Re: More Questions of Exchange Points

[Ruomei Gao <gte489q () prism gatech edu>]

Sorry about the empty mail sent by mistake just now.

>       list) on the same shared media.  His list argues that these
>       distinct subnets are unique exchanges.  My take is that they
>       are not but that is a nit argument.  There are lots of ways to
>       slice the exchange point.

I did observe 2 exchange points have direct connection between them, does it mean
they belong to the same switch fabiric?

> > The difference between a peering exchange and a transit exchange is a much
> > more easily technically-defined difference: a peering exchange is one
> > across which, by and large, the participants just exchange peering routes.

Do you mean the participants just exchange BGP routing information?  So the
traceroute data will only discover the peering point they exchange traffic?

ISPs exchange their traffic at IXs or private peering points, so which
is more important to the ISPs (in term of traffic volume or other
measures)? Maybe I should also mention co-locators, then what's the
difference between co-locator and the "carrier hotel"? Are they like
"physical layer exchange points" (if there is such a concept)? Are
there any other methods to exchange traffic between peers?

>       Humph. Difference w/o (significant) distinction.
>       If -ANY- isp provides transit off the exchange fabric,
>       does that make it a transit exchange?  If not, why not?

Are those private peering points?

Regards,

Ruomei