bgp/finding advertised nets of an AS-Number

Aug 19, 2005 1 Replies
T

Hi,



i'm looking for a way to extract all known (advertised) subnets of an ASN, like cidr-report shows it at the bottom of their scripts at

formatting link
(1 advertised subnet) or
formatting link
(many advertised subnets).



Is there a way to get this information, a list of advertised subnets of a specific asn, out of a public source like the route-server at route-views.oregon-ix.net??



Or can this information only derived out of analyzing a complete routing-table?



Sorry if this is a dumb question - I'm not a routing-geek at all and i usually leave "enable" to somebody who knows what he's doing.



Thomas Springer


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A

On 19.08.2005 21:34 snipped-for-privacy@gmail.com wrote

Try

show bgp ipv4 unicast regexp _$

or on older systems simply

show ip bgp regexp _$

Example:

route-views.oregon-ix.net>show ip bgp regexp _6695$ BGP table version is 6869496, local router ID is 198.32.162.100 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, S Stale Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path

  • 80.81.192.0/20 157.130.10.233 0 701 1239
12480 6695 i
  • 217.75.96.60 0 0 16150 15703
13101 6695 i
  • 129.250.0.85 10 0 2914 174
12399 6695 i
  • 134.222.85.45 0 286 12480
6695 i
  • 203.181.248.233 0 7660 2516
3320 12399 6695 i
  • 202.249.2.86 0 7500 2497
3320 12399 6695 i
  • 167.142.3.6 0 5056 1239
12480 6695 i
  • 207.246.129.14 0 11608 174
12399 6695 i
  • 209.123.12.51 0 8001 3257
25560 6695 i
  • 196.7.106.245 0 0 2905 6453
25560 6695 i
  • 207.172.6.227 22 0 6079 174
12399 6695 i
  • 144.228.241.81 4294967294 0 1239 12480
6695 i
  • 195.219.96.239 0 6453 25560
6695 i
  • 203.62.252.26 0 1221 4637
3320 12399 6695 i
  • 66.185.128.48 504 0 1668 3356
12399 6695 i
  • 4.68.0.243 0 0 3356 12399
6695 i
  • 194.85.4.55 0 3277 3267
3343 1299 6695 i
  • 216.218.252.145 0 6939 13101
6695 i
  • 213.140.32.146 0 12956 6695 i
  • 65.106.7.139 3 0 2828 6453
25560 6695 i
  • 216.140.2.59 20 0 6395 3356
12399 6695 i
  • 134.55.200.1 0 293 174
12399 6695 i
  • 207.45.223.244 0 6453 25560
6695 i
  • 129.250.0.11 1 0 2914 174
12399 6695 i
  • 208.186.154.36 0 0 5650 3356
12399 6695 i
  • 208.51.134.254 11354 0 3549 12399
6695 i
  • 207.46.32.32 0 8075 13101
6695 i
  • 209.10.12.156 45107 0 4513 6695 i
  • 207.172.6.162 6 0 6079 174
12399 6695 i
  • 64.125.0.137 8060 0 6461 13101
6695 i
  • 213.248.83.252 0 1299 6695 i
  • 208.186.154.35 0 0 5650 174
12399 6695 i
  • 206.24.210.26 0 3561 1273
12399 6695 i Network Next Hop Metric LocPrf Weight Path
  • 193.251.245.6 0 5511 25560
6695 i
  • 202.232.0.2 0 2497 3320
12399 6695 i
  • 209.10.12.125 36505 0 4513 6695 i
  • 209.10.12.28 28404 0 4513 6695 i
  • 213.200.87.254 10 0 3257 25560
6695 i
  • 12.0.1.63 0 7018 3356
12399 6695 i
  • 206.186.255.223 0 2493 3602
174 12399 6695 i
  • 195.66.232.239 0 5459 12399
6695 i
  • 195.66.224.82 0 4513 6695 i
*> 164.128.32.11 0 3303 6695 i
  • 216.18.63.137 0 6539 174
12399 6695 i
  • 207.246.129.6 0 11608 174
12399 6695 i
  • 216.140.8.59 20 0 6395 3356
12399 6695 i
  • 209.161.175.4 0 14608 19029
13237 6695 i
  • 83.88.48.13 0 3292 13101
6695 i
  • 193.0.0.56 0 3333 13101
6695 i

Arnold

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