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Re: two questions - SWAG answers entertained

  • From: Marshall Eubanks
  • Date: Fri Oct 05 11:29:24 2007


On Oct 5, 2007, at 11:10 AM, [email protected] wrote:

On Thu, 04 Oct 2007 13:01:19 EDT, Marshall Eubanks said:

## hop_histogram
# hop_histogram   1      1    968  2.78565e+07
# hop_histogram   2   1587  32780  7.74648e+08
# hop_histogram   3  12829 122320  1.06436e+09
# hop_histogram   4   8754  56473  2.98075e+08
# hop_histogram   5   2549  14877  4.19192e+07
# hop_histogram   6    432   1932  1.18231e+07
# hop_histogram   7     39    215  872786
# hop_histogram   8      6     32  50112
# hop_histogram   9      0      0  0
# hop_histogram  10      0      0  0
# hop_histogram  11      0      0  0
# hop_histogram  12      0      0  0
# hop_histogram  13      0      0  0
# hop_histogram  14      1      1  4094

Are you able to share the identity/AS path of that outlier at 14, or at least
explain how somebody got a path length of 14 without any paths of lengths 9
through 13 showing up? 

Yes -
Here it is :

AS 3010 SPRINT-MRN-BLOCK | 1 prefixes | 1 prefixes & 1 ASN supported | 4094 Addresses | 14 hops | as path 174 3491 18734 28509 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010

here is the only address block :

*> 201.160.16.0/20 38.101.161.116 4001 0 174 3491 18734 28509 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 i

I assume that this is some odd internal Sprint thing - maybe a lab in Mexico as it is going through 28509 ?

28509 MX-TCSC23-LACNIC [RUM] {62270 - cuernavaca - MO, MX} TV Cable S.A. de C.V.

None of the other 3001-3009 appear directly.

Could this be some new form of AS path prepending ? I really don't know.

Regards
Marshall