TWT - Comcast congestion

Drew Linsalata drew.linsalata at gmail.com
Tue Nov 30 21:51:45 CST 2010


While its "pile on Comcast night", I'll add that that the Comcast peers with
Cablevision Lightpath are also a mess in New York, Ashburn and Chicago right
now.  Have been for at least the last hour or two.  According to Cablevision
we were not the first to report it and the feedback I have from them is that
this is an ongoing issue with Comcast over the last week or so.



On Tue, Nov 30, 2010 at 12:29 AM, Jon Lewis <jlewis at lewis.org> wrote:

> 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                |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
>
>



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