Is there list of IXPs (containing the information of the AS# of the IXP)

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1

Hi everyone,

I'm searching for a list of IXPS which contains the information of the ASN of the IXP. Some resources are good:

https://prefix.pch.net/applications/ixpdir/?show_active_only=0&sort=traffic&order=desc
https://www.telegeography.com/products/internet-exchange-directory/profiles-by-name/index.html

but they do not contain the AS# of the IXP. Can anybody help me?

Thanks!

Best!

2

IXs themselves do not have ASNs, as they are Layer 2 providers.

The prefixes used for the peering fabric might be part of some ASN
though (eg AMS-IX uses 1200).

Check http://www.peeringdb.com for most likely the info you are really
looking for.

Greets,
Jeroen

3

I'm searching for a list of IXPS which contains the information of the
ASN of the IXP.

the best source is https://www.peeringdb.com/

[ i was amused to find CIX (http://www.cix.org/, the one which used to be
  in the bay) still in my ix bookmarks. ]

randy

4

I'm searching for a list of IXPS which contains the information of the ASN of the IXP.

* randy@psg.com (Randy Bush) [Mon 22 Dec 2014, 14:54 CET]:

the best source is https://www.peeringdb.com/

It's not. Let's take an example, AMS-IX: https://www.peeringdb.com/private/exchange_view.php?id=26
That record doesn't say AS1200 anywhere. You'll have to search for "Amsterdam Internet Exchange" to find AS1200; a search for "AMS-IX" will lead you only to its route server ASN. There is no way to filter participants by IXP as "Network Type" doesn't offer that option.

Euro-IX will give you most serious IXPs globally. For example, https://www.euro-ix.net/ixps/2-AMS-IX#network is AMS-IX's entry and it lists all pertinent information.

  -- Niels.

5

most modern IXPs will have an ASN for their route server, and possibly a
separate asn for their mgmt infrastructure.

Not sure how useful the mgmt ASN is, although most IXPs will paradoxically
include this on their list of members.

Nick

6

Thanks for your help!

I studied all the AS-Path in the routing table (from routeviews and RIPE), and found that some ASN of IXPs were included in some AS-Path. I think that under normal circumstances they should not appear in the AS-Path, hence i want to filter out them.

Best!

7

* nick@foobar.org (Nick Hilliard) [Mon 22 Dec 2014, 15:28 CET]:

Not sure how useful the mgmt ASN is, although most IXPs will paradoxically include this on their list of members.

As long as they don't count it for their total connected parties
statistics, I'm good with it being included in the list, to help
people find missing or since-disconnected peers at the IXP in an
automated fashion.

  -- Niels.

8

IXs themselves do not have ASNs, as they are Layer 2 providers.

most modern IXPs will have an ASN for their route server, and possibly a
separate asn for their mgmt infrastructure.

Not sure how useful the mgmt ASN is, although most IXPs will
paradoxically
include this on their list of members.

Nick

Thanks for your help!

I studied all the AS-Path in the routing table (from routeviews and
RIPE), and found that some ASN of IXPs were included in some AS-Path.

You are likely seeing IP addresses from the peering LAN, which typically
have addresses that are under the ASN from an IX.

Quite a few IXes state that the peering prefixes should not be announced
world-wide.

I think that under normal circumstances they should not appear in the
AS-Path, hence i want to filter out them.

"Filtering them out" will have fun results when a valid ICMP is being
returned. Something about "Packet Too Big"...

What is the reason for thinking you need to filter these?

Greets,
Jeroen

9

it is inappropriate to include it in the number of connected parties, but
there's no problem including the IXP ASN in the list of connected parties
so long as it's made clear that they're not standard IXP participants.

Nick