More Questions of Exchange Points

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

I mean in a trace (from traceroute probing), 2 exchange points (in Mr
Woodcock's list) are next to each other.

.... ip of AS1, ip of EP1, ip of EP2, ip of AS2, ....

I thought they are connected to each other directly (probably the
connecion is not as simple as the p2p link between 2 routers).

  I 'spect that you are seeing something like secondary IP s
  on the same phys interface.

> > Are those private peering points?
> confusion of terms. When bits cross an administrative boundary
> [...]

Sorry, I did confuse peering with transit. But I thought those private peering
points are somewhat similiar too the IXs, ISPs exchange traffic there and they
may also provide transit to the customers there.

  Nope. You remain confused. exchanges are not "peering" or "transit"
  or a floor wax. ISP policies determine if they propgate routes
  or not and if they are willing to propogate third party routes
  e.g. routes not originated by their direct neighbors. exchanges
  are just a way to interconnect between ISPs.

> So. Is this one exchange point (one switch), four exchange points
> ( 4 VLANS), or five exchange points ( 5 subnets)? Which ones are
> public? Which ones are private? and why?

Is this case very common?

  More than you would want to beleive. Now answer the question.


  I 'spect that you are seeing something like secondary IP s
  on the same phys interface.

AADS Nap connects to STAR NAP, but I think it's a special case, because STAR
NAP is funded by AADS. FIU connects to rsix, one is in Florida, the other is in