On Thu, 9 Jan 2003, Bill Woodcock wrote:
> The LINX consists of a handful > of distributed and interconnected switches such that customers are able to > choose which site they want for colo. Likewise for the AMS-IX and a handful > of other dominant European exchanges.
Correct. Within the metro area. That is, as has been documented many times over, a necessary condition for long-term stability.
Theres an increasing number of "psuedo-wire" connections tho, you could regard these L2 extensions an extension of the switch as a whole making it international. Where the same pseudo wire provider connects to say LINX, AMSIX, DECIX your only a little way off having an interconnection of multiple IXs, its possible this will occur by accident .. Steve
> >It's one of the many, many ways in which exchange points commit suicide. > > I'd love to see a list of the ways IXes commit suicide. Can you rattle off > a few?
1) Cross the trust threshhold in the wrong direction. 2) Cross the cost-of-transit threshhold in the wrong direction. 3) Increase shared costs until conditions 1 and/or 2 are met.
Those are sort of meta-cases which encompass most of the specific failure modes. Of course, you can always declare yourself closed or obsolete, a al MAE-East-FDDI, which I guess would be a fourth case, but rare.
-Bill