TWT - Comcast congestion

Jon Lewis jlewis at lewis.org
Mon Nov 29 23:29:31 CST 2010


Anyone else seeing this or know the cause?

  5:  ash1-pr2-xe-2-3-0-0.us.twtelecom.net (66.192.244.214)  29.758ms
  6:  pos-3-11-0-0-cr01.ashburn.va.ibone.comcast.net (68.86.86.145) asymm 11 846.582ms
  7:  pos-1-7-0-0-cr01.atlanta.ga.ibone.comcast.net (68.86.87.86) asymm  8 866.718ms
  8:  pos-1-11-0-0-cr01.dallas.tx.ibone.comcast.net (68.86.85.221) asymm 10 879.171ms
  9:  pos-0-11-0-0-cr01.losangeles.ca.ibone.comcast.net (68.86.87.37) asymm 11 925.695ms
10:  pos-0-12-0-0-cr01.sacramento.ca.ibone.comcast.net (68.86.86.5) asymm 14 919.159ms

We opened a ticket with TWT and were told we weren't the first to report 
the issue, but there was no ETR.  I adjusted our routing to depreference 
TWT for reaching AS7922...which is kind of funny because Comcast clearly 
doesn't seem to want traffic via the route we're now sending it.

3356 7922 7922 7922

Don't want traffic via Level3...but can't take it via TWT?..I'll send it 
to you over Level3.  At least that path works.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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