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Weekly Routing Table Report
by Routing Analysis Role Account 06 Nov '09

06 Nov '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 07 Nov, 2009 Report Website: http://thyme.apnic.net Detailed Analysis: http://thyme.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 301614 Prefixes after maximum aggregation: 141503 Deaggregation factor: 2.13 Unique aggregates announced to Internet: 149533 Total ASes present in the Internet Routing Table: 32604 Prefixes per ASN: 9.25 Origin-only ASes present in the Internet Routing Table: 28347 Origin ASes announcing only one prefix: 13795 Transit ASes present in the Internet Routing Table: 4257 Transit-only ASes present in the Internet Routing Table: 102 Average AS path length visible in the Internet Routing Table: 3.6 Max AS path length visible: 30 Max AS path prepend of ASN (12026) 22 Prefixes from unregistered ASNs in the Routing Table: 620 Unregistered ASNs in the Routing Table: 126 Number of 32-bit ASNs allocated by the RIRs: 312 Prefixes from 32-bit ASNs in the Routing Table: 256 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 202 Number of addresses announced to Internet: 2132041952 Equivalent to 127 /8s, 20 /16s and 96 /24s Percentage of available address space announced: 57.5 Percentage of allocated address space announced: 65.2 Percentage of available address space allocated: 88.2 Percentage of address space in use by end-sites: 79.8 Total number of prefixes smaller than registry allocations: 144805 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 72077 Total APNIC prefixes after maximum aggregation: 25252 APNIC Deaggregation factor: 2.85 Prefixes being announced from the APNIC address blocks: 68602 Unique aggregates announced from the APNIC address blocks: 30421 APNIC Region origin ASes present in the Internet Routing Table: 3847 APNIC Prefixes per ASN: 17.83 APNIC Region origin ASes announcing only one prefix: 1043 APNIC Region transit ASes present in the Internet Routing Table: 587 Average APNIC Region AS path length visible: 3.6 Max APNIC Region AS path length visible: 14 Number of APNIC addresses announced to Internet: 470541600 Equivalent to 28 /8s, 11 /16s and 229 /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, 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: 127441 Total ARIN prefixes after maximum aggregation: 67221 ARIN Deaggregation factor: 1.90 Prefixes being announced from the ARIN address blocks: 101848 Unique aggregates announced from the ARIN address blocks: 38884 ARIN Region origin ASes present in the Internet Routing Table: 13330 ARIN Prefixes per ASN: 7.64 ARIN Region origin ASes announcing only one prefix: 5159 ARIN Region transit ASes present in the Internet Routing Table: 1314 Average ARIN Region AS path length visible: 3.3 Max ARIN Region AS path length visible: 24 Number of ARIN addresses announced to Internet: 714201088 Equivalent to 42 /8s, 145 /16s and 216 /24s Percentage of available ARIN address space announced: 62.6 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: 69537 Total RIPE prefixes after maximum aggregation: 40772 RIPE Deaggregation factor: 1.71 Prefixes being announced from the RIPE address blocks: 62836 Unique aggregates announced from the RIPE address blocks: 42111 RIPE Region origin ASes present in the Internet Routing Table: 13706 RIPE Prefixes per ASN: 4.58 RIPE Region origin ASes announcing only one prefix: 7114 RIPE Region transit ASes present in the Internet Routing Table: 2051 Average RIPE Region AS path length visible: 3.9 Max RIPE Region AS path length visible: 20 Number of RIPE addresses announced to Internet: 403252160 Equivalent to 24 /8s, 9 /16s and 35 /24s Percentage of available RIPE address space announced: 75.1 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 2/8, 25/8, 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, 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: 26058 Total LACNIC prefixes after maximum aggregation: 6385 LACNIC Deaggregation factor: 4.08 Prefixes being announced from the LACNIC address blocks: 24373 Unique aggregates announced from the LACNIC address blocks: 13436 LACNIC Region origin ASes present in the Internet Routing Table: 1202 LACNIC Prefixes per ASN: 20.28 LACNIC Region origin ASes announcing only one prefix: 382 LACNIC Region transit ASes present in the Internet Routing Table: 200 Average LACNIC Region AS path length visible: 4.1 Max LACNIC Region AS path length visible: 30 Number of LACNIC addresses announced to Internet: 68123136 Equivalent to 4 /8s, 15 /16s and 122 /24s Percentage of available LACNIC address space announced: 67.7 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: 6017 Total AfriNIC prefixes after maximum aggregation: 1577 AfriNIC Deaggregation factor: 3.82 Prefixes being announced from the AfriNIC address blocks: 4374 Unique aggregates announced from the AfriNIC address blocks: 1588 AfriNIC Region origin ASes present in the Internet Routing Table: 330 AfriNIC Prefixes per ASN: 13.25 AfriNIC Region origin ASes announcing only one prefix: 97 AfriNIC Region transit ASes present in the Internet Routing Table: 66 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 16 Number of AfriNIC addresses announced to Internet: 12886016 Equivalent to 0 /8s, 196 /16s and 160 /24s Percentage of available AfriNIC address space announced: 38.4 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 1771 7505 456 Korea Telecom (KIX) 17488 1360 140 125 Hathway IP Over Cable Interne 4755 1271 293 147 TATA Communications formerly 9583 1096 86 530 Sify Limited 4134 1010 19185 393 CHINANET-BACKBONE 18101 975 204 33 Reliance Infocom Ltd Internet 7545 901 198 99 TPG Internet Pty Ltd 9829 852 664 24 BSNL National Internet Backbo 17974 822 252 104 PT TELEKOMUNIKASI INDONESIA 24560 793 291 171 Bharti Airtel Ltd., Telemedia 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 4262 3883 313 bellsouth.net, inc. 4323 3723 1054 399 Time Warner Telecom 1785 1785 715 140 PaeTec Communications, Inc. 7018 1572 5837 1042 AT&T WorldNet Services 20115 1486 1481 669 Charter Communications 6478 1321 270 433 AT&T Worldnet Services 2386 1304 638 942 AT&T Data Communications Serv 3356 1219 10964 440 Level 3 Communications, LLC 11492 1137 206 13 Cable One 22773 1101 2600 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 515 98 209 Evolva Telecom 3292 448 1906 393 TDC Tele Danmark 702 415 1822 334 UUNET - Commercial IP service 9198 397 138 12 Kazakhtelecom Data Network Ad 35805 384 40 5 United Telecom of Georgia 8866 364 110 23 Bulgarian Telecommunication C 3320 354 7067 302 Deutsche Telekom AG 3215 349 3144 111 France Telecom Transpac 3301 348 1412 305 TeliaNet Sweden 9121 319 1698 26 TTnet Autonomous System 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 1556 2898 236 UniNet S.A. de C.V. 10620 1032 228 102 TVCABLE BOGOTA 28573 797 661 90 NET Servicos de Comunicao S.A 7303 661 349 97 Telecom Argentina Stet-France 22047 546 302 14 VTR PUNTO NET S.A. 11830 475 310 61 Instituto Costarricense de El 11172 444 99 70 Servicios Alestra S.A de C.V 14117 437 29 11 Telefonica del Sur S.A. 7738 430 858 29 Telecomunicacoes da Bahia S.A 6471 422 96 31 ENTEL CHILE S.A. 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 949 188 7 TEDATA 24863 940 98 71 LINKdotNET AS number 3741 274 857 234 The Internet Solution 2018 194 188 117 Tertiary Education Network 6713 176 167 12 Itissalat Al-MAGHRIB 29571 145 15 8 Ci Telecom Autonomous system 33776 124 7 11 Starcomms Nigeria Limited 5536 122 8 13 Internet Egypt Network 5713 116 508 67 Telkom SA Ltd 20858 109 34 6 EgyNet 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 4262 3883 313 bellsouth.net, inc. 4323 3723 1054 399 Time Warner Telecom 1785 1785 715 140 PaeTec Communications, Inc. 4766 1771 7505 456 Korea Telecom (KIX) 7018 1572 5837 1042 AT&T WorldNet Services 8151 1556 2898 236 UniNet S.A. de C.V. 20115 1486 1481 669 Charter Communications 17488 1360 140 125 Hathway IP Over Cable Interne 6478 1321 270 433 AT&T Worldnet Services 2386 1304 638 942 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 4323 3723 3324 Time Warner Telecom 1785 1785 1645 PaeTec Communications, Inc. 8151 1556 1320 UniNet S.A. de C.V. 4766 1771 1315 Korea Telecom (KIX) 17488 1360 1235 Hathway IP Over Cable Interne 4755 1271 1124 TATA Communications formerly 11492 1137 1124 Cable One 18566 1062 1052 Covad Communications 22773 1101 1035 Cox Communications, Inc. 18101 975 942 Reliance Infocom Ltd Internet 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 2.0.0.0/16 12654 RIPE NCC RIS Project 2.1.0.0/21 12654 RIPE NCC RIS Project 2.1.24.0/24 12654 RIPE NCC RIS Project 41.64.0.0/15 15475 Nile Online 41.223.92.0/22 36936 >>UNKNOWN<< 41.223.188.0/24 22351 Intelsat 41.223.189.0/24 26452 Local Communications Networks 46.0.0.0/16 12654 RIPE NCC RIS Project 46.1.0.0/21 12654 RIPE NCC RIS Project 46.1.24.0/24 12654 RIPE NCC RIS Project 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 /8:20 /9:10 /10:25 /11:65 /12:177 /13:360 /14:639 /15:1217 /16:10738 /17:4943 /18:8503 /19:17557 /20:21191 /21:21157 /22:27429 /23:27278 /24:157443 /25:945 /26:1125 /27:563 /28:203 /29:10 /30:8 /31:0 /32:8 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 6389 2788 4262 bellsouth.net, inc. 4323 2351 3723 Time Warner Telecom 4766 1436 1771 Korea Telecom (KIX) 1785 1249 1785 PaeTec Communications, Inc. 17488 1136 1360 Hathway IP Over Cable Interne 11492 1061 1137 Cable One 18566 1043 1062 Covad Communications 9583 948 1096 Sify Limited 7018 944 1572 AT&T WorldNet Services 10620 937 1032 TVCABLE BOGOTA Complete listing at http://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 2:1 4:14 8:232 12:2137 13:7 15:22 16:3 17:5 20:36 24:1242 32:49 34:2 38:609 40:99 41:1737 43:1 44:2 46:1 47:21 52:6 55:2 56:2 57:23 58:622 59:611 60:443 61:987 62:966 63:1998 64:3669 65:2367 66:4088 67:1769 68:991 69:2781 70:590 71:153 72:1730 73:2 74:1981 75:184 76:362 77:859 78:581 79:376 80:939 81:818 82:480 83:440 84:542 85:1011 86:375 87:695 88:425 89:1499 90:52 91:2635 92:420 93:1180 94:1269 95:810 96:191 97:273 98:386 99:30 109:114 110:267 111:454 112:145 113:162 114:282 115:420 116:1005 117:589 118:346 119:786 120:127 121:702 122:1301 123:782 124:1054 125:1347 128:221 129:218 130:130 131:426 132:76 133:16 134:186 135:43 136:232 137:167 138:179 139:83 140:439 141:122 142:391 143:348 144:360 145:50 146:393 147:170 148:553 149:200 150:150 151:172 152:212 153:159 154:2 155:273 156:168 157:308 158:93 159:358 160:293 161:173 162:279 163:157 164:278 165:466 166:487 167:392 168:750 169:162 170:552 171:42 172:1 173:387 174:390 175:1 178:1 180:166 182:1 184:1 186:157 187:187 188:1259 189:622 190:3188 192:5746 193:4269 194:3321 195:2756 196:1167 198:3567 199:3356 200:5182 201:1351 202:7883 203:8231 204:3929 205:2144 206:2403 207:2998 208:3980 209:3428 210:2541 211:1145 212:1646 213:1629 214:164 215:39 216:4427 217:1335 218:471 219:436 220:1138 221:452 222:303 End of report

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Re: Email filtering and protection Help
by Gregory Hicks 05 Nov '09

05 Nov '09

> From: Mark Urbach <mark.urbach(a)pnpt.com> > To: <nanog(a)nanog.org> > Subject: Email filtering and protection Help > Date: Thu, 5 Nov 2009 12:02:43 -0600 > > Today we use Postini for inbound email protection. > Today we use Symantec's SMTP Gateway (running on Solaris) for outgoing email > filtering. (helps stop bad stuff from our customers sending email to the > Internet) This SMTP Gateway software is "End of Life" > > Does anyone have recommendations for other products/software to filter our > outgoing email, from our customers going to the internet. Postini also does outgoing email filtering. Just requires setup. Regards, Gregory Hicks > > > Thanks, > Mark Urbach > PinPoint Communications, Inc. > 100 N. 12th St Suite 500 > Lincoln, NE 68508 > 402-438-6211 ext 1923 Office > 402-660-7982 Cell > mark.urbach(a)pnpt.com > --------------------------------------------------------------------- Gregory Hicks | Principal Systems Engineer | Direct: 408.569.7928 People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf -- George Orwell The price of freedom is eternal vigilance. -- Thomas Jefferson "The best we can hope for concerning the people at large is that they be properly armed." --Alexander Hamilton

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RE: Email filtering and protection Help
by Jason Gurtz 05 Nov '09

05 Nov '09

> Does anyone have recommendations for other products/software to filter > our outgoing email, from our customers going to the internet. For Roll-your-own it's hard to beat a combo of MIMEDefang/SA/Clam (MD is a milter, so sendmail or postfix needed). The MIMEDefang developer also started a company which sells CanIT Pro, an appliance version of the above with additional features/web interface/support Ironport (reassuringly expensive) has worked great here at work. ~JasonG

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Re: Email filtering and protection Help
by Phil Regnauld 05 Nov '09

05 Nov '09

Mark Urbach (mark.urbach) writes: > Today we use Postini for inbound email protection. > Today we use Symantec's SMTP Gateway (running on Solaris) for outgoing email > filtering. (helps stop bad stuff from our customers sending email to the > Internet) This SMTP Gateway software is "End of Life" > > Does anyone have recommendations for other products/software to filter our > outgoing email, from our customers going to the internet. Are we talking virus protection ? You might want to look at something like amavisd-new or clamav in SMTP proxy mode. http://www.ijs.si/software/amavisd/ http://www.clamav.net/ Amavisd-new together with clamav and SpamAssassin will block a big chunk aof spam and viruses. Some vendors like Barracuda and IronPort do this as well, if you're willing to pay. Cheers, Phil

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Re: AT&T flapped in Washington?
by Ali S 05 Nov '09

05 Nov '09

Washington state or DC ? sent via droid... On Nov 5, 2009 8:25 AM, "Leland Vandervort" <leland(a)taranta.discpro.org> wrote: Hi all, Anyone have any information on the 20 minute (or so) flap that appears to have occured in Washington between AT&T and the rest of the world? We saw a complete outage of connectivity to several APIs at a few parnters who happen to all be behind AT&T. Although in BGP the routes were still being advertised across this peering from AT&T to the world, traffic just died at the washington peering with AT&T irrespective of which path we took. (3 different transits here). Just curious. Thanks, Leland

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AT&T flapped in Washington?
by Leland Vandervort 05 Nov '09

05 Nov '09

Hi all, Anyone have any information on the 20 minute (or so) flap that appears to have occured in Washington between AT&T and the rest of the world? We saw a complete outage of connectivity to several APIs at a few parnters who happen to all be behind AT&T. Although in BGP the routes were still being advertised across this peering from AT&T to the world, traffic just died at the washington peering with AT&T irrespective of which path we took. (3 different transits here). Just curious. Thanks, Leland

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SIP trunk silliness after peering change
by Adam Greene 05 Nov '09

05 Nov '09

Hi, Does this make any sense? We (ASN 11579) peer to (2) WBS routers (ASN 19080). We lost our link to the primary WBS router. After that, calls coming in over our Bandwidth.com SIP trunks were fine in one direction only. Callers could hear us, but we couldn't hear them. After 45 minutes, things righted themselves. Later on the primary WBS link came back up and went down again 5 minutes later (not WBS's fault, we brought up and took down the BGP session). Again we experienced the one-direction-only problem with Bandwidth.com, but this time it lasted 2.50 hours. Again things eventually righted themselves without our intervention. Traces from us to Bandwidth.com were fine during the outage. We were unable to get a trace from Bandwidth.com to us during the outage. Maybe the only way to figure out what is going on is to get that return path trace during an outage. Has anyone else experienced issues of this nature (extended outage of voice in one direction only) specifically with Bandwidth.com SIP trunks as a result of simply changing one's peering with one's upstream provider? Thanks, Adam

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HE.net, Fremont-2 outage?
by Tico 04 Nov '09

04 Nov '09

Hey guys, I can't get through to Hurricane Electric, and they seem to be having an outage at their Fremont-2 facility again (as of 17:30 UTC or thereabouts) -- ticket system is unanswered, phones go to voicemail, all equipment is unreachable. Does anyone here have a presence at 48233 Warm Springs Blvd, that can provide any information about this? I got hit by the ATS failure last month, so I guess it's possible that that equipment may have flaked again. -t

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Anyone having complaints about connectivity from people in asia?
by Drew Weaver 04 Nov '09

04 Nov '09

Packet loss, latency, etc? We have 6 connections and there doesn't seem to be any real theme between source/dest IPs except everyone complaining appears to be in Asia (pakistan, etc). -Drew

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ip options
by Luca Tosolini 04 Nov '09

04 Nov '09

Experts, out of the well-known values for ip options: X@r4# set ip-options ? Possible completions: <range> Range of values [ Open a set of values any Any IP option loose-source-route Loose source route route-record Route record router-alert Router alert security Security stream-id Stream ID strict-source-route Strict source route timestamp Timestamp I can only think of: - RSVP using router-alert - ICMP using route-record, timestamp But I can not think of any other use of any other IP option. Considering the security hazard that they imply, I am therefore thinking to drop them. Is any other ip options used by: ospf, isis, bgp, ldp, igmp, pim, bfd? Thanks, Luca.

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