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-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Ge Moua Sent: Thursday, February 16, 2012 7:04 AM To: Daniel Kratz; cisco-nsp@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: moua0...@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 <moua0...@umn.edu <mailto:moua0...@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 > moua0...@umn.edu <mailto:moua0...@umn.edu> > -- > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > <mailto:cisco-nsp@puck.nether.net> > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > -- > "Any fool can know. The point is to understand." > Albert Einstein _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/