ASN and Peering Problem

We currently have two /19 that we advertise on a single ASN. A client
would like to obtain /23 or /22 from us. This is not a problem, except
that their primary internet provider is someone else, other than us.
I think that they would need to have their own ASN to advertise their
portion of our ip space to their peers.

My question is, should we provide the ASN or should they apply for an ASN?
What is the minimum block considered routable, is it reasaonable to
advertise a /23 on its own ASN?

Are there any other solutions I haven't thought of?

Thanks,
Adi

We currently have two /19 that we advertise on a single ASN. A client
would like to obtain /23 or /22 from us. This is not a problem, except
that their primary internet provider is someone else, other than us.
I think that they would need to have their own ASN to advertise their
portion of our ip space to their peers.

My question is, should we provide the ASN or should they apply for an ASN?

They should.

What is the minimum block considered routable, is it reasaonable to
advertise a /23 on its own ASN?

Many people do /24s. There is no real difference between a /24 and /23 in most people's filters. A /20 may or may not get them more reachability, but as long as you accept their /23 and announce the aggregate CIDR, it should not matter.

Are there any other solutions I haven't thought of?

Yes, but they are all bad. :slight_smile:

Assuming that this is in North America (this is NAnog, afterall), they
should probably apply to ARIN for both the /22 (if they can justify that
much space) and the ASN, or, get the ASN from ARIN and the space from you.

As of policy 2002-3, ARIN will assign /22s to end users that have need of
a unique routing policy and meet other tests necessary for such an assignment.
These are the same tests you would be required to hold them to for you to
assign them a PA /22.

Owen

--On Wednesday, December 8, 2004 13:59 -0600 Adi Linden <adil@adis.on.ca> wrote:

If I understand, they would like you and the other provider
to both announce the IP space, from your respective ASN's.

Real-world, this will work, but causes an "inconsistent
origin" bgp error.

-ejay

From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]

On

Behalf Of Adi Linden
Sent: Wednesday, December 08, 2004 1:59 PM
To: nanog@merit.edu
Subject: ASN and Peering Problem

We currently have two /19 that we advertise on a single

ASN. A client

would like to obtain /23 or /22 from us. This is not a

problem, except

that their primary internet provider is someone else,

other than us.

I think that they would need to have their own ASN to

advertise their

portion of our ip space to their peers.

My question is, should we provide the ASN or should they
apply for an ASN?
What is the minimum block considered routable, is it

reasaonable to