Re: MAE-east weirdness

["Karl Denninger, MCSNet" <karl () mcs com>]

> Hey folks.
>
> I'm working with my friends at National Public Radio. They're having 
> network problems, and I'm not sure the correct people at UUNet to report 
> this anomaly to. The answer NPR got from UUNet was: MFS trouble in 
> Dallas. Does that make sense?
>
> any suggestions?
>
> thanks in advance. sorry for the interruption.
>
> # /usr/local/bin/traceroute npr.org
> traceroute to npr.org (199.0.132.69), 30 hops max, 40 byte packets
>  1  router.butterfly.net (199.73.40.1)  7 ms  5 ms  3 ms
>  2  s0.router.clark.net (199.73.41.254)  12 ms  15 ms  12 ms
>  3  sl-dc-1-S19-T1.sprintlink.net (144.228.4.1)  19 ms  29 ms  17 ms
>  4  sl-dc-8-F0/0.sprintlink.net (144.228.20.8)  21 ms  19 ms  17 ms
>  5  sl-mae-e-H2/0-T3.sprintlink.net (144.228.10.42)  26 ms  18 ms  19 ms
>  6  Vienna1.VA.Alter.Net (192.41.177.249)  26 ms  297 ms *
>  7  sl-mae-e-F0/0.sprintlink.net (192.41.177.241)  22 ms  31 ms  44 ms
>  8  Vienna1.VA.Alter.Net (192.41.177.249)  62 ms  87 ms *
>  9  sl-mae-e-F0/0.sprintlink.net (192.41.177.241)  37 ms  36 ms  28 ms
> 10  Vienna1.VA.Alter.Net (192.41.177.249)  63 ms  83 ms  77 ms
> 11  sl-mae-e-F0/0.sprintlink.net (192.41.177.241)  21 ms  32 ms  27 ms
> 12  Vienna1.VA.Alter.Net (192.41.177.249)  40 ms  50 ms  68 ms
> 13  sl-mae-e-F0/0.sprintlink.net (192.41.177.241)  33 ms  19 ms  31
>
> --Dave
> http://iron.butterfly.net/motodave

Well, at a zero-level information point (which is all I have from here :-)
this looks like Sprintlink thinks that network is reachable via Alternet,
and Alternet thinks it is reachable via Sprintlink.

Thus the looping.  I'd contact the respective NOCs and let them hash it out.
At least one of these two is (obviously) wrong. :-)

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