[c-nsp] private use for 4byte ASN

[Asbjorn Hojmark - Lists]

While IANA may not have allocated anything for private use, 65536-65551 are
reserved for documentation, and those are of cause 32-bit numbers.

http://www.iana.org/assignments/as-numbers/as-numbers.xml

(A separate ASN per site, however, makes little sense to me).

-A

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ge Moua
Sent: Thursday, February 16, 2012 7:04 AM
To: Daniel Kratz; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] private use for 4byte ASN

Hi
David K-
Your the second person who's told me that; thanks.

For a large organization with a few thousand branch sites (using BGP for 
internal inter-connectivity and without the need to advertise the 
AS_Path to the pubic Internet), I was thinking it be nice designate a 
private ASN per site.

Of course this count would exceed that of what 2byte / 16 bit ASN would 
prescribe per RFC-1930.  I was hoping that maybe the use of 4byte / 
32bit ASN would provide an expanded range of private ASN to meet this 
requirement.

I was hoping to avoid BGP trickery such AS-overide and the like.

Thanks again for the feedback.

--
Regards,
Ge Moua

University of Minnesota Alumnus
Email: moua0100 at umn.edu
--


On 2/15/12 5:16 PM, Daniel Kratz wrote:
> Hi Ge Moua,
>
> IANA did not allocate 4bytes AS to private use[1].  Probably they 
> considered that the range between 64512 ~ 65534 from 16bits ASN is enough.
> The 32bits ASN is easy to get/justify than 16bits ASN... Same thinking 
> is valid to get an IPV6 CIDR.
>
> []'s
> Kratz
>
>
> [1] - IANA Autonomous System Numbers
> http://www.iana.org/assignments/as-numbers/as-numbers.xml
>
> 2012/2/15 Ge Moua <moua0100 at umn.edu <mailto:moua0100 at umn.edu>>
>
>     Does anyone know if there is a RFC standard that define private
>     use of (32bit) 4byte ASN?  I was hoping that since 4byte ASN
>     allows for a much larger range then the same would be for
>     best-practice use of private ASN as well.
>
>     --
>     Regards,
>     Ge Moua
>     moua0100 at umn.edu <mailto:moua0100 at umn.edu>
>     --
>
>
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