Internet Routing Table Analysis Update. Philip Smith MENOG 5, Beirut, 29th October 2009
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1 Internet Routing Table Analysis Update Philip Smith MENOG 5, Beirut, 29th October 2009
2 Motivation 1998: No one was publishing any Internet routing table analysis Only CIDR-Report reporting on top 20 contributors to routing table, and top 20 bad aggregators With support of APNIC, my weekly reporting report started 23rd February 1999: Routing table size CIDR-Report style reporting on a per-rir basis and many other interesting features
3 Routing Report 28 October 2009 BGP routing table entries examined: Prefixes after maximum aggregation: Deaggregation factor: 2.14 Unique aggregates announced to Internet: Total ASes present in the Internet Routing Table: Prefixes per ASN: 9.27 Origin-only ASes present in the Internet Routing Table: Origin ASes announcing only one prefix: Transit ASes present in the Internet Routing Table: 4280 Transit-only ASes present in the Internet Routing Table: 103 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: 602 Unregistered ASNs in the Routing Table: 126 Number of 32-bit ASNs allocated by the RIRs: 301 Prefixes from 32-bit ASNs in the Routing Table: 242 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 191 Number of addresses announced to Internet: Equivalent to 126 /8s, 122 /16s and 210 /24s Percentage of available address space announced: 57.3 Percentage of allocated address space announced: 64.9 Percentage of available address space allocated: 88.2 Percentage of address space in use by end-sites: 79.5 Total number of prefixes smaller than registry allocations:
4 APNIC Region Prefixes being announced by APNIC Region ASes: Total APNIC prefixes after maximum aggregation: APNIC Deaggregation factor: 2.86 Prefixes being announced from the APNIC address blocks: Unique aggregates announced from the APNIC address blocks: APNIC Region origin ASes present in the Internet Routing Table: 3846 APNIC Prefixes per ASN: APNIC Region origin ASes announcing only one prefix: 1042 APNIC Region transit ASes present in the Internet Routing Table: 592 Average APNIC Region AS path length visible: 3.6 Max APNIC Region AS path length visible: 14 Number of APNIC addresses announced to Internet: Equivalent to 27 /8s, 216 /16s and 6 /24s Percentage of available APNIC address space announced: 79.6 APNIC AS Blocks , , , (pre-erx allocations) , , , APNIC Address Blocks 43/8, 58/8 to 61/8, 110/8 to 126/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8 to 222/8
5 ARIN Region Prefixes being announced by ARIN Region ASes: Total ARIN prefixes after maximum aggregation: ARIN Deaggregation factor: 1.90 Prefixes being announced from the ARIN address blocks: Unique aggregates announced from the ARIN address blocks: ARIN Region origin ASes present in the Internet Routing Table: ARIN Prefixes per ASN: 7.64 ARIN Region origin ASes announcing only one prefix: 5137 ARIN Region transit ASes present in the Internet Routing Table: 1313 Average ARIN Region AS path length visible: 3.3 Max ARIN Region AS path length visible: 24 Number of ARIN addresses announced to Internet: Equivalent to 42 /8s, 65 /16s and 210 /24s Percentage of available ARIN address space announced: 62.1 ARIN AS Blocks , , , , (pre-erx allocations) , , , , , , , , , , , , , , , , , , , ARIN Address Blocks 3/8, 4/8, 6/8 to 9/8, 11/8 to 13/8, 15/8 to 22/8, 24/8, 26/8, 28/8 to 30/8, 32/8 to 35/8, 38/8 40/8, 44/8, 45/8, 47/8, 48/8, 52/8, 54/8 to 56/8, 63/8 to 76/8, 96/8 to 99/8, 108/8, 173/8, 174/8, 184/8, 199/8, 204/8 to 209/8, 214/8 to 216/8,
6 RIPE NCC Region Prefixes being announced by RIPE Region ASes: Total RIPE prefixes after maximum aggregation: RIPE Deaggregation factor: 1.71 Prefixes being announced from the RIPE address blocks: Unique aggregates announced from the RIPE address blocks: RIPE Region origin ASes present in the Internet Routing Table: RIPE Prefixes per ASN: 4.60 RIPE Region origin ASes announcing only one prefix: 7118 RIPE Region transit ASes present in the Internet Routing Table: 2058 Average RIPE Region AS path length visible: 3.9 Max RIPE Region AS path length visible: 20 Number of RIPE addresses announced to Internet: Equivalent to 24 /8s, 1 /16s and 90 /24s Percentage of available RIPE address space announced: 75.0 RIPE AS Blocks , 2043, 2047, , (pre-erx allocations) , , , , , , , , , , , , RIPE Address Blocks 2/8, 25/8, 46/8, 51/8, 62/8, 77/8 to 95/8, 109/8, 178/8, 193/8 to 195/8, 212/8, 213/8, 217/8
7 LACNIC Region Prefixes being announced by LACNIC Region ASes: Total LACNIC prefixes after maximum aggregation: 6352 LACNIC Deaggregation factor: 4.08 Prefixes being announced from the LACNIC address blocks: Unique aggregates announced from the LACNIC address blocks: LACNIC Region origin ASes present in the Internet Routing Table: 1197 LACNIC Prefixes per ASN: LACNIC Region origin ASes announcing only one prefix: 383 LACNIC Region transit ASes present in the Internet Routing Table: 199 Average LACNIC Region AS path length visible: 4.1 Max LACNIC Region AS path length visible: 30 Number of LACNIC addresses announced to Internet: Equivalent to 4 /8s, 8 /16s and 83 /24s Percentage of available LACNIC address space announced: 67.2 LACNIC AS Blocks , , , plus ERX transfers LACNIC Address Blocks 186/8 to 189/8, 190/8, 200/8, 201/8,
8 AfriNIC Region Prefixes being announced by AfriNIC Region ASes: 6009 Total AfriNIC prefixes after maximum aggregation: 1570 AfriNIC Deaggregation factor: 3.83 Prefixes being announced from the AfriNIC address blocks: 4373 Unique aggregates announced from the AfriNIC address blocks: 1584 AfriNIC Region origin ASes present in the Internet Routing Table: 331 AfriNIC Prefixes per ASN: AfriNIC Region origin ASes announcing only one prefix: 98 AfriNIC Region transit ASes present in the Internet Routing Table: 70 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 15 Number of AfriNIC addresses announced to Internet: Equivalent to 0 /8s, 196 /16s and 138 /24s Percentage of available AfriNIC address space announced: 38.4 AfriNIC AS Blocks , & ERX transfers AfriNIC Address Blocks 41/8, 197/8,
9 Global per AS prefix count summary ASN No of nets /20 equiv Max Agg Description bellsouth.net, inc Time Warner Telecom PaeTec Communications, Inc Korea Telecom (KIX) AT&T WorldNet Services UniNet S.A. de C.V Hathway IP Over Cable Interne Charter Communications AT&T Worldnet Services AT&T Data Communications Serv TATA Communications formerly Level 3 Communications, LLC Cable One Cox Communications, Inc Sify Limited Covad Communications Citizens Utilities Verizon Global Networks TVCABLE BOGOTA CHINANET-BACKBONE
10 Global Aggregation Savings Summary ASN No of Nets Net Savings Description Time Warner Telecom PaeTec Communications, Inc Hathway IP Over Cable Interne Korea Telecom (KIX) UniNet S.A. de C.V Cable One TATA Communications formerly Covad Communications Cox Communications, Inc TEDATA Reliance Infocom Ltd Internet TVCABLE BOGOTA AT&T Worldnet Services LINKdotNET AS number BSNL National Internet Backbo Charter Communications TPG Internet Pty Ltd Verizon Global Networks Level 3 Communications, LLC CenturyTel Internet Holdings,
11 Number of prefixes announced by prefix length /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:20 /9:10 /10:25 /11:63 /12:177 /13:355 /14:631 /15:1213 /16:10701 /17:4897 /18:8473 /19:17524 /20:21119 /21:21115 /22:27398 /23:27044 /24: /25:937 /26:1126 /27:565 /28:158 /29:10 /30:8 /31:0 /32:8 October 2009 October 2008 Number of prefixes announced by prefix length /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:18 /9:9 /10:17 /11:46 /12:148 /13:298 /14:538 /15:1064 /16:10115 /17:4404 /18:7632 /19:16421 /20:19283 /21:18728 /22:23831 /23:24772 /24: /25:819 /26:1002 /27:834 /28:82 /29:9 /30:1 /31:0 /32:7
12 Prefixes Smaller than Registry Allocations ASN No of nets Total ann. Description bellsouth.net, inc Time Warner Telecom Korea Telecom (KIX) Hathway IP Over Cable Interne PaeTec Communications, Inc Cable One Covad Communications Sify Limited AT&T WorldNet Services TVCABLE BOGOTA TEDATA Reliance Infocom Ltd Internet Level 3 Communications, LLC Citizens Utilities Korea Telecom (ATM-MPLS) Bharti Airtel Ltd., Telemedia Cox Communications, Inc Yipes Communications, Inc TATA Communications formerly CenturyTel Internet Holdings
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14 Growth slowed down
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23 Internet Routing Table Analysis Update Questions?
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