The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Wednesday, September 21, 2011

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 22 Sep, 2011

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined: 373025
Prefixes after maximum aggregation: 168109
Deaggregation factor: 2.22
Unique aggregates announced to Internet: 184921
Total ASes present in the Internet Routing Table: 38859
Prefixes per ASN: 9.60
Origin-only ASes present in the Internet Routing Table: 32218
Origin ASes announcing only one prefix: 15493
Transit ASes present in the Internet Routing Table: 5214
Transit-only ASes present in the Internet Routing Table: 136
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: 1368
Unregistered ASNs in the Routing Table: 763
Number of 32-bit ASNs allocated by the RIRs: 1757
Number of 32-bit ASNs visible in the Routing Table: 1427
Prefixes from 32-bit ASNs in the Routing Table: 3271
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 99
Number of addresses announced to Internet: 2479356672
Equivalent to 147 /8s, 199 /16s and 251 /24s
Percentage of available address space announced: 66.9
Percentage of allocated address space announced: 66.9
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 91.4
Total number of prefixes smaller than registry allocations: 155771

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes: 93637
Total APNIC prefixes after maximum aggregation: 30756
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 90176
Unique aggregates announced from the APNIC address blocks: 38138
APNIC Region origin ASes present in the Internet Routing Table: 4574
APNIC Prefixes per ASN: 19.71
APNIC Region origin ASes announcing only one prefix: 1261
APNIC Region transit ASes present in the Internet Routing Table: 707
Average APNIC Region AS path length visible: 4.4
Max APNIC Region AS path length visible: 19
Number of APNIC region 32-bit ASNs visible in the Routing Table: 89
Number of APNIC addresses announced to Internet: 628010592
Equivalent to 37 /8s, 110 /16s and 174 /24s
Percentage of available APNIC address space announced: 79.6

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: 143782
Total ARIN prefixes after maximum aggregation: 73736
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 115892
Unique aggregates announced from the ARIN address blocks: 48005
ARIN Region origin ASes present in the Internet Routing Table: 14672
ARIN Prefixes per ASN: 7.90
ARIN Region origin ASes announcing only one prefix: 5654
ARIN Region transit ASes present in the Internet Routing Table: 1554
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: 12
Number of ARIN addresses announced to Internet: 804897024
Equivalent to 47 /8s, 249 /16s and 193 /24s
Percentage of available ARIN address space announced: 64.0

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: 88821
Total RIPE prefixes after maximum aggregation: 50242
RIPE Deaggregation factor: 1.77
Prefixes being announced from the RIPE address blocks: 81620
Unique aggregates announced from the RIPE address blocks: 53971
RIPE Region origin ASes present in the Internet Routing Table: 15987
RIPE Prefixes per ASN: 5.11
RIPE Region origin ASes announcing only one prefix: 7973
RIPE Region transit ASes present in the Internet Routing Table: 2509
Average RIPE Region AS path length visible: 4.6
Max RIPE Region AS path length visible: 33
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1012
Number of RIPE addresses announced to Internet: 489570176
Equivalent to 29 /8s, 46 /16s and 63 /24s
Percentage of available RIPE address space announced: 78.9

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: 34900
Total LACNIC prefixes after maximum aggregation: 7754
LACNIC Deaggregation factor: 4.50
Prefixes being announced from the LACNIC address blocks: 34194
Unique aggregates announced from the LACNIC address blocks: 17901
LACNIC Region origin ASes present in the Internet Routing Table: 1527
LACNIC Prefixes per ASN: 22.39
LACNIC Region origin ASes announcing only one prefix: 449
LACNIC Region transit ASes present in the Internet Routing Table: 274
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: 310
Number of LACNIC addresses announced to Internet: 89159040
Equivalent to 5 /8s, 80 /16s and 117 /24s
Percentage of available LACNIC address space announced: 59.0

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: 8432
Total AfriNIC prefixes after maximum aggregation: 1997
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 6513
Unique aggregates announced from the AfriNIC address blocks: 1989
AfriNIC Region origin ASes present in the Internet Routing Table: 488
AfriNIC Prefixes per ASN: 13.35
AfriNIC Region origin ASes announcing only one prefix: 156
AfriNIC Region transit ASes present in the Internet Routing Table: 104
Average AfriNIC Region AS path length visible: 4.6
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: 27318272
Equivalent to 1 /8s, 160 /16s and 216 /24s
Percentage of available AfriNIC address space announced: 40.7

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 2505 11048 956 Korea Telecom (KIX)
17974 1991 516 31 PT TELEKOMUNIKASI INDONESIA
7545 1599 303 86 TPG Internet Pty Ltd
4755 1554 639 169 TATA Communications formerly
24560 1182 337 194 Bharti Airtel Ltd., Telemedia
9829 1158 989 28 BSNL National Internet Backbo
9583 1084 80 501 Sify Limited
4808 1071 2096 302 CNCGROUP IP network: China169
7552 1001 1062 11 Vietel Corporation
18101 950 118 139 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 3561 3817 226 bellsouth.net, inc.
18566 1912 364 237 Covad Communications
1785 1825 680 123 PaeTec Communications, Inc.
7029 1704 1008 194 Windstream Communications Inc
4323 1625 1085 393 Time Warner Telecom
20115 1595 1542 634 Charter Communications
22773 1458 2907 99 Cox Communications, Inc.
30036 1426 266 679 Mediacom Communications Corp
19262 1394 4724 398 Verizon Global Networks
7018 1332 7050 869 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 721 352 13 Corbina telecom
34984 565 108 181 BILISIM TELEKOM
20940 542 182 422 Akamai Technologies European
6830 524 1811 322 UPC Distribution Services
3320 493 8167 381 Deutsche Telekom AG
3292 477 2081 408 TDC Tele Danmark
12479 473 594 8 Uni2 Autonomous System
29049 424 31 55 AzerSat LLC.
3301 404 1904 353 TeliaNet Sweden
8551 404 354 44 Bezeq International

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 1679 309 156 TVCABLE BOGOTA
8151 1417 2804 352 UniNet S.A. de C.V.
28573 1358 1013 70 NET Servicos de Comunicao S.A
7303 1156 678 170 Telecom Argentina Stet-France
14420 734 58 88 CORPORACION NACIONAL DE TELEC
6503 581 450 68 AVANTEL, S.A.
22047 580 322 17 VTR PUNTO NET S.A.
27947 568 55 81 Telconet S.A
3816 534 232 98 Empresa Nacional de Telecomun
11172 516 85 91 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
24863 815 147 43 LINKdotNET AS number
8452 708 445 11 TEDATA
15475 450 74 8 Nile Online
36992 293 415 14 Etisalat MISR
3741 274 938 229 The Internet Solution
15706 244 32 6 Sudatel Internet Exchange Aut
6713 242 519 14 Itissalat Al-MAGHRIB
33776 235 12 10 Starcomms Nigeria Limited
12258 198 28 58 Vodacom Internet Company
24835 182 70 11 RAYA Telecom - Egypt

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 3561 3817 226 bellsouth.net, inc.
23456 3271 772 1769 32-bit ASN transition
4766 2505 11048 956 Korea Telecom (KIX)
17974 1991 516 31 PT TELEKOMUNIKASI INDONESIA
18566 1912 364 237 Covad Communications
1785 1825 680 123 PaeTec Communications, Inc.
7029 1704 1008 194 Windstream Communications Inc
10620 1679 309 156 TVCABLE BOGOTA
4323 1625 1085 393 Time Warner Telecom
7545 1599 303 86 TPG Internet Pty Ltd

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
17974 1991 1960 PT TELEKOMUNIKASI INDONESIA
1785 1825 1702 PaeTec Communications, Inc.
18566 1912 1675 Covad Communications
4766 2505 1549 Korea Telecom (KIX)
10620 1679 1523 TVCABLE BOGOTA
7545 1599 1513 TPG Internet Pty Ltd
7029 1704 1510 Windstream Communications Inc
23456 3271 1502 32-bit ASN transition
4755 1554 1385 TATA Communications formerly
22773 1458 1359 Cox Communications, Inc.

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
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 12.39.155.0/24 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.159.0/24 7018 AT&T WorldNet Servic
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

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
24.225.128.0/18 36377 Comcast Telecommunications, I
24.225.192.0/23 36377 Comcast Telecommunications, I
24.225.192.0/18 36377 Comcast Telecommunications, I
24.225.224.0/21 36377 Comcast Telecommunications, I
24.225.237.0/24 36377 Comcast Telecommunications, I
24.225.248.0/21 36377 Comcast Telecommunications, I
41.222.79.0/24 36938 >>UNKNOWN<<
41.223.92.0/22 36936 >>UNKNOWN<<
46.18.104.0/21 23456 32-bit ASN transition
50.115.224.0/20 27257 Webair Internet Development 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 /12:235
/13:464 /14:801 /15:1416 /16:11975 /17:5978 /18:10023
/19:19797 /20:26947 /21:27040 /22:36444 /23:34863 /24:193545
/25:1106 /26:1314 /27:759 /28:170 /29:4 /30:0
/31:0 /32:5

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

ASN No of nets Total ann. Description
6389 2198 3561 bellsouth.net, inc.
18566 1868 1912 Covad Communications
10620 1574 1679 TVCABLE BOGOTA
23456 1563 3271 32-bit ASN transition
7029 1401 1704 Windstream Communications Inc
30036 1383 1426 Mediacom Communications Corp
11492 1113 1151 Cable One
7011 1058 1183 Citizens Utilities
1785 1053 1825 PaeTec Communications, Inc.
22773 947 1458 Cox Communications, Inc.

Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

1:381 2:161 4:15 5:1 6:3 8:352
12:1955 13:1 14:541 15:13 16:3 17:7
20:10 23:35 24:1681 27:939 31:534 32:64
33:4 34:2 36:4 38:742 40:108 41:2533
42:48 44:3 46:980 47:3 49:246 50:422
52:13 54:2 55:6 56:2 57:35 58:877
59:492 60:376 61:1178 62:1083 63:1940 64:4056
65:2304 66:3976 67:1952 68:1114 69:3189 70:803
71:377 72:1859 74:2460 75:349 76:339 77:870
78:742 79:472 80:1127 81:842 82:503 83:467
84:625 85:1086 86:410 87:862 88:351 89:1556
90:266 91:4108 92:532 93:1231 94:1323 95:847
96:437 97:275 98:931 99:37 101:209 103:311
106:96 107:52 108:78 109:1020 110:669 111:792
112:322 113:446 114:564 115:686 116:892 117:690
118:889 119:1191 120:334 121:686 122:1603 123:999
124:1358 125:1349 128:244 129:179 130:165 131:574
132:120 133:21 134:214 135:53 136:212 137:139
138:288 139:108 140:483 141:279 142:389 143:408
144:480 145:60 146:470 147:215 148:639 149:251
150:153 151:190 152:448 153:177 154:6 155:394
156:202 157:354 158:144 159:462 160:325 161:207
162:339 163:178 164:507 165:374 166:534 167:433
168:749 169:146 170:857 171:84 172:1 173:1654
174:646 175:397 176:203 177:273 178:1014 180:1067
181:30 182:625 183:219 184:377 185:1 186:1459
187:670 188:942 189:852 190:5160 192:5912 193:5015
194:3528 195:3062 196:1248 197:168 198:3578 199:4117
200:5519 201:1637 202:8549 203:8494 204:4253 205:2329
206:2674 207:2827 208:4035 209:3466 210:2702 211:1468
212:2084 213:1771 214:785 215:76 216:4878 217:1605
218:552 219:339 220:1199 221:514 222:342 223:266


End of report
_______________________________________________
bgp-stats mailing list
bgp-stats@lists.apnic.net
http://mailman.apnic.net/mailman/listinfo/bgp-stats

No comments:

Post a Comment