204.17.16.0/20 Unreachable via Comcast ASN 7992; Looking for Help or Contacts

Mon Aug 5 17:32:43 UTC 2013

Thanks for the assistance everyone. This issue was resolved by shutting down a BGP peering session between Time Warner and Comcast. --Chad

Chad M. Reid, Network Administrator II
Work Hours: Sun. - Tue. 6AM-6PM and  Wed. 6AM-3PM (MST -7)
Apollo Group | IT Services │ IT Operations Center (ITOC)
4025 S. Riverpoint Parkway │ MS: AA-M002 │ Phoenix, AZ 85040
phone: 602.557.6746 │ fax: 602.557.6606 │ email: chad.reid at apollogrp.edu

-----Original Message-----
From: Chad Reid
Sent: Sunday, August 04, 2013 7:41 AM
To: 'nanog at nanog.org'
Subject: 204.17.16.0/20 Unreachable via Comcast ASN 7992; Looking for Help or Contacts

Hello NANOG,

A few hundred of our users that use Comcast in the South East United States (other regions aren't affected) are unable to access our websites in the IP block 204.17.16.0/20. Based upon testing with the users, they're getting a destination unreachable from a Comcast backbone router in ASN 7922:
be-16-pe03.56marietta.ga.ibone.comcast.net [68.86.83.134] reports: Destination net unreachable.

We're not a customer of Comcast, nor are any of our ISPs. Because of this, we can't find anyone at Comcast to look at this issue nor do we have good contact info to even reach someone. Our users in the South East can open tickets with Comcast technical support, but you can imagine how successful they are trying to explain this to frontline support and getting frontline support to understand.

Is anyone from Comcast on the list that can assist or know of a contact?

Chad M. Reid, Network Administrator II
Work Hours: Sun. - Tue. 6AM-6PM and  Wed. 6AM-3PM (MST -7) Apollo Group | IT Services │ IT Operations Center (ITOC)
4025 S. Riverpoint Parkway │ MS: AA-M002 │ Phoenix, AZ 85040
phone: 602.557.6746 │ fax: 602.557.6606 │ email: chad.reid at apollogrp.edu

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