AT&T carrying rfc1918 on the as7018 backbone?

Thu Jan 22 22:40:26 UTC 2004

On Thu, Jan 22, 2004 at 03:21:01PM -0700, Brett Watson wrote:
> 
> First, yes I know I should call AT&T but I want to know if anyone else sees
> this problem:

[snip]

[random destinations chosen, first few hops removed on purpose]

traceroute to 10.150.5.1 (10.150.5.1), 30 hops max, 38 byte packets

 4  bic04-p2-0.rosehe1.mn.attbb.net (24.31.2.46)  9.621 ms  12.405 ms  8.635 ms
 5  12.118.239.77 (12.118.239.77)  21.055 ms  22.684 ms  17.674 ms
 6  tbr1-p012301.cgcil.ip.att.net (12.123.6.9)  21.249 ms  18.653 ms  32.055 ms
 7  tbr1-cl1.sffca.ip.att.net (12.122.10.6)  60.504 ms  65.109 ms  63.290 ms
 8  gbr1-p10.sffca.ip.att.net (12.122.11.66)  60.401 ms  62.929 ms  59.776 ms
 9  gar1-p360.sffca.ip.att.net (12.123.13.57)  60.556 ms  60.769 ms  63.278 ms
10  12.126.195.122 (12.126.195.122)  62.064 ms  60.966 ms  64.617 ms
11  12.244.67.25 (12.244.67.25)  75.027 ms  68.277 ms  66.029 ms
12  12.244.67.21 (12.244.67.21)  66.410 ms  67.539 ms  67.902 ms
13  12.244.98.215 (12.244.98.215)  68.285 ms  69.883 ms  83.187 ms
14  10.150.5.1 (10.150.5.1)  72.288 ms  72.797 ms  70.952 ms

traceroute to 10.240.0.1 (10.240.0.1), 30 hops max, 38 byte packets

 4  bic04-p2-0.rosehe1.mn.attbb.net (24.31.2.46)  12.024 ms  9.476 ms  9.918 ms
 5  12.118.239.77 (12.118.239.77)  30.056 ms  20.397 ms  17.087 ms
 6  tbr2-p012301.cgcil.ip.att.net (12.123.6.13)  19.700 ms  36.509 ms  20.223 ms
 7  tbr2-cl7.sl9mo.ip.att.net (12.122.10.46)  27.903 ms  37.704 ms  24.727 ms
 8  tbr2-cl6.dlstx.ip.att.net (12.122.10.90)  39.469 ms  39.656 ms  39.857 ms
 9  tbr1-p013601.dlstx.ip.att.net (12.122.9.161)  39.150 ms  41.235 ms  38.007 ms
10  tbr2-cl1.attga.ip.att.net (12.122.2.90)  59.744 ms  58.258 ms  58.824 ms
11  gbr2-p20.attga.ip.att.net (12.122.12.38)  56.180 ms  62.450 ms  55.442 ms
12  gar1-p370.attga.ip.att.net (12.123.21.5)  74.746 ms  59.692 ms  57.531 ms
13  12.244.72.90 (12.244.72.90)  60.589 ms  62.514 ms  60.926 ms
14  c-66-56-66-73.atl.client2.attbi.com (66.56.66.73)  57.664 ms

ATTBB (Now Comcast) uses ATT.net for connectivity, Comcast has to reach 
all their cable modems across the USA from their outsourced tech support
centers, thus, att.net routes 10/8 across their network.

-- 
Matthew S. Hallacy                            FUBAR, LART, BOFH Certified
http://www.poptix.net                           GPG public key 0x01938203