SaudiNet, Saudi Telecom Compa 18566 2175 393 264 MegaPath Corporation Complete listing at http://thyme.rand.apnic.net/current/data-ASnet Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 10620 3394 3266 Telmex Colombia S.A. 22773 3190 3046 Cox Communications Inc. 7545 2812 2674 TPG Telecom Limited 6389 2686 2642 BellSouth.net Inc. 17974 2710 2620 PT Telekomunikasi Indonesia 39891 2473 2466 SaudiNet, Saudi Telecom Compa 4766 3013 2029 Korea Telecom 3356 2518 2022 Level 3 Communications, Inc. 28573 2109 1989 NET Serviços de Comunicação S 18566 2175 1911 MegaPath 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 30662 UNALLOCATED 8.2.129.0/24 3356 Level 3 Communicatio 47092 UNALLOCATED 8.8.204.0/24 16410 The Reynolds and Rey 53506 UNALLOCATED 8.17.102.0/23 2828 XO Communications 46467 UNALLOCATED 8.19.192.0/24 46887 Lightower Fiber Netw 18985 UNALLOCATED 8.21.68.0/22 3356 Level 3 Communicatio 46473 UNALLOCATED 8.27.122.0/24 12180 Internap Network Ser 46473 UNALLOCATED 8.27.124.0/24 12180 Internap Network Ser 27205 UNALLOCATED 8.38.16.0/21 6461 Abovenet Communicati 15347 UNALLOCATED 8.224.147.0/24 12064 Cox Communications I 33628 UNALLOCATED 12.0.239.0/24 1239 Sprint Complete listing at http://thyme.rand.apnic.net/current/data-badAS Prefixes from private and non-routed address space (Global) ----------------------------------------------------------- Prefix Origin AS Description 100.100.1.0/24 9730 Bharti Telesonic Ltd Complete listing at http://thyme.rand.apnic.net/current/data-dsua Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 23.226.112.0/20 62788 >>UNKNOWN<< 23.249.144.0/20 40430 colo4jax, LLC 23.249.144.0/21 40430 colo4jax, LLC 23.249.152.0/21 40430 colo4jax, LLC 27.50.8.0/24 55548 >>UNKNOWN<< 27.50.9.0/24 55548 >>UNKNOWN<< 27.50.10.0/24 55548 >>UNKNOWN<< 27.50.11.0/24 55548 >>UNKNOWN<< 27.100.7.0/24 56096 >>UNKNOWN<< 31.217.248.0/21 44902 COVAGE NETWORKS SASU 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 /8:18 /9:13 /10:36 /11:95 /12:262 /13:505 /14:1006 /15:1747 /16:12907 /17:7404 /18:12608 /19:26219 /20:37339 /21:39581 /22:62162 /23:54208 /24:305941 /25:1007 /26:1065 /27:626 /28:15 /29:14 /30:9 /31:0 /32:21 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 39891 2432 2473 SaudiNet, Saudi Telecom Compa 22773 2398 3190 Cox Communications Inc. 18566 2081 2175 MegaPath Corporation 6389 1607 2686 BellSouth.net Inc. 30036 1454 1635 Mediacom Communications Corp 6983 1386 1739 EarthLink, Inc. 34984 1361 2041 TELLCOM ILETISIM HIZMETLERI A 10620 1260 3394 Telmex Colombia S.A. 11492 1127 1209 CABLE ONE, INC. 6849 992 1209 JSC "Ukrtelecom" Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1589 2:692 4:97 5:1896 6:25 8:1403 12:1808 13:17 14:1434 15:16 16:2 17:50 18:22 20:51 23:1264 24:1738 27:2065 31:1628 32:52 33:2 34:2 35:4 36:161 37:2037 38:1075 39:15 40:72 41:2832 42:340 43:1550 44:32 45:1306 46:2347 47:57 49:1004 50:804 52:23 54:94 55:5 56:6 57:43 58:1417 59:776 60:457 61:1782 62:1428 63:1903 64:4383 65:2236 66:3998 67:2073 68:1076 69:3269 70:1037 71:454 72:1982 74:2551 75:364 76:395 77:1372 78:1227 79:808 80:1354 81:1360 82:888 83:670 84:777 85:1399 86:448 87:1029 88:535 89:1930 90:151 91:6000 92:847 93:2282 94:2128 95:2162 96:461 97:349 98:957 99:56 100:75 101:846 103:8403 104:2013 105:78 106:350 107:1055 108:629 109:2145 110:1218 111:1471 112:836 113:1123 114:868 115:1375 116:1513 117:1110 118:1929 119:1492 120:472 121:1149 122:2182 123:1853 124:1545 125:1672 128:703 129:342 130:432 131:1250 132:539 133:162 134:430 135:106 136:349 137:296 138:1365 139:174 140:248 141:438 142:654 143:557 144:571 145:127 146:764 147:607 148:1259 149:430 150:597 151:783 152:567 153:264 154:505 155:892 156:421 157:424 158:347 159:1050 160:429 161:686 162:2132 163:472 164:691 165:859 166:301 167:878 168:1243 169:192 170:1497 171:251 172:283 173:1533 174:715 175:711 176:1459 177:4014 178:2194 179:1018 180:1944 181:1573 182:1815 183:636 184:748 185:4375 186:2876 187:1837 188:2104 189:1669 190:7584 191:1175 192:8593 193:5663 194:4279 195:3670 196:1964 197:1111 198:5516 199:5507 200:6641 201:3218 202:9718 203:9162 204:4551 205:2703 206:3042 207:2979 208:4005 209:3898 210:3724 211:2044 212:2568 213:2248 214:851 215:72 216:5737 217:1818 218:804 219:533 220:1565 221:822 222:724 223:831 End of report

1 0

Wrong use of 100.64.0.0/10
by Marco Paesani 02 Oct '15

02 Oct '15

Hi, probably this route is wrong, see RFC 6598, as you can see: show route 100.64.0.0/10 inet.0: 563509 destinations, 1528595 routes (561239 active, 0 holddown, 3898 hidden) + = Active Route, - = Last Active, * = Both 100.100.1.0/24 *[BGP/170] 2d 14:46:05, MED 100, localpref 100 AS path: 5580 9498 9730 I, validation-state: unverified > to 78.152.54.166 via ge-2/0/0.0 Do you have some idea ? Ciao, -- Marco Paesani MPAE Srl Skype: mpaesani Mobile: +39 348 6019349 Success depends on the right choice ! Email: marco(a)paesani.it

3 4

gmail admins?
by William Herrin 01 Oct '15

01 Oct '15

Howdy, Any gmail admins out there? I forward email addressed to me to a gmail account. Overnight you started returning: ----- Transcript of session follows ----- ... while talking to gmail-smtp-in.l.google.com.: >>> DATA <<< 550 5.7.1 [IR] Our system has detected an excessively high number of invalid recipients originating from your account. Contact your service provider for sup port 554 5.0.0 Service unavailable There were not temporary failures, you jumped straight to permanent failures. Emails were about 90% to my own gmail account, a total of about 80 over 12 hours. Fix your damn algorithm. And of course I have to complain publicly because you don't accept trouble reports privately, instead sending people into useless dead-end automated help systems. Thanks, Bill Herrin -- William Herrin ................ herrin(a)dirtside.com bill(a)herrin.us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>

3 2

Extra Fairmont Room
by Brandon Ross 01 Oct '15

01 Oct '15

I have one extra room at the Fairmont under the NANOG room block rate of CA$199/night. If you want it before I cancel it, let me know. First come, first served. -- Brandon Ross Yahoo & AIM: BrandonNRoss +1-404-635-6667 ICQ: 2269442 Skype: brandonross Schedule a meeting: http://www.doodle.com/bross

1 1

Routes leaked by AS393742 via AS16397
by Marco Paesani 01 Oct '15

01 Oct '15

Hi, anyboody know this AS ?? Upstream AS3549 Thanks ! Regards -- Marco Paesani MPAE Srl Skype: mpaesani Mobile: +39 348 6019349 Success depends on the right choice ! Email: marco(a)paesani.it

4 5

wanted: tool for traffic generation / characteristics / monitoring
by Matthias Flittner 01 Oct '15

01 Oct '15

Dear colleagues, Currently we are looking for a magic tool with which it is possible to generate specific (realistic) traffic patterns between client and server to analyze (monitor) traffic characteristics (jitter, delay, inter arrival times, etc.). It would be good if that wanted tool is not only able to generate different traffic patterns but also is able to collect different traffic metrics over time. So that it is possible to create catchy plots. :) Any hints or links would be greatly appreciated. Thanks in advance. Best regards, -FliTTi

10 9

Re: Question re session hijacking in dual stack environments w/MacOS
by Dovid Bender 01 Oct '15

01 Oct '15

Have a look at JuiceSSH. ------Original Message------ From: Mark Tinka Sender: NANOG To: David Hubbard To: nanog(a)nanog.org Subject: Re: Question re session hijacking in dual stack environments w/MacOS Sent: Sep 29, 2015 03:23 On 26/Sep/15 16:34, David Hubbard wrote: > > Has anyone run into this? Our users on other platforms don't seem to > have this issue; linux and MS desktops seem to just use v6 if it's > available and v4 if not. I have been tracking down an issue for months where SSH'ing to some devices (which picks IPv6 by default) from my Mac while in the office drops the connection, forcing me to reconnect. It's random; sometimes it happens a lot, sometimes, rarely, other times not at all. I've sort of suspected OS X to be the issue (10.10.5) here. The workaround has been to SSH strictly on IPv4 which is always stable. So it seems to be an issue when the session is carried over IPv6. This only affects OS X. SSH'ing from FreeBSD, for example, on IPv6 is stable. To be honest, I've been a little busy to look deeper into this, but it definitely has something to do with what you describe, I imagine. Mark. Regards, Dovid

1 0