Trying to Make Sense of the Comcast/Level 3 Dispute

Fri Dec 3 18:34:06 UTC 2010

my guess is the info for that was pulled off comcast's route server, where
only tata is seen

BGP routing table entry for 98.137.128.0/19, version 681406320
Paths: (8 available, best #8, table Default-IP-Routing-Table)
  Not advertised to any peer
  6453 10310 36752 36752, (received & used)
    68.86.1.43 (metric 72251) from 68.86.80.5 (68.86.1.5)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:43 7922:3050 7922:3120
      Originator: 68.86.1.43, Cluster list: 68.86.1.5
  6453 10310 36752 36752, (received & used)
    68.86.1.40 (metric 78885) from 68.86.80.15 (68.86.1.15)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:40 7922:3050 7922:3120
      Originator: 68.86.1.40, Cluster list: 68.86.1.15
  6453 10310 36752 36752, (received & used)
    68.86.1.41 (metric 85042) from 68.86.80.7 (68.86.1.7)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:41 7922:3050 7922:3120
      Originator: 68.86.1.41, Cluster list: 68.86.1.7, 68.86.1.13
  6453 10310 36752 36752, (received & used)
    68.86.1.44 (metric 101555) from 68.86.80.10 (68.86.1.10)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:44 7922:3050 7922:3120
      Originator: 68.86.1.44, Cluster list: 68.86.1.10
  6453 10310 36752 36752, (received & used)
    68.86.1.42 (metric 70822) from 68.86.80.0 (68.86.1.0)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:42 7922:3050 7922:3120
      Originator: 68.86.1.42, Cluster list: 68.86.1.0
  6453 10310 36752 36752, (received & used)
    68.86.1.41 (metric 85042) from 68.86.80.13 (68.86.1.13)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:41 7922:3050 7922:3120
      Originator: 68.86.1.41, Cluster list: 68.86.1.13
  6453 10310 36752 36752, (received & used)
    68.86.80.11 (metric 92374) from 68.86.80.11 (68.86.1.11)
      Origin IGP, metric 0, localpref 250, valid, internal
      Community: 7922:11 7922:3050 7922:3120
  6453 10310 36752 36752, (received & used)
    68.86.1.46 (metric 65585) from 68.86.80.2 (68.86.1.2)
      Origin IGP, metric 0, localpref 250, valid, internal, best
      Community: 7922:46 7922:3050 7922:3120
      Originator: 68.86.1.46, Cluster list: 68.86.1.2

On Fri, Dec 3, 2010 at 9:30 AM, Matthew Petach <mpetach at netflight.com>wrote:

> On Fri, Dec 3, 2010 at 6:49 AM, Leo Bicknell <bicknell at ufp.org> wrote:
> > In a message written on Wed, Dec 01, 2010 at 09:40:01PM -0800, Paul
> Ferguson wrote:
> >> Interesting article:
> >>
> >>
> http://www.freedom-to-tinker.com/blog/sjs/trying-make-sense-comcast-level-3
> >> - -dispute
> >
> > Here's an excellent summary, complete with some pictures:
> >
> >
> http://www.voxel.net/blog/2010/12/peering-disputes-comcast-level-3-and-you
> >
> > --
> >       Leo Bicknell - bicknell at ufp.org - CCIE 3440
> >        PGP keys at http://www.ufp.org/~bicknell/
> >
>
>
> Unfortunately, they got at least part of the diagram wrong;
> Yahoo uses Global Crossing to reach Comcast, not TATA.
>
> Matt
>
>