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Internet Exchange Point(IXP) questions
>> On the Seattle Internet Exchange (SIX) we have ARIN-assigned
>> addresses that we use on the Layer 2 fabric (your type 2 above).
>> Hopefully the addresses aren't being announced at all, although we
>> sometimes have to chase down people that announce it.
> I've had to deal with exchanges like this in the past, and frankly
> they have always been a pain for the support organization.
> You see, customers use tools like mtr or Visual Traceroute that do
> a traceroute and then continuously ping each hop. Many of these
> customers don't have a default route, or default to their _other_
> provider. These tools end up showing 100% loss at the exchange,
> as they get the traceroute response and then can't ping it.
> They then open a ticket, and your support organization has to explain
> to them how all of this works and why it isn't the real cause of
> their problem.
> My preference is that the exchange get an ASN, peer with everyone
> (e.g. from the route server) and announce the exchange prefix.
i do not like route servers or peering with strange things.
treat the exchange as an internal route and announce it within your
net and to your customer cone.