[routing-wg]Idea about AS-usage on IXPs

On Fri, Dec 01, 2006 at 02:18:40PM +0100, Kurt Kayser wrote:
>Hi Randy,
>
>Randy Bush wrote:
>>>Is inter-IXP-traffic really typical/necessary?
>>
>>>from a router on IX A, i want a nice clean traceroute to a router on IX
>>B, and only have access to that IX via my friend's network on IX A.
>
>If the router is not an IXP-owned router, each participating router is in a 
>"normal" AS.
>
>But I might be really wrong in order to save a couple of 2-Byte AS-numbers,
>but somehow I have the feeling that 2-Byte space is out much faster that 
>anticipated.
>So how far are we in globally reachable 4-Byte AS-numbers yet? (different 
>topic).

According to RIPE-389 (http://www.ripe.net/docs/asn-assignment.html#19):

1.9 4-Byte AS Numbers

RIPE NCC will assign 4-Byte AS Numbers according to the following timeline:

    * From 1 January 2007 the RIPE NCC will process applications that specifically request 4-byte only AS Numbers and assign such AS Numbers as requested by the applicant. In the absence of any specific request for a 4-byte only AS Number, a 2-byte only AS Number will be assigned by the RIPE NCC.
    * From 1 January 2009 the RIPE NCC will process applications that specifically request 2-byte only AS Numbers and assign such AS Numbers as requested by the applicant. In the absence of any specific request for a 2-byte only AS Number, a 4-byte only AS Number will be assigned by the RIPE NCC.
    * From 1 January 2010 the RIPE NCC will cease to make any distinction between 2-byte only AS Numbers and 4-byte only AS Numbers, and will operate AS Number assignments from an undifferentiated 4- byte AS Number allocation pool.

Terminology

"2-byte only AS Numbers" refers to AS Numbers in the range 0 - 65535

"4-byte only AS Numbers" refers to AS Numbers in the range 1.0 - 65535.65535 (decimal range 65,536 - 4,294,967,295)

"4-byte AS Numbers" refers to AS Numbers in the range 0.0 - 65535.65535 (decimal range 0 - 4,294,967,295)

-- 
Regards,
Volodymyr.